Method of composite fibrous adsorbent producing

FIELD: manufacturing technology.

SUBSTANCE: invention relates to carbonic adsorbents production. Described is method of composite fibrous adsorbent production, characterized by that initial components taken are hydrolyzed lignin and polyacrylonitrile, making their mixed at ratio of 80:20 by weight, this mixture is placed into pyrolysis reactor, performing its blowdown by nitrogen flow, after that, mixture is heated in pyrolysis reactor at rate of temperature raising of 15 deg.·min-1 until mixture temperature of 800 °C, maintaining this temperature for 0.5 hours, stopped heating and performing cooling of carbonized fibers to room temperature under nitrogen at rate of its flow of 50 cm3·min-1.

EFFECT: producing adsorbent based on wood processing wastes in large quantities, having higher heat resistance and strength.

1 cl

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to the field of obtaining a composite fibre based on hydrolytic lignin with polyacrylonitrile and can be used for the formation of pre-cursor composite fibres as an initial material for the formation of carbon fibres of increased strength and heat resistance. Finely disperse hydrolytic lignin is dissolved in dimethylsulphoxide until complete swelling at room temperature for 10-20 h and mixed with a solution of polyacrylonitrile in dimethylsulphoxide until a homogenous and moulding solution, containing 70-80 wt % of hydrolytic lignin, is formed. The solution is filtered, degassed, charged into the draw plate tank and supplied into the spinning bath of an installation for the preparation of composite fibres.

EFFECT: application of the invention ensures an increased value of utilised hydrolytic lignin, increased strength of the pre-cursor fibre to 50 MPa, increase of heat resistance to 30-40% at 800°C in comparison with 20% for pure hydrolytic lignin, improvement of production ecology.

1 ex

FIELD: chemistry.

SUBSTANCE: method of producing threads involves preparation of a chitosan solution, drawing viscose or caprone threads through said solution and drying. The chitosan is preliminarily swollen in water. Concentrated acetic acid is added while stirring in an amount equal to content of chitosan. Further, 10-40 vol. % ethyl alcohol is added to the obtained solution and then held for 22±2 hours at 22±2°C until complete maturation.

EFFECT: invention intensifies the dissolution process and shortens duration of stirring the mixture from 6-8 hours to 2-3 hours, reduces viscosity, accelerates the solvent evaporation process by 1,5 times, increases stability of formation and prevents sticking of threads and formation of defects.

4 ex

FIELD: paper.

SUBSTANCE: invention refers to the sphere of , more specifically concerning textile blankets used for papermaking. In case of the first variant of the invention implementation the textile blanket consists of multiple monofibres each of them having a that facilitates anchoring of the coating applied onto the blanket. In case of the second variant of the invention implementation the textile blanket consists of multiple bicomponent monofibers with the first component having at least a single the second component is inserted in, differing from the first one. In addition to that there are methods being suggested for manufacture of the monofibers the textile blanket is composed of and mechanical anchoring of the coating applied to the textile blanket.

EFFECT: manufacture of textile blankets with enhanced adhesive qualities and higher resistance to delamination of the coating applied onto the textile blanket.

32 cl, 8 dwg

FIELD: polymers.

SUBSTANCE: invention relates to technology for making molded articles made of biologically decomposing polymers. The composition for molding comprises biologically decomposing polymer and material preparing from marine plants and/or shells of marine animals, or at least two components taken among group consisting of saccharides and their derivatives, proteins, amino acids, vitamins and metal ions. The composition elicits good stability and ability for processing. Articles made of this composition show low capacity to fibrillation. Invention can be used in manufacturing package materials or fibrous materials - yarn, nonwoven or textile articles.

EFFECT: improved method for making, valuable properties of articles.

15 cl, 18 tbl, 3 dwg, 16 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the field of obtaining a composite fibre based on hydrolytic lignin with polyacrylonitrile and can be used for the formation of pre-cursor composite fibres as an initial material for the formation of carbon fibres of increased strength and heat resistance. Finely disperse hydrolytic lignin is dissolved in dimethylsulphoxide until complete swelling at room temperature for 10-20 h and mixed with a solution of polyacrylonitrile in dimethylsulphoxide until a homogenous and moulding solution, containing 70-80 wt % of hydrolytic lignin, is formed. The solution is filtered, degassed, charged into the draw plate tank and supplied into the spinning bath of an installation for the preparation of composite fibres.

EFFECT: application of the invention ensures an increased value of utilised hydrolytic lignin, increased strength of the pre-cursor fibre to 50 MPa, increase of heat resistance to 30-40% at 800°C in comparison with 20% for pure hydrolytic lignin, improvement of production ecology.

1 ex

FIELD: production of thermally- and fire-resistant textile materials, in particular, materials produced from mixture of thermally stable synthetic fiber and oxidized polyacrylonitrile fiber, which may be used for manufacture of protective clothing for rescuers, servicemen, firemen, oil industry workers, and gas industry workers, filtering fabrics for cleaning of hot gases from toxic dust in metallurgical, cement and other branches of industry, decorative materials, thermally-resistant isolation, and toxic asbestos substitutes.

SUBSTANCE: method involves mixing non-oxidized polyacrylonitrile fiber with thermally stable synthetic fiber in the ratio of from 30/70 to 80/20, respectively; subjecting resulting mixture in the form of yarn, tape, fabric to thermally oxidizing processing at temperature of 240-310 C during 10-180 min.

EFFECT: elimination of problems connected with textile processing of frangible oxidized polyacrylonitrile fibers owing to employment of elastic polyacrylonitrile fibers rather than such oxidized fibers.

2 cl, 7 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the field of obtaining a composite fibre based on hydrolytic lignin with polyacrylonitrile and can be used for the formation of pre-cursor composite fibres as an initial material for the formation of carbon fibres of increased strength and heat resistance. Finely disperse hydrolytic lignin is dissolved in dimethylsulphoxide until complete swelling at room temperature for 10-20 h and mixed with a solution of polyacrylonitrile in dimethylsulphoxide until a homogenous and moulding solution, containing 70-80 wt % of hydrolytic lignin, is formed. The solution is filtered, degassed, charged into the draw plate tank and supplied into the spinning bath of an installation for the preparation of composite fibres.

EFFECT: application of the invention ensures an increased value of utilised hydrolytic lignin, increased strength of the pre-cursor fibre to 50 MPa, increase of heat resistance to 30-40% at 800°C in comparison with 20% for pure hydrolytic lignin, improvement of production ecology.

1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to woodworking industry and may be used for making slats. Said composition includes for inner layer 10-40% of rotten blank waste chips and 20% of wastes after roundup lumber chips as well as 40-70% of chips produced from pulp chips of PS grade with the help of binder based on low-molecular urea-formaldehyde resin and emulsion. Note here that said binder consists of low-molecular urea-formaldehyde resin of 60-62% concentration and aqueous solution of ammonia chloride of 20% concentration. Emulsion consists of the following components, in wt %: paraffin - 21, brown coal wax - 14, emulsifier - 1, water - 64.

EFFECT: lower material input, power savings, higher efficiency of equipment, lower toxicity.

1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: lignocellulose biomass is fed at first pressure and first temperature. The biomass includes a first solid fraction which contains insoluble lignin and a first liquid fraction which contains soluble C6 saccharides, and soluble lignin. Before said phased feeding, at least part of the C6 saccharides is removed from the biomass by fractionation. The first biomass pressure is lowered to a second pressure while virtually simultaneously lowering the first biomass temperature to a second temperature. Virtually simultaneous reduction of second pressure and second temperature to third pressure and third temperature is carried out to deposit soluble lignin into the first liquid fraction. A mixture is formed, which contains a second solid fraction which contains insoluble lignin, and deposited lignin, as well as a second liquid fraction which contains soluble C6 saccharides. The invention enables to obtain a lignin product with small particles for improving combustion efficiency and preventing typical problems of equipment clogging and high degree of energy recovery.

EFFECT: reduced clogging of equipment with lignin when processing lignocellulose biomass.

29 cl, 1 dwg, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a mixture of graft copolymers for use as an additive in chemical materials, as well as in development, exploitation and integration of underground deposits of oil and natural gas and in case of deep wells. The mixture of graft copolymers contains at components, at least one representative of brown coal, brown coal coke, lignite and a brown coal derivative, at least one representative of natural polyamides and different vinyl-containing compounds. The grafting base is selected from at least one representative of brown coal, brown coal coke, lignite and a brown coal derivative such as tannin and/or such a polyphenol derivative as lignosulphonate, or a polyamide component. Suitable polyamide components are natural polyamides, preferably caseins, gelatins and collagens, bone glues, blood albumins, soya proteins and products of splitting thereof, which are formed via oxidation, hydrolysis or depolymerisation, as well as mixtures thereof. The grafting component used is representatives of brown coal, brown coal coke, lignite, a brown coal derivative and natural polyamides, as well as vinyl-containing compounds in their O-, S-, P- and N-forms and styrenes, which can be in sulphonated form, or as a graft product. The graft product is obtained by grafting a vinyl-containing compound to at least one representative of natural polyamides or mixtures thereof, or grafting a vinyl-containing compound to at least one representative of brown coal, brown coal coke, lignite and a brown coal derivative. Graft copolymers with preferred molecular weight are used as a mixture, particularly in chemical construction materials and during development, exploitation and integration of underground deposits of oil and natural gas and in case of deep wells or as an additive for compositions containing hydraulic binding substances, as a water-retaining agent and/or liquefier.

EFFECT: graft copolymers have excellent resistance to salt and temperature and are also water-soluble and/or biodegradable.

17 cl, 2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to acetylation of peat derivatives and can be used in production of plastic mass. The peat esterification method involves mechanical treatment of peat with sodium hydroxide while grinding in a planetary mill AGO-3, followed by esterification with acetic anhydride at 80-100°C for 2-8 hours.

EFFECT: broadening the raw material base using peat in chemical processing by acetylation, cutting consumption of reactants and duration of the process.

3 tbl

FIELD: chemistry.

SUBSTANCE: drilling agent is obtained by treating lignosulphonate with sulphuric acid and alkaline metal bichromate to pH 1-1.5, followed by partial neutralisation with sodium hydroxide to pH 4-5 and drying. During treatment, elementary sulphur is fed into the reaction zone in amount of 0.8-1.2 wt % of the weight of the lignosulphonate.

EFFECT: invention enables to obtain a drilling agent with high quality factors, avoid contamination of waste water with hexavalent chromium compounds.

1 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a wood-plastic composition for making fire-resistant products. The composition contains cellulose fibre, thermoplastic polymer material, binder, flame-retardants and an adjuvant. The fire-resistant product is made from the composition by mixing cellulose fibre with the thermoplastic material at temperature and pressure sufficient for binding. An effective amount of at least one flame-retardant, at least one binder and at least one adjuvant is then added. The obtained crude product is then moulded and cooled.

EFFECT: obtained fire-resistant product has higher water extraction resistance, strength and modulus of elasticity, as well as high fire-resistance, which enables its use on the boundary between a construction site and a natural zone.

10 cl, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: method involves plastification with extrusion of dispersion components, and specifically cellulose filler and thermoplastic polymer matrix. The thermoplastic polymer matrix consists of high-density polyethylene, a compatibiliser in form of graft polyolefin and a lubricant. The lubricant used is pre-ozonised polyethylene homologues in form of super-molecular polyethylene, low-density linear polyethylene and ethylene vinylacetate in ratio of 1:3:5. The graft polyolefin used in the compatibiliser is high-density polyethylene to whose molecular structure glycidyl methacrylate is grafted. Use of such a compatibiliser increases energy compatibility of dispersion components used in preparing a cellulose-containing polymer super-concentrate. The composite material contains a polymer and a super-concentrate with 30-70 wt % content of the super-concentrate.

EFFECT: composite materials based on the obtained cellulose-containing polymer super-concentrate have good physical and mechanical characteristics, namely strength and water resistance.

6 cl, 1 tbl, 3 ex

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of vegetable lignocelluloses raw material to produce plate construction materials to be used in construction and furniture production. Vegetable lignocelluloses raw material with high content of lignin and hemicelluloses is treated for 15 s - 10 min by water steam at not over 1 MPa and 150-250°C. Treatment by water steam is instantly terminated. Said vegetable lignocelluloses raw material thus treated is mixed with untreated fibrous vegetable lignocelluloses raw material. Content of vegetable lignocelluloses raw material treated by water steam in produced mix makes 2-60 wt %. Produced mix is formed into mats. Water is extracted from said mats. Vegetable lignocelluloses raw material treated by water steam can be dried to moisture content of 5-10%. Resultant matter is mixed with untreated vegetable lignocelluloses raw material. Mats are produced from obtained mix and subjected to hot pressing. To produced solid plate material.

EFFECT: lower production costs.

5 cl, 3 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of plate materials based on cellulose-containing particles impregnated with glue base on carbamide-formaldehyde resin to be used woodworking industry. Cellulose-containing particles are mixed with glue based on carbamide-formaldehyde resin and acid solidifier. Said cellulose-containing particles represent flax boon. Note here that said glue comprises additionally modifier butanol-1 in amount of 1.4…1.6% of carbamide-formaldehyde resin weight.

EFFECT: production of new structural material with increased physical and mechanical properties.

1 cl, 2 tbl, 2 dwg

FIELD: composite materials.

SUBSTANCE: invention relates to production of composite materials from ground wood stock, e.g. sawdust, and can be used to manufacture environmentally safe slab materials used in construction, furniture industry, and in fabrication of wood fuel briquets. Process according to invention consists in initially preparing composition of wood filler and binder followed by forming mat further subjected to hot compaction. In particular, wood filler is mixed with binder at softening temperature of binder (130-140°C), which binder is a mixture of partially hydrolyzed suberin and suberic acid obtained through hydrolysis of divided birch bark in presence of sodium hydroxide at 85-87°C. Hot compaction of formed mat is effected at 130-140°C and pressure 10-13 MPa (for 20-40% of binder).

EFFECT: improved strength and waterproofness characteristics.

2 cl, 1 tbl

FIELD: woodworking.

SUBSTANCE: invention is related to the field of composite materials on the basis of lignocellulose materials, in particular to press-compositions, and may be used in wood processing and construction. Composite material is produced from binder - acetylated wood of aspen with additional introduction of additive - powdery inorganic substance from the following group: Al, AlCl3*6H2O, Al(OH)3, at the following weight ratio of components, wt %: Lignocellulose binder - from 30 to 70, additive - the rest.

EFFECT: invention assists in increase of composite materials compositions, increase of strength, heat resistance and water resistance of composites.

4 ex, 2 tbl, 3 dwg

FIELD: agriculture.

SUBSTANCE: adjuvant composition contains in per cent by weight of the adjuvant compositions: (a) from 1 to 30 per cent by weight of betaine spreader-sticker corresponding to formula (I): , where: R1 represents alkyl, alkenyl or alkylmidoalkyl and R2 and R3 are each independently (C1-C6) alkyl or hydroxy (C1-C6) alkyl; (b) from 1 to 90 per cent by weight of humectant selected from ethylene glycol, propylene glycol, polyethylene glycol, glycerin, high fructose corn syrup, imelassy sorbitol and mixtures thereof, and (c) from 15 to 70 per cent by weight of water. Pesticide composition additionally contains an effective amount of a pesticide. Method of processing of the target plants includes applycation of pesticide composition on the plant.

EFFECT: invention allows to increase the stability of the composition.

12 cl, 4 tbl, 20 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of plate materials based on cellulose-containing particles impregnated with glue base on carbamide-formaldehyde resin to be used woodworking industry. Cellulose-containing particles are mixed with glue based on carbamide-formaldehyde resin and acid solidifier. Said cellulose-containing particles represent flax boon. Note here that said glue comprises additionally modifier butanol-1 in amount of 1.4…1.6% of carbamide-formaldehyde resin weight.

EFFECT: production of new structural material with increased physical and mechanical properties.

1 cl, 2 tbl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of vegetable lignocelluloses raw material to produce plate construction materials to be used in construction and furniture production. Vegetable lignocelluloses raw material with high content of lignin and hemicelluloses is treated for 15 s - 10 min by water steam at not over 1 MPa and 150-250°C. Treatment by water steam is instantly terminated. Said vegetable lignocelluloses raw material thus treated is mixed with untreated fibrous vegetable lignocelluloses raw material. Content of vegetable lignocelluloses raw material treated by water steam in produced mix makes 2-60 wt %. Produced mix is formed into mats. Water is extracted from said mats. Vegetable lignocelluloses raw material treated by water steam can be dried to moisture content of 5-10%. Resultant matter is mixed with untreated vegetable lignocelluloses raw material. Mats are produced from obtained mix and subjected to hot pressing. To produced solid plate material.

EFFECT: lower production costs.

5 cl, 3 ex

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