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72results about How to "Improvement" patented technology

Method for preparing lignin urea-formaldehyde pesticide microcapsule

The invention discloses a method for preparing a lignin urea-formaldehyde pesticide microcapsule. According to the invention, the method comprises the following steps: taking modified lignin, formaldehyde and urea as a monomer, forming a water-soluble performed polymer under base catalysis, diluting and forming continuous phase, forming dispersed phase by pesticide, an organic solvent and a surfactant, mixing and stirring the continuous phase and the dispersed phase to form an oil-in-water emulsion, performing in situ condensation polymerization under the acidic condition, heating and solidifying, pumping filtration and washing, drying to obtain the solid microcapsule particles. The modified lignin is obtained by formaldehyde hydroxymethyl modification of the industrial grade wheat straw soda lignin. According to the invention, the waste wheat straw soda lignin in paper industry is taken as the main wall material, so that the production cost of the microcapsule can be effectively reduced and the resource utilization of waste biomass can be realized. The preparation method of the invention has the advantages of simple process, rapidity and controllable microcapsule particle size, and is capable of realizing the industrial production, increasing the pesticide utilization rate, prolonging the persistent period, minimizing the environmental pollution in the process of agriculturalproduction, reducing the agriculture production cost and the like, and has good market prospect.
Owner:SOUTH CHINA AGRI UNIV

Method for modifying straw biochar for remediating heavy metal contaminated soil

The invention relates to a method for modifying straw biochar for remediating heavy metal contaminated soil. The method comprises the following steps: (1) feeding crop straw as a biochar raw materialto a drying oven, and smashing and sieving the crop straw to obtain powdery crop straw; (2) weighing the crop straw, placing the crop straw in a box-type atmosphere furnace, introducing nitrogen to keep an anaerobic condition, performing programmed heating to a target temperature, and keeping the final temperature for pyrolysis for 2-4 h to obtain original biochar; (3) repeatedly washing the biochar with deionized water to be neutral and drying the biochar; (4) weighing the straw biochar, soaking the straw biochar in 30% sodium hydroxide and performing stirring; (5) repeatedly washing the straw biochar with deionized water, and placing the straw biochar in the drying oven to obtain the target product, namely, alkali modified biochar. The crop straw subjected to reduction and harmless treatment can effectively immobilize heavy metal pollutants after being added to the heavy metal contaminated soil, durable and stable remediation effect is realized, secondary pollution is avoided, and the biochar is an ideal low-cost remediation agent for the heavy metal contaminated soil.
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI

Nitrogen fertilizer immobilization process using active soil and flocculant/adsorbent composite material

The invention discloses a nitrogen fertilizer immobilization process using an active soil and flocculant/adsorbent composite material. Attapulgite clay is chemically modified by irradiation to improve dispersibility and can form a multilayer micro-/nano-scale network structure by self-assembly in a water-poor environment under the action of flocculants, the adsorbed nitrogen fertilizer together with the non-adsorbed nitrogen fertilizer is embedded inside the network structure by use of biological carbon with high adsorbability, so that the nutrients of the nitrogen fertilizer are effectively stored in the network structure to prevent free migration of the nutrients and control the loss of the nutrients to the environment. The process can effectively reduce the migration and loss of nitrogen elements, increase the utilization efficiency of chemical fertilizers and reduce the environmental pollution caused by the loss of nitrogen elements. The process can achieve the effects of reducing the discharge of fertilizers, increasing the utilization efficiency of nitrogen fertilizers, reducing the consumption of chemical fertilizers, protecting the environment, reducing the cost and simplifying the process, and is significant in controlling eutrophication non-point pollution of water bodies and protecting the ecological environment.
Owner:安徽帝元生物科技有限公司

Microcapsule-embedded bread preservative and preparation method thereof

The invention relates to the technical field of food additives, and especially relates to a microcapsule-embedded bread preservative and a preparation method thereof. The microcapsule-embedded bread preservative is composed of the following materials in percentage by weight: 25-80% of wall materials, and 20-75% of preservative core materials; and the preservative core materials are embedded by the wall materials. The wall materials comprise at least one material selected from the following materials: distilled glycerol monostearate, sorbitan monooleate, hydrogenated vegetable oil, monoglyceride laurate, diacetyl tartaric acid esters of mono- and di-glycerides, polyglycerol fatty acid ester, sodium stearyl lactate and calcium stearyl lactate. The preservative core materials comprise the following raw materials in parts by weight: 20.5-65 parts of preservatives, and 10-40 parts of acidity regulators. The synergistic effects of the acidity regulators are made full use of in the microcapsule-embedded bread preservative, so that the freshness keeping effects of the monomer preservatives are thereby improved; moreover, the influence of the preservatives and the acidity regulators on yeast fermentation is reduced by adopting the embedding technology. In addition, emulsifiers are main components of the wall materials, so that the microcapsule-embedded bread preservative also has improvement effects on dough.
Owner:GUANGDONG GUANGYI TECH IND

Weather resistance detection device for outer wall test piece

The invention provides a weather resistance detection device for an outer wall test piece and belongs to the technical field of measurement. The weather resistance detection device solves the technical problems that existing weather resistance detection devices for the outer wall test piece cannot perform system detection simultaneously on wind pressure resistance and the environment of heat/rain and the like, so that detection data are not comprehensive enough and development of an outer wall is influenced, and the like. The weather resistance detection device for the outer wall test piece comprises an environmental box and a frame for fixing the outer wall test piece. The side of the environmental box is provided with an inlet, a heating system enabling the temperature in the environmental box to rise and a refrigerating system enabling the temperature in the environmental box to be lowered are arranged in the environmental box, a spraying system is further arranged in the environmental box and comprises a plurality of spray heads, water outlets of the spray heads are towards the inlet, and a control system capable of controlling the heating system, the refrigerating system and the spraying system is further arranged at the position of the environmental box. The weather resistance detection device has the advantages that the environmental box can simulate various natural environments through the heating system, the refrigerating system, the spraying system and a fan, and detection is comprehensive.
Owner:FANGYUAN CONSTR GRP REAL ESTATE DEVT CO LTD

Method for co-production of feed manganese sulfate by using wastewater of crude indium production

The invention discloses a method for co-production of feed manganese sulfate by using wastewater of crude indium production. According to the method, on the basis of production of feed manganese sulfate through a wet method, the influence of excessive sulfuric acid and heavy metals including arsenic, cadmium and the like in the wastewater of the crude indium production through a wet method on the environment is thoroughly eliminated while the feed manganese sulfate is produced, so that the production of crude indium and the feed manganese sulfate through the wet method achieves comprehensive and full utilization of wastes, and the pollution caused by waste acid water containing heavy metals to the environment is thoroughly eliminated. The method comprises the steps of 1, performing leaching reaction on manganese ash in a leaching tank by using indium preparation wastewater; 2, performing pressure filtration; 3, adjusting the pH value of the filtrate to 4-4.5, and then pressing liquid; 4, adding barium sulfide to improve the pH value of a stock solution to 5-5.4, and then filtering; 5, cooling and standing the stock solution, adding an SDD (sodium dimethyl dithiocarbamate) solution and a flocculating agent, then performing pressure filtration, concentrating the filtrate, performing evaporative crystallization, and drying to obtain a feed manganese sulfate product. By adopting the method, the indium preparation wastewater and waste residues causing environmental pollution can be fully and comprehensively used, and a raw material for producing manganese sulfate is provided, so that the method is favorable for reducing the production cost and protecting the ecological environment.
Owner:JIANGXI RUIDA NEW ENERGY TECH CO LTD

Preparation method of microbial agent for preventing and treating wheat root nematodes

InactiveCN111903714AStrong ability to kill nematodesBreed fastBiocidePlant growth regulatorsBiomassBacillus amyloliquefaciens
The invention discloses a preparation method of a microbial agent for preventing and treating wheat root nematodes, and mainly aims to solve the problems of poor effect and environmental pollution ofan existing root nematode prevention and treatment mode. The preparation method comprises the following steps: preparing the following raw materials: bacillus subtilis and bacillus thuringiensis mixedfermentation liquor, bacillus mucilaginosus and paecilomyces lilacinus mixed fermentation liquor, paenibacillus polymyxa, bacillus licheniformis, bacillus amyloliquefaciens fermentation liquor, verticillium chlamydosporium, potassium fulvate, modified biomass charcoal, chitin and colloidal chitin; stirring paenibacillus polymyxa, bacillus licheniformis, bacillus amyloliquefaciens fermentation liquor, the modified biomass charcoal, potassium fulvic acid, chitin and verticillium chlamydosporium to obtain a mixture A; mixing bacillus subtilis and bacillus thuringiensis mixed fermentation liquor,bacillus mucilaginosus and paecilomyces lilacinus mixed fermentation liquor and colloidal chitin to obtain a mixture B; and uniformly mixing the mixture A and the mixture B to obtain the microbial agent for preventing and treating the wheat root nematode.
Owner:LUOHE SHENGLIANG BIOLOGICAL SCI & TECH

Method for producing special-purpose fertilizer for ramie with sewage water sludge composting of brewhouse

The invention provides a method for preparing ramie special fertilizer from stockpile manure of sewage and sludge of a brewery. The method comprises the following steps: the sewage and sludge from the brewery is mixed with rape seed cakes according to the weight ration of between 1.8 and 5 to 1 to obtain the mixture; the C / N mass ratio and the initial water content of the mixture is adjusted to between 28 to 31 and 28 to 1 and between 58 and 62 percent respectively, the mixture after adjustment is put in plastic woven bags and sealed, and the plastic woven bags are piled in multiple layers for micro aerobic stockpile manure fermentation for 18 to 22 days; the stockpile manure after fermentation is dried at a temperature of less than or equal to 70 DEG C to obtain the brewery sewage and sludge stockpile manure with the water content of less than or equal to 10 percent; according to the weight ratio of 10 to 4-6 to 2-3 to 1-2, the brewery sewage and sludge stockpile manure, urea, calcium superphosphate and potassium chloride are mixed and evenly stirred to obtain the ramie special fertilizer. The method has the advantages of making the harmfulness reduction and the effective utilization of the brewery sewage and sludge, repeatedly using common plastic woven bags and having low cost.
Owner:WUHAN TEXTILE UNIV

Lithium titanate battery cell capable of inhibiting flatulence and preparation method thereof

The invention discloses a lithium titanate battery cell capable of inhibiting flatulence and a preparation method thereof. The preparation method comprises the steps that mixing lithium titanate, a conductive agent, a binder and an additive capable of inhibiting flatulence into slurry to prepare a lithium titanate pole piece; carrying out spraying treatment on the lithium titanate pole piece, spraying an insulating layer on the surface of the lithium titanate pole piece, slitting, and carrying out winding/laminating and other processes on the slit lithium titanate pole piece, a positive plateand a diaphragm to prepare a lithium titanate battery cell; and carrying out the procedures of liquid injection, formation, aging and the like on the lithium titanate battery cell to obtain the lithium titanate battery cell. According to the invention, the additive for inhibiting flatulence is introduced into the raw material components of the lithium titanate pole piece, so that the formation ofa compact SEI film is promoted on the surface of the lithium titanate material, and battery flatulence is reduced; and the insulating layer is sprayed on the surface of the lithium titanate pole pieceto isolate the lithium titanate material from an electrolyte, so that direct contact reaction is avoided, and the risk of gas production is reduced. In addition, the formation and aging processes areimproved, the moisture in the environment is strictly controlled, and the lithium titanate battery cell with excellent performance is prepared.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
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