Marking label for gasolines
SUBSTANCE: application relates to a marking label for gasolines which represents hydroxyl-containing derivatives of aromatic series, wherein the hydroxyl group is connected directly to the aromatic ring, selected from a series of resorcinol, 4-hexylresorcinol or β-naphthol. The proposed label can be used in low concentrations.
EFFECT: absence of its influence on the performance characteristics of marked gasolines.
3 dwg, 4 ex
SUBSTANCE: method includes the preparation of a sorbent, solution of iron (III, II), addition of a hydroxylamine solution to reduce iron (III) to iron (II), extraction of iron (II) from the solution by the sorbent, transfer of iron (II) in a complex compound on the sorbent surface, separation of the sorbent from the solution, measurement of the coefficient of diffusion reflection of the surface iron (II) complex and determination of the iron content by a calibration graph, with the application as the sorbent of aluminium oxide, successively modified by polyhexamethyleneguanidine and 3-(2-pyridyl)-5,6-diphenyl-1.2,4-triazine-4',4''-disulphoacid (ferrozine), with carrying out the measurement of a diffusion reflection coefficient at 560 nm.
EFFECT: increased sensitivity and self-descriptiveness of the analysis.
SUBSTANCE: invention can be used for semi-quantitative determination of cobalt (II) and copper (II) concentration is natural, sewage waters and various liquids under field conditions. Method includes filling glass tube with internal diameter 0.5 cm with Na-form of cation exchanger KB-2E-10 with weight 0.2 g, with further filling with analysed solution, which contains added to it sodium nitrate with concentration 1 mole/l and calcium nitrate to create medium, and estimation of cobalt and copper concentration by length of coloured zone of cation exchanger with the following content of components after tube filling, wt %: cation exchanger KB-2E-10 - 0.8; sodium nitrate - 8.5; calcium nitrate - 0.25; water - the remaining part.
EFFECT: increase of accuracy and reliability and simplification of analysis.
1 ex, 2 dwg
FIELD: measurement equipment.
SUBSTANCE: invention relates to methods of indicator detection of trace amounts of explosives and components of explosives on the basis of three groups of compound classes: nitroaromatic compounds; nitramines and nitroesters; ion nitrates. The method of express detection of explosives on the basis of a set of chemical indicators for three groups of classes of nitrogen-containing compounds includes using a reactive indicator material with reagents, previously applied in dosed quantity onto a carrier, besides, the reactive indicator material is a carrier with immobilised azocomponent of Griess reagent, which is in solid chemically modified protected form with covalently bound amides.
EFFECT: increased sensitivity and reliability, as well as faster detection.
4 cl, 4 ex, 1 tbl
SUBSTANCE: method of determining iron (II) includes preparing a sorbent and an iron (III, II) solution; adding hydroxylamine solution to reduce iron (III) to iron (II) and extracting iron (II) from the solution with the sorbent; converting the iron (II) into a complex compound on the surface of the sorbent; separating the sorbent from the solution; measuring the diffuse reflection factor of the iron (II) surface complex and determining content of iron using a calibration curve. The sorbent used is silica which is successively modified with polyhexamethylene guanidine and 3-(2-pyridyl)-5,6-di(2-furyl)-1,2,4-triazine-5',5"-disulphonic acid (Ferene S), and the diffuse reflection factor is measured at 600 nm.
EFFECT: low detection limit and wide range of determined iron content.
SUBSTANCE: method includes pretreating a sample with an inorganic reagent and determining silicon using a spectrometric method based on a blue-coloured silicon-molybdenum complex followed by re-calculation for silicon dioxide, wherein the reagent used is 20% borofluorhydric acid and treatment is carried out at 70±2°C for 40 minutes.
EFFECT: high selectivity of analysis.
SUBSTANCE: claimed is reagent indicator truncated cone, which contains flow hollow profile, inside which sorbent with immobilised on it chromogenic reagents, is placed, with smaller base being input hole of truncated cone, overall dimensions of which are selected by the following dependences: ds = 0.25÷2.5, dl = (4÷50)·ds, ht.c = (8÷100)·ds, where ds and dl are diameters of smaller and larger bases of truncated cone, mm; ht.c is height of truncated cone, mm.
EFFECT: expressivity and increase of sensitivity of ion identification.
2 dwg, 8 ex
SUBSTANCE: in order to extract iron (III) from water solutions diphenylguanidine (DPG) is applied as the first organic reagent. As the second organic reagent, salicylic acid (SA) is applied, and as solvent of organic phase chloroform is applied. In organic phase complex with molar component ratio DPG: Fe3+:SA, equal 1:1:1, is extracted. Process of iron (III) extraction is carried out at medium acidity pH=1.5-2.5 with the following detection of iron (III) by trimetric method.
EFFECT: invention makes it possible to increase selectivity and simplify process of extraction and detection of iron from water solutions.
2 cl, 5 dwg, 1 ex
SUBSTANCE: invention relates to field of analytical chemistry, namely to express-detection of explosive substances (ES) based on organic peroxides. Method is based on fixation of hydroxen peroxide, released in the process of explosive substance decomposition by indicator method. For this purpose change of indicator colour is fixed within 1 minute after contact with solid-phase material, possessing function of surface acidity and providing decomposition of ES to hydrogen oxide. Application of claimed method simplifies analysis of cyclic peroxides due to reduction of the number of analysis stages, as well as to elimination of liquid reagents, including concentrated acids and organic solvents.
EFFECT: invention provides carrying out express-analysis of trace quantities of peroxide ES outside laboratory in wide range of climatic conditions.
6 cl, 2 tbl, 7 ex
SUBSTANCE: invention describes an indicator composition for the detection of disinfectants with an active substance based on quaternary ammonium compounds on surfaces of subjects and detection of disinfection completeness by aerosol spraying, which contains a 0.5-1.5% solution of trinitrotoluene in monoatomic alcohol, with propyl alcohol being applied as the monoatomic alcohol.
EFFECT: convenience and safety of application, increased term of working capacity and interval of application temperatures, protection of the environment, possibility of application at work on vertical, inclined and horizontal surfaces.
SUBSTANCE: indicator testing means for determining content of N-methylaniline in hydrocarbon fuels is neutral aluminium oxide with potassium ferricyanide immobilised on the surface thereof, moulded in form of pellets. The method of determining content of N-methylaniline in hydrocarbon fuels using said indicator testing means is carried out based on colour change thereof after coming into contact with a sample of the analysed sample.
EFFECT: reliability of determining lower concentrations of N-methylaniline in hydrocarbon fuels.
2 cl, 1 tbl, 2 ex
SUBSTANCE: invention relates to a fuel composition, which includes a polyalcohol nitrate, a phlegmatising agent and a stabiliser, wherein the phlegmatising agent used is a heterocyclic compound selected from a group of five-member heterocyclic compounds: 3,4,5-trimethylisoxazole, 3-methyl-5-propyl-1,2,4-oxadiazole, 3,4-dimethylfurazan, 3,4-dimethylfuroxane, 3-ethoxy-4-methylfuroxane, 3-propoxy-4-methylfuroxane, 3-butoxy-4-methylfuroxane, 3-amoxy-4-methylfuroxane, 3-isoamoxy-4-methylfuroxane, 3-cyclohexyloxy-4-methylfuroxane, 3-(2'-methoxyethoxy)-4-methylfuroxane, 3-(2'-ethoxyethoxy)-4-methylfuroxane or cyclohexyl nitrate with the following ratio of components, wt %: polyalcohol nitrate 35-75; phlegmatising agent 20-65; stabiliser 1-2. The invention also relates to a method of producing said fuel composition.
EFFECT: obtaining fuel with a low freezing point, which enables to use said fuel in cold winter conditions and in aerial torpedoes.
21 cl, 18 ex
SUBSTANCE: invention relates to a method of processing tall oil resin. The method of processing tall oil resin, which contains sterol alcohols, and, possibly, wood alcohols of fatty acids and resin acids, the source of which is tall oil, is characterised by the fact that, at least, a part of the fatty acids and resin acids is released from sterol ethers and ethers of wood alcohols and converted into lower alkyl ethers; alkyl ethers, obtained in he said way, are extracted by evaporation from resin, then condensed, with the further hydration of the obtained condensate. The product, obtained by the claimed method and the application of the method for fuel production are also claimed.
EFFECT: application of tall oil resin, which usually represents a waste product, for obtaining fuel or a fuel component.
17 cl, 1 dwg
SUBSTANCE: method of processing organic raw material into fuel includes thermochemical processing of raw material in fast pyrolysis reactor with further condensation of steam-gas mixture in condenser-refrigerator, separation of fractions of liquid hydrocarbons and fuel gas from it, with their further purification, characterised by the fact that temperature of steam-gas mixture is supported at the level 450-700°C on the way of its transportation from reactor to input into condenser-refrigerator, with steam-gas mixture being first condensed with hot water with temperature 0-65°C with ratio water:steam-gas mixture = 2÷1 - 3÷1; formed fuel gas is removed from condenser-refrigerator, re-cooled with separating water from it by water steam condensation, and supplied to fast pyrolysis; after filling reservoir of condenser-refrigerator with water and reduction of temperature to 65°C water with liquid fuel from light hydrocarbons is discharged from it, with resinous precipitate being dissolved by bioethanol with mixing by mixer for 30-40 min.
EFFECT: obtaining pyro-liquid with combustion heat 28-32, with obtaining pyrogas and realisation of dissolution of resinous substances.
5 cl, 4 ex
FIELD: oil industry.
SUBSTANCE: octane-increasing gasoline additive based on toluidine and alcohol comprises synergetic compound of mixture of meta- and ortho-toluidines, isobutyl alcohol and vegetable oil condensation product, diethanol amine and boracic acid at mole ratio of vegetable oil, diethanol amine and boracic acid components of 0.75 - 1:3:0.5 - 1 and the following ratio of components, wt %: meta-toluidine - 49-54, ortho-toluidine - 24-27, isobutyl alcohol - 16-22, condensation product - 3-5. The gasoline-based compound contains an octane booster that includes the above additive in quantity of 1-3 vol %.
EFFECT: developing octane booster and using additive with high antiknock properties in composition of gasoline-based compound, creating synergetic compound, production of qualitative additive that does not contain metalorganic additives and MMA.
2 cl, 6 tbl
SUBSTANCE: invention describes biofuel containing acetals and vegetable oils; the biofuel represents diethylformal 40-80 vol % and unsaturated fatty glycerides 20-60 vol %.
EFFECT: producing the biofuel characterised by a high cetane number, which alongside with improving the low-temperature and start-up properties of the fuel prevents corrosion; it requires no engine rework, possesses the green exhaust with considerable reduction of costs by using the ingredients based on cheap heavy accessible products.
FIELD: oil and gas industry.
SUBSTANCE: group of inventions is related to method of synthetic oil production out of greenhouse gases. The invention suggests the method of synthetic oil production out of gas containing CO2; synthetic oil produced by the above method, usage of synthetic oil as well as use of gas containing CO2 are specified in the suggested method. The method includes the following stages: gas delivery to the reactor containing culture of at least one species of microalgae capable of photosynthesis; photosynthesis using CO2; anaerobic fermentation of the received biomass; thermochemical decomposition of fermented biomass to receive synthetic oil mixed up with water and gas and separation of the produced synthetic oil. Upon photosynthesis stage from 5 up to 100% of the culture is removed from the reactor and divided into solid and liquid fraction. Solid fraction is subject to anaerobic fermentation stage. Carbonates and/or bicarbonates are separated from liquid fraction. Then liquid fraction less carbonates and bicarbonates is returned at least partially to the reactor.
EFFECT: inventions ensure large capture of CO2.
29 cl, 5 dwg, 11 tbl, 3 ex
SUBSTANCE: invention relates to a fuel composition for an injection diesel engine, which includes a basic amount of fuel and a minimum effective amount of a reaction product of (i) a hydrocarbyl-substituted compound containing at least one tertiary amine group, wherein the hydrocarbyl-substituted compound is selected from a group consisting of C10-C30-alkyl- or alkenyl-substituted amidopropyldimethylamines and C12-C200-alkyl- or alkenyl-substituted succinylcarbonyldimethylamines and (iii) halo-substituted C2-C8 carboxylic acid salts, wherein the obtained reaction product is substantially free of non-covalently bonded anionic substances. The invention also relates to a concentrate of the fuel additive for use in an injection diesel engine, as well as a method of improving performance of an injection diesel engine and a method of operating an injection diesel engine.
EFFECT: improved engine performance when an effective amount of the reaction product of compounds (i) and (ii) is added to fuel.
23 cl, 3 tbl
SUBSTANCE: invention relates to a composition of aircraft non-ethylated gasoline, which contains gasoline of catalytic reforming, alkylgasoline, toluene and an antiknock additive, and the composition additionally contains a gasoline fraction, boiling out in ranges of 62-85°C, and as the antiknock additive - monomethylaniline and methyltertbutyl ether with the following component ratio, wt %: alkylgasoline 15.0-25.0; toluene 10.0-20.0; gasoline fraction, boiling out in the range of 62-85°C, 20.0-35.0; monomethylaniline 1.5-3.0; methyltertbutyl ether 5.0-10.0; catalytic reforming gasoline - the remaining part.
EFFECT: reduction of the toxicity of the non-ethylated aircraft gasoline without the deterioration of exploitation properties, regulated by the GOST requirements 1012-72, with the simultaneous extension of the nomenclature of piston engines of internal combustion of the domestic and foreign production, using aircraft gasoline.
FIELD: oil and gas industry.
SUBSTANCE: oily wastes are heated and subjected to primary separation with the extraction of oil-contaminated water and mechanical impurities. The received partially dewatered oily wastes are mixed up with a diluter and subjected to repeated separation with the production of an oil concentrate and additional quantity of oil-contaminated water and mechanical impurities. The oil concentrate is subjected to fractioning together with vapours of gasoline and diesel fraction stabilisation as well as with vapours of thermal conversion, in result a sulphurous hydrocarbon gas, an unstable gasoline fraction, the diluter, an unstable diesel fraction and bottom fractions are obtained. The sulphurous hydrocarbon gas is treated from hydrogen sulphide with the receipt of a fuel gas and commercial sulphur. The unstable gasoline fraction is stabilised with the receipt of commercial gasoline and stabilisation vapours. The unstable diesel fraction is subjected to catalytic stabilisation by hydrogenation and stabilised with the receipt of commercial marine fuels and stabilisation vapours. The bottom fractions are subjected to thermal conversion with the receipt of vapours and heavy residue used as a power-generating fuel. Oil-contaminated water is treated with the receipt of partially clean water and oily wastes, which are sent for mixing up with a raw material, as well as oil-contaminated mechanical impurities, which are processed in the mixture with the oil-contaminated mechanical impurities received at previous stages into road-building materials.
EFFECT: method allows continuous treatment excluding the output of a non-commercial product, improvement of the quality of the commercial product, improvement of industrial and environmental safety, improved labour conditions; the method may be used in the oil refining industry for non-waste processing of emulsion and emulsion suspended oily wastes.
5 cl, 1 dwg
SUBSTANCE: invention relates to biofuel composition, based on petroleum product, containing bioadditive, based on acetals and vegetable oils, with composition representing mixture of petroleum Diesel fuel 98-60 vol % with bioadditive 2-40 vol %, where as bioadditive used is diethylformal 35-40 vol %, with the remaining part being represented by glycerides of unsaturated fatty acids.
EFFECT: obtaining biofuel higher-quality composition, more resistant to oxidation and polymerisation processes, with low prime cost and high product output.
2 cl, 2 tbl
SUBSTANCE: invention refers to a method for the one-stage production of (3-hydroxypropyl)naphthols of having a structure of R1=CH2CH2CH2OH, R2=OH, R3=H; R1=OH, R2=CH2CH2CH2OH, R3=H; R1=OH, R2=CH2CH2CH2OH, R3=CH2CH2CH2OH; R1=OH, R2=T-Bu, R3=CH2CH2CH2OH, effective biologically active substances of neutropic action. The method consists in conducting a reaction of α-, β-naphthols, their derivatives or their sodium salts with allyl alcohol and alkali at temperature 100-170°C. A purified product yield is 40-60%.
EFFECT: higher yield.