Device to carry out chromatographic separation of gas-vapourt mixes
FIELD: process engineering.
SUBSTANCE: invention relates to process engineering and can be used in deeper conversion of hydrocarbons, their cracking and reforming. Proposed device comprises three chromatographic columns, one for sorbent layer regeneration from the mix heavy fraction and the other two for mix separation and release of light fraction. Aforesaid columns are divided into sections, each filled with sorbent that moves forced by carrier gas. The latter is fed from the first section and withdrawn from the third section, via transition channels incorporating controlled switching elements. Each column communicates with the system of preparation of introduction of the mix to be separated and with fraction collectors. There is a sorption-desorption activator arranged in sample preparation and introduction line to destruct complex organic molecules and distill separated substance.
EFFECT: higher efficiency.
The invention relates to a device for separating a mixture of gases and vapors by gas chromatography and can be used in deep processing of hydrocarbon raw materials, cracking and reforming.
A device (1) for chromatographic separation of binary gas mixtures containing three chromatographic columns, one of which serves for regeneration of a layer of sorbent from the heavy fraction of the mixture, and the other two are for the separation of mixtures and output light fraction. The chromatographic column are connected to each other transitional channels that have switching elements, each of the columns of additional gas channels defined switching elements connected with a source of partial mixture and system receivers to collect fractions. The disadvantage of this device (1) is the use of chromatographic columns with a fixed bed of the sorbent at a given purity of the secreted product.
A device (2) for the chromatographic separation of mixtures of gases and vapors containing three chromatographic columns, one of which serves for regeneration of a layer of sorbent from the heavy fraction of the mixture, and the other two are for the separation of mixtures and output partial fractions, connected to each other transitional channels, which has a switching element is. Each of the columns of additional gas channels with installed managed switching elements connected to the dosing system and evaporation of the liquid sample partial mixture consisting of storage tanks, compressor, evaporator and heater carrier gas, and with a system of receivers to collect fractions. The column is divided into sections, each of which is filled with selective components shared substance sorbent, movable under the pressure of the carrier gas. Enter the carrier gas is carried out with the first section and the outlet from the last section in the idler channel passing through a column filled with a layer of stationary sorbent. The device can operate in combined mode with movable and fixed bed of sorbent.
The device (2) is the prototype of the offer. The drawback of the device (2) is overloading the initial sections of the chromatographic column due to the heavy fractions separable mixtures, reducing its performance. The aim of the invention is to improve the performance of preparative chromatographic columns. This objective is achieved in that the device for the chromatographic separation of gases and vapors containing three chromatographic columns, one of which serves for regeneration of a layer of sorbent from the heavy fraction of the mixture, and the other two to sec the population mix and output partial fractions, connected to each other transitional channels that have switching elements; each of the columns of additional gas channels, with installed switching elements connected to the dosing system and evaporation of the liquid sample partial mixture consisting of storage tanks, compressor, evaporator and heater carrier gas, and the system receivers to collect fractions, the column is divided into sections, filled selective components shared substance sorbent introduced in the first section, and the withdrawn with the last section on the idler channel passing through a column filled with a layer of stationary sorbent; between compressor and evaporator shared substance is installed activator sorption-desorption process, carrying out the degradation of complex organic molecules and partial distillation of the substance.
For example, the activator may be an apparatus of the vortex layer (3)having a rotating electromagnetic field in which to enter a partial dose of a substance and ferromagnetic particles.
The figure 1 presents a schematic diagram of a device. The device comprises a chromatographic column 1, 2, 3, separated nets in sections 4, 5, 6, each of which is filled with sorbent, allowing you to work in pseudo is eigendom mode, part of the cross section of the columns in the form of drainage channels 7, 8, 9, the last section of the column deduce a partial mixture through the transfer channels 10, 11, 12, which is equipped with switching elements made, for example, in the form of a compact diaphragm valves 13, 14, 15, operated by means of compressed air.
For the supply and withdrawal of gas flows in each column is provided by the channels 16 with the managed switching elements 17, such as diaphragm valves.
Adjustable flow of carrier gas from the collection of fractions 22, 23 are combined and fed through a manifold 40 to the compressor 24, being purified in installed on the discharge line 18 filters 26, thus forming a closed recirculation system the carrier gas. Possible loss of carrier gas by condensation allocated fractions are compensated by the flow of gas from the high-pressure bladder 33. The flow of carrier gas from a source 33 is regulated by the flow meter 34.
System preparation and input shared substance contains the metering device 27, the activator sorption-desorption process 35, consisting of inductor 36, reactor 37, chamber 38, the ferromagnetic particles 39, the treatment device 28 partial mixture, which may include an evaporator for the liquid (if a partial mixture of liquid) or a device for heating gas to the temperature of the column (if the partition is who controls the gaseous mixture).
Mounted on the metering device 27 sample partial mixture is introduced into the adjustable volume chamber 38 of the reactor 37.
The camera 38 is pre-filled with a certain amount of ferromagnetic particles. Turns on the inductor 36 activator 35, creating a rotating electromagnetic field. In chamber 38 of the reactor 37 ferromagnetic particles, together with a partial mixture start to rotate in a moving electromagnetic flow, forming a vortex layer in which appears a number of effects: cavitation, electrolysis, electric arc discharge, heat, resulting in degradation of complex organic molecules and partial fractionation of the mixture.
This allows you to eliminate the overload of the initial sections of the chromatographic column and to reduce the load on the evaporator 28.
At the initial moment of the flow of carrier gas (w2), supporting the sorbent in a fluidized bed mode of the common collector 18 is input to the chromatographic column 1, through its regeneration from the heavy fraction, with the transition channel 12 between columns 1 and 3 is blocked by the valve 15. With the last section of the column flow through the outlet channel 7 is returned to the beginning of the column and part of it (w1) is discharged into the reservoir 19 to collect the heavy fraction of the mixture. The remaining part of the flow (w2-w1) passes through the column 2 and 3 of the IP output column 3 is directed into a manifold 20 for collecting light fraction partial mixture.
Put a portion of the mixture, picked up by the flow of w2the carrier gas moves along the layer of sorbent in the column 3 in the direction of either a thread exit w2the carrier gas. At that time, when a certain section moving chromatographic strip will be half the length of the column 3, automatically switch the valves on the channels for the supply and withdrawal of gas flows, with designated input and output a carrier gas to move along the columns by a distance equal to the length of one column. In this position, the carrier gas (flow w2) is input to column 2, through its regeneration. The valve 13 in a transitional channel between columns 1 and 2 overlap, and the column outlet 3 is connected to the input of the column 1. In this part of the flow of carrier gas (w1after passing through the column 2 is discharged into the reservoir 19 to collect the heavy fraction of the mixture, and the remainder of the stream (w2-w1) passes through the column 3 and 1 and is displayed in the header 20 for collecting the light fraction of the mixture.
w1the flow rate of the carrier gas, corresponding to the beginning of fluidization of the adsorbent.
w2the flow rate of the carrier gas, corresponding to the end of fluidization of the adsorbent, and w2-w1≥w1.
Chromatographic strip, where there is a separation of the mixture components due to differences in / min net is Yah move them along the layer of sorbent, moves from column 3 to column 1 flow (w2-w1) carrier gas. When the average cross section of the chromatographic strip will pass through the column 3 and will move to column 1, enter a fresh portion of the mixture in this section. After the average total cross section of the chromatographic strip formed after two consecutive inputs portions of the mixture will be half the length of the column 1, move the insertion point and output a carrier gas along the columns by a distance equal to the length of one column. With the valve block 14 transition channel between the columns 2 and 3 and simultaneously the column outlet 1 connect to the input of column 2. In this position, the flow of carrier gas (w2is entered to the input column 3, through its regeneration, and part of w1flux is output from the output of the column in the reservoir 19 to collect the heavy fraction of the mixture, and the remainder of w2-w1that flow out from the column 2 in the manifold 20 for collecting the light fraction of the mixture.
Thus, at each phase of the cycle of the chromatographic strip through the three columns, one column at maximum speed in a carrier gas w2is regeneration from the heavy fraction, and the other two are used for the separation of mixtures and output light fraction. The chromatographic strip, the front of which is enriched light fraction shared the mixture, moves in the flow of the carrier gas along the layer of sorbent and gradually moves from column 1 to column 2. When the average cross section of the chromatographic strip, the concentration of the shared components, which is close to the concentration of the components in the original mixture, passed through the column 1 and starts to move in column 2, enter a fresh portion of the mixture in the transition channel.
The total chromatographic strip continues to move with the flow of carrier gas from the column 1 to column 2, and when the average cross-section it will be half the length of the column 2, mix points of input and output gas flows in the direction of movement of the chromatographic strip by a distance equal to the length of the column. Simultaneously with the shifting of the input and output gas flow outlet of the column 2 is connected with the inlet of the column 3, and the transition channel between columns 1 and 3 overlap. In this position, the carrier gas is fed to the input of the column 1, after passing through that part of w1flow, dropping into the reservoir 19 to collect the heavy fraction, the other part of w2-w1flow passes through the column 2 and 3 and is output from the column outlet 3 in collector for collecting light fraction.
From this point, the circuit is returned to its original state, and the cycle of movement of the points of input and output gas flows and cycles recharge chromatography eskay stripes fresh portions separable mixtures are repeated in the described sequence.
The process is carried out without selection of the partial components of the mixture as long as the total length of the chromatographic strip the layer of sorbent in the process of its circulation, accompanied by the expansion of her will not be equal to the length of the column. Starting from this moment, every movement of the locations of input and output gas flows in the direction of movement of the chromatographic strip is accompanied by a selection of the products with the end parts of the strip, enriched by shared components.
For example, if the schema is in the position at which the width of the chromatographic strip the layer of sorbent is greater than the length of the column, by that time the front part of the chromatographic strip, enriched in the light component, will take place column 2 and will be eliminated by the flow of carrier gas into the reservoir 20 for collecting the light fraction. Remaining in column 1 of the rear portion of the chromatographic strip, enriched in the heavy component in the next moment when the moving location of the input and output of the carrier gas will be discharged with a part of w1flow into the reservoir 19.
The time between the points of displacement of the input and output gas flows in the direction of movement of the chromatographic strip is equal to the time for which the average cross-section of the chromatographic strip passes a distance equal to the length of the column. It can be easily determined from prior experience is in on the periodic separation of portions of the mixture. The time interval between the moments move places the input and output flow of the carrier gas and the time of filing a fresh portion of the mixture in the middle section of the chromatographic strip is equal to half the time interval between two subsequent points of displacement of the input and output.
The processing oil in the vortex layer increases the exit boiling fractions of 20-30% (3), which, of course, increases the efficiency of a chromatographic separation process.
Sources of information
1. USSR author's certificate No. 309296, CL G01 N31/08.
2. Patent No. 2119159 to the invention the Device for the chromatographic separation of mixtures of gases and vapors", the application 97102466 from 17.02.1997, prototype.
3. One, Opheliac "the Intensification of technological processes in the apparatus with a vortex layer. Kiev, Tekhnika, 1976
Device for the chromatographic separation of mixtures of gases and vapors containing three columns, one of which serves for regeneration of a layer of sorbent from the heavy fraction of the mixture, and the other two are for the separation of mixtures and output light fraction, the column is divided into sections, each of which is filled with selective components shared substance sorbent, movable under the pressure of the carrier gas, the input of which is from the first section and the outlet from the last section in the idler channel passing through the column and C is accomplished by the fixed layer of the sorbent, the columns are connected to each other transitional channels with installed switching elements, each of the columns channels with installed managed switching elements connected to the system of preparation and sample introduction partial mixture, and the collected fractions, characterized in that in order to improve the performance of the proposed device in the line of preparation and introduction of samples into the chromatographic column is installed activator sorption-desorption process, carrying out the degradation of complex organic molecules and partial distillation of the substance.
FIELD: physics, measurement.
SUBSTANCE: invention is related to chromatograph intended for analysis of gaseous substance. Device comprises supplying system for sample supply, open tubular capillary column for separation of sample components, device for temperature control for adjustment of column temperature, detector for detection of separated sample components. Specified column comprises bundle of open tubular capillaries. Besides specified capillaries have gas permeable walls that comprise polymer membrane.
EFFECT: improved chemical specificity of detector, improved strength of structure.
22 cl, 3 dwg
FIELD: physics, measurements.
SUBSTANCE: proposed method can be used in chemical, petrochemical, medical and other industries to analyse compound mixes of various substances. It differs from known techniques in that as chyral smectic decyloxi-benzylidenamino-2-methyl-butyl-ether of aminocinnamic acid vapor is used as a fixed nematic phase.
EFFECT: higher selectivity of analysis.
FIELD: physics, measurements.
SUBSTANCE: proposed method can be used in chemical, petrochemical, medical and other industries to analyse rapidly the compound mixes of various substances of natural and technogenic origin. The proposed method differs in that immobile liquid-phase film is formed on a solid carrier dynamically pre-applied by periodic metering out of the portion of aerosol of liquid-phase solution in inert gas. The proposed device incorporates a spray gun to produce mist of liquid-phase fluid solution in inert gas and an adjustable air drag bubbler.
EFFECT: higher efficiency of proposed method.
2 cl, 1 dwg
FIELD: physics, measurements.
SUBSTANCE: invention can be used in gas chromatography for quantitative analysis of compound mixes of harmful organic and inorganic substances generated by automotive ICE gas engines. The proposed gas chromatographic system incorporates the device to feed in the pre-concentrated sample, two analytical modules with flame ionisation detector and heat conductivity detector, capillary column to isolate the sample hydrocarbon components, three filled columns, methanator and reactor to reduce nitrogen oxides to total nitrogen in the presence of carbon dioxide.
EFFECT: faster analysis.
FIELD: physics; measurement.
SUBSTANCE: present invention relates to devices for separating a mixture of gases and vapours using gas chromatography method. The device has a carrier gas channel with a pressure regulator, which connects, through a control valve-switch, the reservoir of separated liquid with an intermediate measuring tank, from which a pre-set dose is forced out by the gas-carrier on another channel through a return valve fitted on its outlet and an atomiser into an evaporator. The intermediate measuring tank has concave walls for linearisation of the scale. Inside the reservoir, there is a rotating pipe with an actuator and means of moving in several degrees of freedom. The inlet opening of the rotating pipe can change its level relative the upper level of liquid in the intermediate measuring tank. A batcher, with friction members, stabilises the operational parametres of the device. The evaporation process is controlled and monitored using temperature and pressure sensors, placed in the atomiser and evaporator.
EFFECT: increased efficiency and output of the device.
FIELD: physics; measurement.
SUBSTANCE: present invention pertains to chromatography and is meant for determining total content of oil-products in water. The invention can be used for measuring concentration of oil-product impurities in natural and sewage water during ecological monitoring and other tests on the environmental medium. The method of determining total content of oil-products in water involves putting a sample into a chromatographic column with a stream of carrier gas and subsequent detection in form of a continuous peak using a flame ionisation detector. Before analysis, the contaminated water sample is homogenised, adding, for example, dimethyl sulphoxide. The homogenous sample is pumped through a microconcentrator. Polar components of the sample and the homogenising solvent are removed by pumping pure water. The microconcentrator is put into a chromatograph evaporator and heated using an external heater. Desorption of oil-products takes place using water vapour, generated by a steam generator whose pressure can be regulated.
EFFECT: fast, convenient and accurate determination of total content of oil-products in water media for various domestic purposes.
3 cl, 3 ex, 2 tbl
SUBSTANCE: chromatographic separator of mixed gases and vapours contains three columns with one used to regenerate sorbent layer from heavy mix fraction, and two others used to separate mixture and remove light fraction. Columns are sectioned. Each section is filled sorbent selective to components of separated substance. Light and heavy fraction exhaust lines after fraction tanks through collector and driven switch elements are added with chromatographic modules each containing three columns with one used to regenerate sorbent layer from heavier fraction and two others used to separate mixture and remove light fraction components. Columns are sectioned. Each section is filled sorbent selective to components of separated substance and moving under carrier gas height supplied from the first section and exhausted from the last through offtake passing through column and filled motionless sorbent layer. Number of chromatographic modules to separate binary fractions is proportional to number of these fractions in multicomponent separated mixture. Modules process variable, including temperature, separated fraction volume, sorbent selectivity, column diameter and length are individual.
EFFECT: higher efficiency and productivity of compound multicomponent mixture separation.
SUBSTANCE: novel chemical compound - 4-(4-cyanophenyl)-4'-(4-hydroxyhexyloxy)-benzylidenaniline, which possessing liquid crystalline properties, has wider temperature range of mesophase existence, higher temperature of passing into isotropic liquid (>200°C), demonstrates higher structural selectivity with respect to positional isomers of organic compounds.
EFFECT: increasing gas chromatographic column efficiency and reducing time of separation of positional isomers of organic compounds.
1 ex, 1 tbl
FIELD: chemistry; mechanics.
SUBSTANCE: device consists of serially connected detector, an analytical column, evaporator, device for preparing and inputting samples, as well as a holder for solid samples, three-way tap, the input of which has nozzle for inlet of the carrier gas, while its outputs are connected to the case of an airlock chamber and the solid samples holder respectively. The airlock chamber consists of a case and a swivel head, which have a cylindrical channel of the same diameter. The case of the airlock chamber is fixed to the evaporator such that, the cylindrical channel of the case is a continuation of the channel of the evaporator, and the swivel head is fixed to the case with provision for rotation by a 90° angle. The solid samples holder is in form of container with a calibrated opening.
EFFECT: increased authenticity of identification with simplification of the device and its use at the same time.
FIELD: technological processes.
SUBSTANCE: in suggested device for chromatographic separation of substances at the outlet of eluent with stripped components or fractions of separated substance additionally controlled flow divider is installed, which forms bypass line in relation to the main flow, on which one or several detectors that are selective to components of separated substance. Between flow divider and input to detectors analytical column is installed, the form of structure of which is similar to form of preparative columns, which are arranged in the form of curved distributed surfaces closed in space, and is equipped with dosing device with channel for eluent supply.
EFFECT: increase of efficiency of chromatographic separation.
FIELD: atomic power engineering.
SUBSTANCE: suggestion includes fluid medium distributor for fluid medium distribution to column and fluid medium collector for collecting fluid medium from column. The invention also relates to methods of using devices according to disclosed invention. As per present invention, distributor and/or collector may be used in fixed bed reactors or in fluidised-bed reactors, or in such columns as chromatographic separation columns, ion-exchange columns, adsorber columns etc. Fluid medium distributor contains: a) the first system for fluid medium transportation and b) partitioning tray comprising i) first facilities for fluid medium transfer for dividing fluid medium flow coming from delivery points into several separated fluid medium flows and for distribution of separated fluid medium flows to column; and ii) first facilities for separated fluid medium flows regulation by means of pressure difference in the first facilities for fluid medium transfer.
EFFECT: invention provides fluid medium distribution to column, for example to chromatographic column, and collecting from it with minimum time delay, minimum time delay distribution and minimum mixing volume of fluid medium fronts.
30 cl, 12 dwg, 1 tbl
FIELD: treatment plants.
SUBSTANCE: invention relates to the method of separating components of liquid load with the help of liquid-to-liquid centrifugal chromatography and the device for carrying this out. Components (A, B), which have different partition coefficients, such that these components lead to movement with different speeds respectively with the help of a light solvent (I) and a heavier solvent (L), continuously inject in some intermediate point of the separating column. After that alternating of cycles is carried out, consisting of two phases: in the first phase the heavier solvent is injected, in the second - the lighter one. In the process of each of these phases separated components (FA, FB) are collected on opposite ends of the separating columns at the injection points of the solvent. Separating device contains at least one liquid-to-liquid centrifugal chromatography column, formed in a cascade on at least one chain of parting cells. To each column is attached a pump for injecting the load (P1), pumps for injecting the first and second solvents (P2 and P3), containers for collecting the first (FA) and second (FB) components, means for alternating the switching of valves (V1 and V2). Switching of valve takes place in such a way that, it moves in an alternating sequence from the first phase with the injection of the first of the solvents (L) and collection of the second separated component (FB) to the second phase with the injection of the second solvent (I) and collection of the first separated component (FA).
EFFECT: proposed method and device makes it possible to reduce costs in the mobile phase, and carry out injection of the load in continuous and intermittent regimes.
9 cl, 2 tbl, 6 dwg
SUBSTANCE: present invention pertains to chromatographic separation of bioflavonoids. Aliphatic alcohol is extracted from hogged larch wood. The alcohol is distilled and at least one cycle of chromatographic separation of the target product on a column filled with hydrophobic sorbent, is carried out, with elution of the sorbent by the alcohol-containing mobile phase. The extraction agent and mobile phase used is an aqueous solution of the same alcohol, chosen from a group comprising: methyl, ethyl and isopropyl. The chromatographic separation cycle is carried out in a temperature-controlled column at 30-50°C in two stages. At the first stage, concentration of alcohol in the solution, deposited on the column, and in the mobile phase is the same and equals 20-40% vol. At the second stage, the solution is deposited on the column with 1-20% vol. concentration of alcohol in the solution. Elution of the sorbent is carried out with alcohol concentration in the mobile phase at least, 3% higher than concentration of alcohol in the solution, from which depositing was carried out, but higher than 30% vol. The eluate obtained from chromatography is evaporated and the residue is dried. The invention allows for obtaining high output of product with high degree of purity.
EFFECT: obtaining high output of product with high degree of purity.
4 cl, 3 ex
SUBSTANCE: present invention pertains to chromatographic separation of bioflavonoids. A solution of dihydroquercetin-containing raw material in an aqueous solution of aliphatic alcohol C1-C3 is obtained. At least one chromatography cycle is carried out with depositing a sample of the obtained solution on a column, filled with hydrophobic sorbent. The mobile phase is eluted. The sample is deposited at 1-20% vol. concentration of alcohol in the solution. The mobile phase used is an aqueous solution of the same alcohol with 3% more concentration than concentration of alcohol in the solution from which the sample is deposited, but not exceeding 30% vol. The eluate obtained from chromatography is evaporated and the residue is dried.
EFFECT: obtaining high output of product with high degree of purity.
3 cl, 3 ex
SUBSTANCE: invention relates to chemical-pharmaceutical industry and is used, in particular, for obtaining medications, purified by means of chromatography methods. The method is claimed it includes solvent-detergent inactivation of solution, containing immunoglobulin; passing solution in three different variants through the system of interconnected columns, containing anionite, cationic exchanger and hydrophobic sorbent, balanced with the same buffer solution; elution of column with cationic exchanger with obtaining high-purity immunoglobulin, virus-free. Method ensures high output and purity of target product.
EFFECT: ensuring high output and purity of immunoglobulin.
18 cl, 3 ex
FIELD: medicine, phytotherapy, pharmaceutical technology, pharmacy.
SUBSTANCE: invention relates to a composition prepared from the following raw medicinal plants: Tripterygium hypoglaucum (Levl.) Hutch, barrenwort (Epimedium), box-thorn matrimony-vine berries (Lycium) and dodder seeds (Cuscuta) taken in the following mass ratio: 1-4; 1-4; 1-4 and 1-4, respectively. Method involves the following procedures: weighing and milling of Tripterygium hypoglaucum (Levl.) Hutch and barrenwort (Epimedium), their separate boiling in water 3 times, wetting box-thorn matrimony-vine berries (Lycium) and dodder seeds (Cuscuta) in warm water at temperature 80-95°C 1-3 times, separate decantation of decocts and liquid, their separate passing through adsorption column, washing out with water up to clearing eluate, elution with 30-99.3% ethyl alcohol and mixing eluate with alcoholic liquid. The total weight of eluate is 1-8-fold more of weight of parent raw medicinal agents. Then method involves recycling each eluent of the raw medicinal agent, concentrating to specific gravity 1.1, drying extracts and their mixing. Pharmaceutical composition is used in treatment of rheumatism, rheumatic arthritis and chronic nephritis. Invention provides realization of indicated designation.
EFFECT: improved preparing method, valuable medicinal properties of pharmaceutical composition.
8 cl, 21 tbl, 13 ex
SUBSTANCE: invention relates to synthesis of organosilicon adsorbent, which can be used in a variety of national economy fields (chemistry, pharmaceutics, public health). Proposed adsorbent is nonlinear condensation product depicted by formula wherein n=88-98. Preparation procedure comprises reaction of 19-20 parts of alkali solution of sodium dihydroxymethylsilicate, density 1.16-1.19 g/cc, with 6 parts of sulfuric acid, density 1.195-1.205 g/cc, while stirring at 0-5 C until ripening of desired product is completed, after which product divided into small pieces and washed.
EFFECT: increased assortment of various-destination adsorbents.
2 cl, 3 dwg, 5 tbl, 3 ex
FIELD: nuclear technique.
SUBSTANCE: method involves treatment of an aqueous medium containing isotopes of alkali-earth metal, transient element or heavy metal of atomic mass less 209 with an organic ligand binding one or some isotopes of element to be separated. Ligand is comprised in resin or as a component of ion-exchange resin carrier or forms complex with isotope and it is retained by nano-filtration membrane. Residue comprising complex of isotopes with ligand is separated from filtrate comprising isotopes not formed the complex. For example, ligand represents N-acetamidostyrene ethylenediamine triacetate of the formula: . Invention provides enhancing effectiveness of separation and easy regulating the separation degree. Method is simple, economy and doesn't require volume equipments. Invention can be used in preparing inhibitors or absorbers of neutrons in nuclear reactors.
EFFECT: improved separating method.
35 cl, 10 ex
SUBSTANCE: proposed method includes evacuation of hermetic chamber 1 and filling it with helium. Then voltage is supplied to cathode 4 and anode 5 located respectively in cathode lead-in 2 and anode lead-in 3. Cathode lead-in 2 moves in longitudinal direction and anode lead-in 3 is immovable. After burning of anode 5, its replacement is performed automatically from rod loader 11. Anode 5 and cathode 4 are enclosed in metal casing 6 with open ends; it is mounted coaxially relative to electrodes. Casing 6 is turnable and its longitudinal axis coincides with axis of upper flange 7 and lower flange 8. Upper flange 7 is provided with axle with piston 9 for forcing fullerene-containing black to storage chamber 10 mounted on lower flange 8. Black thus obtained is subjected to treatment in Soxlet apparatus with aromatic solvent-toluene. To this end, use is made of excessive amount of black relative to saturated solution of mixture of fullerenes in toluene. Extract containing up to 95% of C60 settles on hot bottom of apparatus. Solution above sediment is enriched with C70 up to 70%. Then fullerence C60 and C70 are separated independently and in parallel in chromatographic columns with use of activated charcoal as immovable phase. Toluene or chlorobenzene is used as movable phase. Target product is crystallized and is additionally cleaned by re-crystallization or sublimation in vacuum, thus obtaining C60 at purity of 99.9% and C70 at purity of 99.5%.
EFFECT: enhanced reliability and facilitated procedure of method.
4 cl, 1 dwg
FIELD: sorption technologies.
SUBSTANCE: invention aims at preparing carbon sorbent for recovering valuables components from various production wastes. Proposed sorbent has summary water-accessible pore volume 0.2-0.3 cm3/g, specific surface 60.0-80.0 m2/g, iodine sorption activity 35.0-45.0%, benzene sorption activity 3000.0-330.0 mg/g, ash residue 45.0-47.9%, and loosed density 0.28-0.30 kg/dm3. Preparation of sorbent comprises treating peat with potassium hydroxide, separating solid and liquid phases, treating the latter with acid reagent to lower pH to 4.0-6.0 thereby obtaining gel-like precipitate and supernatant, multistage treatment of supernatant with acid reagent to lower pH to 2.0-2.5 and thereby to separate gel-like precipitates and supernatants in each stage, heat treatment of gel-like precipitates, mixing them with each other and with solid phase, carbonization of resulting product, granulation and mixing of granules with previously obtained gel-like precipitate with pH 2.0-2.5 and subsequent aeration at elevated temperature. In the proposed method of recovering metal salts from wastes, waste is ground and leached with solution containing fulvene acids followed by sorbent-assisted chromatographic fractionation and recovery of corresponding metal salts. After separation of solid and liquid phases, the latter is passed through sorbent, which is further regenerated with sulfuric acid solution. Solid phase is fractioned via multistage treatment with fulvene acids-containing eluent solution, while raising pH of solution in each stage. Eluates from each stage are separately brought into contact with sorbent, which is further regenerated with sulfuric acid solution.
EFFECT: facilitated recovery of valuable waste components.
7 cl, 2 tbl, 3 ex
FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for separation of high-molecular lactone-containing compound. Invention describes a method for separation of lactone-containing compounds wherein mixture of lactone-containing compound showing the main chemical structure as 1,14-dihydroxy-12-[2-(4-hydroxycyclohexyl)-1-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacoz-18-ene-2,3,10,16-tetraone and at least one among (C2-C6)-alkenyl group and (C1-C6)-alkoxy-group as a side chain and similar compounds is subjected for one or both the following stages in any order: stage (A) of the mixture adsorption on non-ionic adsorbing resin and elution with an aqueous solvent containing silver ions; and stage (B) of the mixture absorption on basic aluminum oxide and elution with organic solvent for separation of each compound. Invention provides the development of effective method for separation of high-molecular compounds being without their chemical structure.
EFFECT: improved method for separation.
14 cl, 2 dwg, 2 tbl, 3 ex