Method for obtaining hydrophobic oil sorbent
SUBSTANCE: method for obtaining an oil sorbent is proposed. Sodium silicate is sprayed onto the diatomite crumb pre-baked at a temperature of 600-800°C. After spraying the sodium silicate, the resulting product is placed in a polyethylene bag, sealed and held for 17 to 24 hours until the hydrophobic film is completely formed.
EFFECT: obtaining a cheap effective sorbent of oil products.
4 ex, 3 tbl
SUBSTANCE: invention can be used in industry at the stage of fine or additional purification of water from traces of heavy metal ions, in the purification of vapour condensate in boiler houses and TPP plants in the creation of closed technological water circulation. To realise the method of ion-exchange water purification sewage waters and technological solutions are passed through a sorbent, containing hydrazide groups. as the sorbent used is activated carbon, preliminarily processed with a gas mixture of ammonia and hydrazine, taken in volume ratios of 1:2-2.5, at a temperature of 350-450°C. The method provides the removal of ions of metals with a variable valence: Cu2+, Zn2+, Ni2+, Cr3+, Fe3+, as well as ions of metals: Bi3+, Zr4+, Sr2+, Co2+ from water, with the preservation by the sorbent of the sorption activity in a wide range of the water solution pH values.
EFFECT: purification of water from traces of heavy metal ions.
1 tbl, 1 ex
SUBSTANCE: invention refers to a moulded sorbent with the antibacterial properties for treating endometritis, representing nanodispersed mesoporous carbon having a specific adsorption surface of no more than 50 m2/g and a crushing strength of not less than 20 kg/cm2, containing polyvinylpyrrolidone in an amount of not less than 5.0%, characterised by the fact that it is presented in the form of cylinders 2-4mm in diameter, 15-25mm long with one inner circular passage, to a method of treating it, as well as to a method of treating endometritis.
EFFECT: higher clinical effectiveness.
3 cl, 10 ex, 2 tbl
SUBSTANCE: inert inorganic substrate is soaked with solution of lithium aluminium hydride in diethyl ether. Ether is removed by vacuuming and pyrolysis of lithium aluminium hydride, applied on substrate, is realised at temperature 100-500°C in vacuum.
EFFECT: obtaining sorbent, effective for purification of inert gases and reducing gases from admixtures of Lewis acids, hydrocarbons, oxygen or volatile oxides.
SUBSTANCE: claimed invention relates to application of hydrogen form of palladium-doped zeolite ZSM-5 for absorption of volatile organic compounds (VOC), formed from organic substance. Ratio Si:Al in zeolite ZSM-5 is lower or equals 100:1. Palladium-doped zeolite ZSM-5 is applied in the environment, including less than 10 volume % of oxygen.
EFFECT: improvement of absorption.
25 cl, 1 dwg, 1 tbl
SUBSTANCE: invention relates to analytical gas chromatography, particularly to methods of producing sorbents for analysing organic substances, including environmental pollutants. Disclosed is a method of producing a sorbent for gas chromatography, involving deposition of a binary composition, consisting of bis-(phenyl-arsinic)acid and β,β'-oxydipropionitrile, onto a solid Chromaton carrier.
EFFECT: invention enables to obtain a sorbent having high selectivity of separation of organic substances.
SUBSTANCE: invention can be used to improve membrane and sorption techniques, in water treatment, in techniques for recycling ions of heavy metals from aqueous solutions and waste water. The method is realised by contacting aqueous solutions for 1-20 minutes with cellulose-based polymer sorbents which are modified with microwave radiation with power of 300 W and frequency of 2.45 GHz, with solution/sorbent ratio of 50-200. The sorbents are modified by pre-immersion in aqueous caprolactam solution or caprolactam distillation residue with concentration of 2-20 g/l with modulus of 15-50, followed by pressing and microwave exposure for 1-5 minutes at temperature of 150-200°C. The modified sorbents are brought into contact with aqueous solutions at solution pH 3-7.
EFFECT: method increases degree of extraction of heavy metal ions from weakly acidic solution with pH below 5 by about 20%, while maintaining a high degree of extraction of heavy metal ions from neutral aqueous solutions, and also increases sorbent stability when stored on open air to one year and reduces the number of steps when modifying sorbents.
1 tbl, 5 ex
FIELD: process engineering.
SUBSTANCE: invention relates to synthesis of inorganic sorbents to be used in water treatment, radio-chemistry and processing if liquid radioactive wastes. Proposed method comprises processing of porous carrier selected from glass powder, active coal or silica gel by water suspension of sorption active insoluble compound selected from the group including nickel ferrocyanide, aluminium hydroxide and copper sulphide at ultrasound radiation of 50-200 W and 22-60 kHz and at temperature of 70-90°C.
EFFECT: mechanically active inorganic sorbents with high content of active substance.
3 tbl, 3 ex
SUBSTANCE: invention relates to techniques of producing sorbents for extracting silver from waste water and process solutions. The sorbent is obtained using a dispersion of fibrillated cellulose fibres as lead sulphide carriers. Lead sulphide is precipitated with sodium sulphide in an aqueous dispersion which contains lead acetate or nitrate and said fibres. A sorbent containing 50-300 pts.wt lead sulphide per 100 pts.wt fibre is obtained.
EFFECT: invention enables to obtain a sorbent with capacity of 300-675 mg silver per 1 g sorbent.
SUBSTANCE: invention relates to a method and apparatus for producing a sorbent, mainly for removing arsenic from drinking water. The method involves the following steps: saturating a water-absorbent wettable organic carrier material with an aqueous solution of a water-soluble iron salt, filtration thereof and drying to constant weight, saturating the carrier material with a stoichiometric amount of oxalic acid and/or a water-soluble salt of oxalic acid, followed by filtration thereof and drying to constant weight, with conversion of iron ions to a water-insoluble iron oxalate, converting the saturated carrier material to activated carbon by anaerobic heating, subjecting the saturated carrier material to anaerobic cooling with decomposition of iron oxalate to iron and carbon dioxide, pre-oxidation of iron particles of the activated carbon with a water-soluble peroxide compound, filtering the activated carbon and washing until complete removal of salt therefrom, followed by filtration and drying thereof once more, converting iron hydroxide formed on the surface of iron particles to magnetite by anaerobic heating of the activated carbon, followed by anaerobic cooling of the sorbent to room temperature.
EFFECT: invention provides efficient and cheap removal of arsenic.
20 cl, 1 dwg, 1 ex
FIELD: process engineering.
SUBSTANCE: invention relates to production of sorption and filtration materials for cleaning water from, mainly, manganese and iron. For production of sorbent, basalt fibers are used as a carrier. Said fibers are premixed in aqueous medium at mixing to sixes of 1 to 25 mm and chemically activated by inorganic acid. Said carrier is subjected to chemical treatment by bivalent manganese salt of concentration of 0.5 to 2%, medium pH is increased to 8 to 12 and hydrogen peroxide of concentration varying from 0.15 to 2% is added. Then, treated material is dried at 120-200°C and thermally treated at 250-350°C.
EFFECT: longer life, higher sorption capacity.
SUBSTANCE: invention relates to field of analytic chemistry. Carrier is modified with organosilicon compound, containing -SH or -NH2 group, is processed with colloid gold solution. After that, sulphur-containing organic compound is covalently fixed on the surface of gold nanoparticles.
EFFECT: claimed is method of obtaining separation material, containing silicon dioxide-based carrier and gold nanoparticles.
3 cl, 6 dwg
SUBSTANCE: biohybrid composite material for sorption and degradation of crude oil and petroleum products is proposed. The material is a thermoplastic polymer with fibre-forming properties - acrylonitrile copolymer with methyl acrylate. It comprises incorporated phosphorus-containing cationites and/or nitrogen-containing anionites, the cell walls of aquatic plants of the family Lemnaceae (Lemnaceae) and immobilized cells of bacteria-oil destructors.
EFFECT: composite material has high adsorption capacity and a higher degree of biodegradation of petroleum hydrocarbons.
SUBSTANCE: method includes coprecipitation at pH 8.9 of magnesium and aluminium hydroxides taken in molar ratio of 4:1, moulding the precipitate and granulating by drying. Successive modification with polyhexamethylene guanidine and 1,8-dioxynaphthalene-3,6-disulphonic acid is then carried out.
EFFECT: increased selectivity of the sorbent.
1 tbl, 1 ex
SUBSTANCE: invention relates to analytical chemistry, chemical engineering and environmental science. Disclosed is a method for group extraction of copper, zinc and cadmium, which includes sorption concentration of metals on amberlite IRA-400, modified with 2,7-bis-azo-derivative of chromotropic acid. The amberlite is modified with 3-[(4-antipyrine)azo]-6-[(2-carboxyphenyl)azo]chromotropic acid. After concentration, metals are desorbed with a 0.05 solution of a disodium salt of ethylendiaminetetraacetic acid at pH 10 and ratio of the volume of the solution to the mass of the sorbent of 5000:1.
EFFECT: invention enables to obtain analytical concentrations in tests for metals in field conditions.
1 dwg, 3 tbl
SUBSTANCE: device for the production of a sorbent contains a mixer 1, equipped with mechanical and pneumatic activation devices 7 and 8 and connected via main lines of components supply with reservoirs 2 and 3, filled with initial components: carbover and PSCM, and both the reservoirs are connected via dosers 6 with the mixer cavity 1, main line of the obtained composition 13 output into an accumulator 14, a device for fractioning and drying one initial component - carbover, a source of a compressed gas medium 11 and heater 12 of this medium.
EFFECT: improvement of the construction of the device for obtaining the sorbent, which makes it possible to produce the sorbent of a higher quality and more active as to its physical-chemical characteristics.
2 cl, 1 dwg
SUBSTANCE: invention relates to the field of materials science and analytical chemistry. A nanohybrid functional separation material contains gold nanoparticles covalently fixed on a carrier and covalently fixed sulphur-containing organic ligands on the surface of gold nanoparticles.
EFFECT: invention provides an increase of the separation material efficiency.
4 cl, 6 dwg, 4 ex
SUBSTANCE: mixing of sedimentary rock - diatomite, organic component - moisture-saturated waste active sludge and Portland cement is carried out. Mixture contains (wt %): diatomite -12-16, Portland cement 8-12, waste active sludge - the remaining part.
EFFECT: obtaining sorbent by simplified technology, effective for purification of waters from metal ions.
1 tbl, 3 ex
SUBSTANCE: invention relates to method of obtaining thin-layer chiral plates for planar chromatography of stereoisomers and their racemic mixtures, which includes non-covalent binding of glycopeptides antibiotic eremomycin with silica adsorbent with silicagel binding by method of impregnation in alkaline water solution with pH 8.0÷10.0 at room temperature in one stage.
EFFECT: increase of method efficiency.
2 cl, 3 tbl, 5 ex
FIELD: oil and gas industry.
SUBSTANCE: invention is related to processing of oily wastes. In the mixer a sorbent is prepared of unhydrated lime, inedible fat, sodium methylsiliconate and magnesium chloride. Oil-contaminated wastes are delivered to the mixer and stirred until indiscrete mass is received. Then water is supplied to the mixer for lime hydration, the mass is stirred till lime is hydrated completely. Upon lime hydration sodium bicarbonate is introduced on the basis of 4.2-7.5 kg/t of sorbent. The sorbent and wastes ratio is set on the basis of 2-4 kg of sorbent per 1 kg of oil products contained in wastes.
EFFECT: process intensification and increase in waste neutralisation degree.
SUBSTANCE: invention relates to sorbents for cleaning surfaces from hydrocarbon contaminants. The sorbent for cleaning and decontaminating wastes contaminated with oil products contains unslaked lime, industrial fat and sodium aluminomethylsiliconate, with the following ratio of components, wt %: industrial fat - 0.20-2.40, sodium aluminomethylsiloconate - 0.05-0.13 and unslaked lime - the balance.
EFFECT: improved decontamination of wastes contaminated with oil products owing to high strength of the hydrophobic coating on decontamination products.
SUBSTANCE: invention relates to nickel complex of 5,10,15,20-tetrakis [3',5'-di(2"-methylbutyloxy)phenyl]-porphin of formula
EFFECT: invention makes it possible to obtain nickel complex, demonstrating property of stationary phase for gas chromatography.