25 results about "Lignin" patented technology

The invention provides a preparation method of polyacrylonitrile-based hollow carbon fibers. Lignin and polyacrylonitrile are dissolved in a solvent for defoaming at 25-80 DEG C, the obtained spinningsolution is sprayed into coagulation bath through a circular spinneret plate, hot-drawing is performed in pure water, hollow primary fibers are obtained, and the polyacrylonitrile-based hollow carbonfibers are obtained after water washing, drying, pre-oxidation and carbonization. The method has the advantages of having good separation and adsorption effect for medium and large molecules, good solvent resistance and long service life.

The invention discloses a concrete high-efficiency water reducer. The water reducer comprises the following raw materials in parts by weight: 20-40 parts of unsaturated alcohol-polyoxyethylene ether,10-30 parts of sodium lignin sulfonate, 10-20 parts of acrylic acid, 5-10 parts of modified starch, 3-8 parts of aloe gel, 2-6 parts of cyclodextrin, 2-5 parts of cross-linked povidone, 2-5 parts of zinc gluconate, 1-3 parts of sodium polystyrenesulfonate, 1-3 parts of sodium alginate, 0.5-2 parts of graphene oxide, 0.2-1 part of sodium silicate, 0.1-0.5 part of a defoaming agent and 3-5 parts ofan initiator. The high-efficiency water reducer prepared by the method is good in stability, and can increase workability of concrete when used in the concrete. In addition, the water reducer can be mixed with other water reducing agents for use, the water adding amount is reduced, the solidification time of concrete is shortened, and strength of the concrete is improved.

The invention discloses a method for refining a high-temperature wood hydrolyzate. The method comprises the following steps: performing centrifugation on a raw material hydrolyzate; removing the water-soluble macromolecular lignin by a flocculation method; obtaining the hydrolyzate after flocculation, adsorbing the water-soluble small molecule lignin with the resin, and obtaining a purified xylosesolution; removing residual lignin of the purified xylose solution by a filtering device to obtain refined xylose liquid and prepare xylose; and eluting the resin-adsorbed lignin with an eluting solvent, and recovering the eluting solvent and lignin. The recovered ethanol of the invention can be recycled and reused; an integrated vortex reactor is also used to effectively improve and increase theflocculation effect, and the ion exchange resin as an adsorbent has a good adsorption effect on the charged lignin. The hydrolyzate improves the membrane separation effect of a filter membrane and maintains a large flux of the membrane.

The invention relates to a lead paste of a lead acid storage battery with a long service cycle. The lead paste comprises a negative electrode lead paste and a positive electrode lead paste, wherein the negative electrode lead paste is prepared from the following raw materials in parts by weight: 100 parts of lead powder, 10 to 12 parts of sulfuric acid, 10 to 12 parts of deionized water, 2 to 5 parts of lignin sodium sulfonate, 0.1 to 1 part of lignin fiber, 0.4 to 0.8 part of gallic acid, 1 to 3 parts of aerosil, 1 to 6 parts of colloidal graphite powder, 1 to 4 parts of barium sulfate, and 0.2 to 0.6 part of oak powder; the positive electrode lead paste is prepared from the following raw materials in parts by weight: 100 parts of lead powder, 10 to 12 parts of sulfuric acid, 10 to 12 parts of deionized water, 4 to 8 parts of red lead, 1 to 3 parts of carboxymethylcellulose, 0.1 to 1 part of lignin fiber, 0.4 to 0.8 part of magnesium sulfate, and 1 to 3 parts of aerosil. A storage battery prepared by the lead paste has the advantages that the initial capacity is high, the cycle life is long, the charging speed and discharging speed of the lead acid battery are accelerated, and the service life of the lead acid battery is prolonged.

The invention discloses a fireproof door core. The fireproof door core is prepared from, by weight, 7-12 parts of light calcined magnesia, 20-35 parts of expanded perlite, 15-23 parts of bentonite, 13-21 parts of desulphurization gypsum, 4-8 parts of chopped fiber, 1-2 parts of foaming agent, 11-16 parts of fly ash, 4-8 parts of lignin, 0.5-1 part of expansible graphite, 0.2-0.4 part of zinc borate, 2-7 parts of modifier and an appropriate amount of water. The fireproof door core has the advantages of being excellent in fireproof performance, good in heat preservation performance, environmentally friendly and small in volume, and not generating toxic and harmful gas under fire.

A highly water-retaining water-permeable brick prepared from a building recycled material and a preparation method thereof are disclosed. The brick comprises, by mass, 30-50 parts of a recycled fine aggregate, 30-50 parts of reclaimed sand, 1-3 parts of waste paper pulp, 2-5 parts of activated fly ash, 15-30 parts of Portland cement, 2-5 parts of an adhesive, 0.3-1 part of a composite water retention material, 0.2-0.5 part of lignin fiber, 0.5-1 part of industrial waste acid residue, 0.5-1 part of a water reducing agent, 0.5-3 parts of mineral pigment, 0.3-0.5 part of a water permeability agent and 10-20 parts of water. The water absorption and water retention properties of the brick are improved, raw materials are environmentally friendly and easily available, and a preparation process issimple.

The invention discloses organic fertilizer for improving soil. The organic fertilizer is prepared from the following raw materials in parts by weight: 50 to 60 parts of clay, 20 to 26 parts of ammoniated lignite, 16 to 21 parts of beef bone powder, 14 to 18 parts of wheat bran, 26 to 31 parts of soybean meal, 17 to 22 parts of refined bentonite, 10 to 14 parts of turf, 30 to 45 parts of water hyacinth, 11 to 15 parts of lignin, 9 to 13 parts of humic acid, 16 to 20 parts of calcium, magnesium, phosphorus and potassium fertilizer, 7 to 9 parts of zinc oxide, 7 to 9 parts of calcium chloride, 7 to 9 parts of ammonium chloride, 12 to 16 parts of urea, 13 to 18 parts of ferrous chloride and 4 to 8 parts of brassinolide. After the organic fertilizer for improving the soil, disclosed by the invention, is applied to a sand land, the soil can be improved after the organic fertilizer permeates into the land; meanwhile, nutrients of the fertilizer are slowly absorbed by crops and the organic fertilizer has the advantages of remarkable soil improvement effect, promotion of growth of the crops, greenness and environment protection.

The invention discloses a sealing adhesive used for automobile part changing. The sealing adhesive consists of the following raw materials in parts by weight: 35 to 45 parts of natural rubber, 18 to 26 parts of EPDM rubber, 6 to 8 parts of paraffin oil, 7 to 9 parts of atomizing carbon black, 0.8 to 1.2 parts of sulfur, 5 to 7 parts of a ceramic micro powder, 6 to 8 parts of lignin, 6 to 8 parts of nanosilicon dioxide, 1.1 to 1.4 parts of an anti-aging agent, 9 to 12 parts of a softening agent, 5 to 7 parts of polyethylene glycol, 4 to 6 parts of dimethyl silicone, 1 to 2 parts of polyurethane, 2 to 4 parts of linear polyethylene, 3 to 6 parts of triallyl isocyanurate, 1 to 4 parts of dicumyl peroxide, 1 to 3 parts of a lubrication dispersing agent, 4 to 6 parts of zinc oxide and 5 to 7 parts of sodium silicate. The sealing adhesive has the beneficial effects that firstly, the sealing adhesive is high in lubricating property, high in heat resistance and high in aging resistance, the twisting force is prevented from being increased to cause twisted fracture in the assembling process, and the service life is long; secondly, the sealing adhesive is high in processing safety, high in elasticity, stable in colloid chemistry performance, good in sealing effect, sturdy and durable, high in adhesive property and unlikely to cause sun cracks and falling.

The invention relates to a preparation method of flexible hydrophobic reversible photochromic wood and wood prepared thereby, and belongs to the field of wood manufacturing. The method comprises the following steps: removing lignin of a wood sample by using alkali liquor, then immersing the wood sample into an ethanol solution of a spiro-oxazine photochromic compound; blending epoxy resin crystalglue and hard glue, injecting the blend into a polytetrafluoroethylene mold, placing the glue layer on a plant leaf with a natural super-hydrophobic property, carrying out vacuum constant-temperaturestanding for 12-24 hours, and taking down the leaf to obtain a polytetrafluoroethylene mold with a reverse super-hydrophobic structure; blending epoxy resin crystal glue and flexible glue, injecting the blend into a mold, putting a wood sample on the glue surface, removing bubbles in the glue solution and ethanol molecules in the wood sample, standing for 12-24 hours at a constant temperature, andpeeling off the wood sample from the mold to obtain the flexible hydrophobic reversible photochromic wood. Raw materials used in the method are environmentally friendly, the method is simple, reaction conditions are mild, and various shapes can be customized according to use requirements.

The invention discloses a microwave-assisted large-scale preparation method of carbon nanospheres from lignin. The method comprises the steps of uniformly mixing the lignin with silicon carbide, and putting a mixture in a microwave tubular reactor; introducing nitrogen into an inlet of the microwave tubular reactor to discharge air in a reaction system, connecting outlet gas of the microwave tubular reactor with a cold hydrazine system, enabling nitrogen to pass through dichloromethane to enable the nitrogen to carry dichloromethane, and introducing the nitrogen carrying the dichloromethane into the microwave tubular reactor; under the condition of ensuring that nitrogen carrying dichloromethane is introduced, the microwave tubular reactor is started to carry out reaction, taking the mixture of lignin carbon and silicon carbide from the microwave tubular reactor after the reaction is finished, putting the mixture into water or ethanol, performing uniform stirring and standing, taking out lignin carbon floating on a liquid, and performing drying to obtain a solid product, namely the carbon nanospheres. The method is beneficial to the turning of waste lignin resources into wealth, and the high-valued utilization is realized.

The invention discloses an achromobacter sp. for degrading lignin and application of the achromobacter sp. in lignin-containing wastewater treatment, and relates to the technical field of industrial wastewater treatment. The achromobacter sp. CCZU-WJ6 for degrading lignin is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number of the achromobacter sp. is CGMCC NO.19017. The strain can be applied to degradation of industrial lignin-containing wastewater, and particularly, when the lignin-containing wastewater is degraded, the applicable degradation culture conditions are as follows: the temperature is 20-40 DEG C, the pH value is 4-9, and the concentration of treated lignin is greatly reduced. Compared with the traditional method, thestrain and the application method of the strain have the advantages of high treatment efficiency, wide application range, simple operation, low equipment requirement and obviously reduced operation cost, and solve the problems of complex procedure and carbon source requirement in fungus treatment of industrial lignin-containing wastewater.

The invention discloses an environment-friendly degradable plastic and a preparation method thereof. The degradable plastic comprises the following components in parts by weight: 55-70 parts of poly (butylene adipate-co-terephthalate), 10-20 parts of polypropylene carbonate, 10-15 parts of modified lignin, 5-6 parts of montmorillonite, 3-4 parts of a compatibilizer, 0-1 part of a lubricant and 0-1 part of a light stabilizer. The environment-friendly degradable plastic belongs to an environment-friendly material, the main raw materials are degradable materials, the auxiliaries are nontoxic, harmless and environment-friendly, the degradable plastic can be fully degraded under the composting condition, the environment-friendly degradable plastic provided by the invention belongs to blending type degradable plastic, and the modified materials such as polypropylene carbonate, modified lignin and montmorillonoid are doped, so that the environment-friendly degradable plastic can be fully degraded under the composting condition. The thermal stability, the gas barrier property, the breaking strength and the elasticity of the pure poly (butylene adipate/terephthalate) material are improved, so that the comprehensiveness is greatly improved, and the pure poly (butylene adipate/terephthalate) material can be applied to various use occasions.

The invention provides hard carbon microspheres as well as a preparation method and application thereof. In order to solve the problems of low initial coulombic efficiency and poor rate capability of the existing hard carbon negative electrode material for secondary batteries, the invention provides novel hard carbon microspheres which are obtained by co-carbonizing at least two hard carbon precursors, wherein the hard carbon precursors are two or more of water-soluble phenolic resin, glucose, cane sugar, starch and lignin. The hard carbon microspheres have better sphericity, larger interlayer spacing, extremely low specific surface area and excellent conductivity. The material is used for sodium ion batteries and has high reversible capacity, high initial coulombic efficiency and good rate capability. The preparation method is simple, the cost is low, the diameter range of the microspheres is controllable, and large-scale industrial production can be realized.

The invention relates to a filter material used for sewage treatment and particularly relates to a high-efficient composite filter material prepared by blending melt-blown polypropylene with modified pseudo-boehmite and used for sewage treatment and a preparation method thereof. The filter material is prepared from following raw materials, by weight: 1-2 parts of manganese sand in 200-300 meshes, 15-18 parts of micro powder of pseudo-boehmite in 200-300 meshes, 30-35 parts of polypropylene, 1-2 parts of a titanate coupling agent, 0.4-0.5 parts of sodium lignin sulfonate, 1-2 parts of polyether-modified silicone oil, 8-10 parts of nano bamboo charcoal powder, 1-2 parts of yttrium sol being 8-10% in solid content, 0.01-0.02 parts of lanthanum-series rare earth salt and 30-40 parts of water. In the invention, the modified pseudo-boehmite-based composite micro powder is supported onto the modified polypropylene master batch melt-blown filaments to prepare the filter material having a stereoscopic network structure. The filter material is excellent in purification effect, is stable and high-efficient in performances, is changeable in shape, is not liable to damage and can be used repeatedly.

The invention discloses a natural antibacterial eugenol microcapsule and a preparation method thereof. A shell material of the natural antibacterial eugenol microcapsule is a composite shell material consisting of polyurethane and alkali lignin, a core material of the natural antibacterial eugenol microcapsule is eugenol, and the eugenol-encapsulated microcapsule is prepared through a Pickering emulsion method and interfacial polymerization. The shell material is an isocyanate-based polymer raw material which is wide in source, low in cost and easy to obtain, and the core material eugenol is a natural volatile oily substance and has broad-spectrum and high-efficiency antibacterial performance. The microcapsule prepared by the invention is micron-sized, has higher sphericity and has higher eugenol encapsulation efficiency. The natural antibacterial eugenol microcapsule disclosed by the invention has a potential long-acting antibacterial effect through slow release of eugenol. Microencapsulation of eugenol changes eugenol into a solid powder structure from a liquid state, and the eugenol microcapsule has wide application potential in application of antibacterial materials and packaging materials.

The invention discloses a bio-based concrete workability regulator and a preparation method thereof. The bio-based concrete workability regulator comprises the following components in parts by weight: 30-50% of glycerol, 20-40% of a lignin derivative, 10-15% of reducing sugar, 1-3% of water-soluble polyvinyl alcohol, 1-5% of unsaturated anhydride, 0.5-1.5% of polyisocyanate, 1-4% of unsaturated carboxylic acid, 2-6% of an unsaturated sulfonic acid derivative and 0.8-3% of an initiator. According to the invention, bio-based macromolecules are adopted as raw materials, the use ratio of chemical raw materials is reduced, a plurality of action sites and cross-linked structures are formed by using a polyhydroxy structure and polyfunctionality of natural polymer derivatives, the coating capacity of slurry to aggregate is improved, concrete coating is improved, the segregation and bleeding phenomena of concrete can be effectively improved, the concrete flowability is not influenced, obvious air entraining and retarding side effects are avoided, and the acting effect is lasting and stable.