16results about How to "Process green" patented technology

The invention discloses a Staphylococcus edaphicus H3, the preservation number of the Staphylococcus edaphicus H3 in Guangdong Microbial Culture Collection Center is GDMCC No: 64958, the strain H3 is applied to fermentation of meat products without nitrite, the Staphylococcus edaphicus H3 can promote color development of the meat products, and the Staphylococcus edaphicus H3 has relatively strong oxidation resistance, can effectively inhibit lipid peroxidation, and can be used for preparing the meat products. The staphylococcus aureus H3 can produce polysaccharide, the polysaccharide also plays an anti-oxidation role in a meat product processing process and is beneficial to maintenance of meat color, the strain H3 is inoculated to ferment sausages, the nitrite content in the sausages is obviously reduced, the hardness, cohesiveness, elasticity and chewiness of the sausages are improved, the taste of the sausages is richer, the delicate flavor is increased, and the sausages are more delicious. The strain H3 has no blood coagulation and hemolysis effects, is safe and reliable as a food additive, and is suitable for industrial production and market popularization and application.

The invention provides a synergistic accelerant suitable for SNCR (selective non-catalytic reduction) denitration and application of the synergistic accelerant. The synergistic accelerant comprises the following components in parts by weight: 2-80 parts of an activating agent, the activating agent is selected from at least one of sodium glycinate, sodium glutamate, sodium iminodiacetate, sodium aspartate, sodium aminopropionate, sodium aspartate and potassium aspartate; 3-12 parts of a catalyst, wherein the catalyst is selected from soluble heteropolyacid; 1-10 parts of a catalytic promoter; the catalytic promoter is selected from at least one of soluble tungstate and molybdate. A trace amount of synergistic accelerant is added into a common SNCR denitration solution, so that the reaction speed of NOx and reducing agents such as ammonia or urea can be increased, a temperature window of SNCR reaction moves downwards, the application range of the traditional SNCR technology is expanded, the removal efficiency of NOx is improved, and a low-cost and high-efficiency method is provided for pollution abatement of nitric oxide in waste gas.

The invention discloses a high-thermal-conductivity polypropylene composite material and a preparation method thereof, and belongs to the technical field of high polymer material modification. The high-thermal-conductivity polypropylene composite material comprises the following components in parts by mass: 70-80 parts of polypropylene resin; 20 to 30 parts of graphene oxide; 0.1 to 0.5 part of a double-walled carbon nanotube; 5 parts of maleic anhydride grafted polypropylene; and 1 part of an auxiliary agent. Wherein the adopted graphene oxide has a two-position structure, the double-walled carbon nanotube has a one-dimensional structure, and both the graphene oxide and the double-walled carbon nanotube have very high heat conductivity coefficients; when the two materials are added into polypropylene at the same time, the micro-content of the double-walled carbon nanotube with the one-dimensional structure plays a role in lapping in the melt blending process, and forms a network structure together with the graphene oxide with the two-dimensional structure, so that the heat-conducting property of the polypropylene composite material is greatly improved.

The invention discloses a system for continuous green electrocatalytic synthesis of high-concentration hydrogen peroxide. The hydrogen peroxide synthesized through electrocatalysis can be directly used for the back-end olefin epoxidation reaction after being concentrated, the safety problem caused by easy explosion in the high-concentration hydrogen peroxide transportation process is avoided, the cost problem caused by hydrogen peroxide transportation is solved, and the greenness and economic added value of the whole technological process are increased. In the electrocatalytic synthesis process of hydrogen peroxide, the solid electrolyte is matched with water for use, so that the problem of subsequent separation caused by use of liquid electrolyte in the traditional electrocatalytic synthesis process of hydrogen peroxide is solved. Compared with an anthraquinone method in which hydrogen peroxide is concentrated from an organic solvent, the method has the advantage that the hydrogen peroxide concentration process is simple, convenient, green and economical due to mixing of water generated by electro-catalysis and hydrogen peroxide in the process.

The invention discloses a green in-situ preparation method of a high-strength slow-release antibacterial fibrous membrane, which comprises the following steps: dissolving modified chitosan in water to obtain a modified chitosan aqueous solution, and slowly dropwise adding a silver source solution for reaction under the dark and heating conditions to obtain a modified chitosan solution containing nano-silver particles; mixing the solution with water to obtain a dilute solution; dissolving the modified chitosan and a spinning aid in a mixed solvent of a dilute solution and ethanol to obtain a spinning solution; or dissolving modified chitosan in a dilute solution to obtain a modified chitosan solution, dissolving a spinning aid in ethanol to obtain a spinning aid solution, and uniformly mixing the modified chitosan solution and the spinning aid solution to obtain a spinning solution; preparing the high-strength slow-release antibacterial fiber membrane from the spinning solution through a solution jet spinning technology; the modified chitosan contains a reducing group. The prepared high-strength slow-release antibacterial fiber membrane has the functions of high mechanical strength, long-acting antibacterial property and slow release of silver ions.

The application discloses a kind of MOF / COF synergic modification cellulose biomass composite flame retardant and its preparation method and application, it is related to biomass-based flame retardant technical field.A kind of MOF / COF synergic modification cellulose biomass composite flame retardant preparation method, including the following steps: after pretreatment, cellulose biomass is modified with functional group, and functional group cellulose biomass carrier is obtained;With the functional group cellulose biomass carrier as substrate, by sequential growth method or one-pot method, MOF and COF are simultaneously loaded on it, and the MOF / COF synergic modification cellulose biomass composite flame retardant is obtained.The flame retardant proposed in the application gives full play to the efficient catalytic charring capacity of MOF, the excellent adsorption and stability characteristics of COF and the carbon source and carrier effect of cellulose biomass, and realizes the multiple flame retardant mechanism synergy of "physical barrier-catalytic charring-adsorption smoke suppression".

The present application discloses a preparation method and application of nanocellulose. The preparation method comprises at least the following steps: mixing a cellulose raw material with an organic acid and water, reacting, and high-pressure homogenizing to obtain the nanocellulose. The cellulose raw material is selected from sawdust or agricultural waste; the sawdust is selected from at least one of poplar sawdust, beech sawdust or birch sawdust; the agricultural waste is selected from at least one of corn stalks or sugarcane bagasse. The present application adopts a method combining low-concentration organic acid catalysis with high-pressure homogenization to prepare nanocellulose. The process is simple and green, and the situation of excessive acid concentration corroding equipment in traditional inorganic acid preparation is avoided, providing a new idea for the industrial production of nanocellulose.

The invention provides a method for recovering copper and zinc in a difficult-to-treat gold concentrate acid leaching solution, separates the main impurity elements copper and zinc enriched in the wet gold concentrate treatment acid leaching solution, adopts a "hydrophobic functionalized ionic liquid + di(2-ethylhexyl) phosphate (P204) + organic solvent" composite extractant, and achieves rapid phase transfer of copper and zinc ions through multiple synergistic effects such as complexation of ionic liquid functional groups, intermolecular interaction and solvent extraction, thereby realizing efficient extraction and recovery of copper and zinc ions in a complex strong acid solution system. The method involves a simple process, low energy consumption, less waste liquid generation, and a green process, which not only reduces the actual production cost, but also realizes full utilization of resources, and has certain social benefits and economic value.

This invention relates to a recombinant bacterial cell for de novo synthesis of xanthocyanin WGX-50 using glucose as a carbon source, its construction method, and its applications. The recombinant bacterial cell uses *Escherichia coli* as the host strain and integrates the following three heterologous biosynthetic modules: a 3,4-dimethoxyphenylethylamine de novo synthesis module, which contains an enzyme system catalyzing the generation of dopamine from L-tyrosine and further stepwise methylation of dopamine to 3,4-dimethoxyphenylethylamine; a cinnamoyl-CoA synthesis module, which contains an enzyme system catalyzing the generation of cinnamoyl-CoA from phenylalanine or glucose metabolic intermediates; and an amidation module, which contains an acyltransferase capable of catalyzing the condensation of 3,4-dimethoxyphenylethylamine and cinnamoyl-CoA to generate xanthocyanin WGX-50. This invention achieves, for the first time, the de novo biosynthesis of xanthocyanin in microorganisms, completely eliminating dependence on the expensive exogenous precursor 3,4-dimethoxyphenylethylamine and significantly reducing raw material costs.

A device and method for deep treatment of organic matter in reverse osmosis membrane filtration concentrate from coal chemical industry are disclosed. This invention relates to a device and method for treating membrane filtration concentrate, aiming to solve the technical problems of easy scaling, high energy consumption, and long treatment time in existing membrane filtration concentrate treatment methods. The device of this invention includes a heat exchanger, an advanced oxidation tank, an electrocoagulation coupled electro-oxidation tank, and a sedimentation tank connected in sequence. A persulfate dosing system is connected to the advanced oxidation tank. Simultaneously, the electrocoagulation coupled electro-oxidation tank and the sedimentation tank are connected to the advanced oxidation tank via reflux pipes. Through the combination of advanced oxidation and electrocoagulation coupled electro-oxidation, thermal activation and Fe... 2+ Ion activation generates sulfate free radicals, which react with existing chloride ions to produce active chlorine. This oxidizes and degrades recalcitrant organic matter in the reverse osmosis concentrate, reducing scaling problems in subsequent evaporation and crystallization systems and completely separating organic matter from the crystalline salt. This invention can be used in the field of wastewater treatment.

The application relates to the technical field of compound fertilizer, and particularly discloses a special fertilizer for wormwood and a preparation method thereof. The special fertilizer comprises the following components: 500-600 parts of straw humic organic fertilizer, 60-100 parts of humic acid, 30-50 parts of amino acid raw powder, 40-50 parts of ammonium sulfate, 80-90 parts of monoammonium phosphate, 60-65 parts of potassium sulfate, 10-20 parts of calcium carbonate, 10-15 parts of magnesium sulfate, 1-3 parts of boric acid, 1-5 parts of ferrous sulfate, 1-5 parts of manganese sulfate and 30-35 parts of bio-based polyurethane. The bio-based polyurethane coating agent is prepared by using bio-based PDI and castor oil-based polyol as raw materials, and by adopting a chain extension agent and a grafting monomer for chain extension, and the special fertilizer after coating treatment can effectively solve the shortcomings of easy caking and inconvenient storage, and can realize accurate supply of nutrients through slight slow release. Meanwhile, the bio-based coating can be naturally degraded, has no soil residue, does not damage soil structure, does not affect the quality of wormwood medicine, can improve the utilization rate of fertilizer nutrients, and can reduce nutrient loss.

The invention relates to a method for preparing acetonitrile by catalyzing ammoxidation of ethanol with an ultramicro high-entropy alloy catalyst. The preparation method of the high-entropy alloy catalyst comprises the following steps: dispersing precursors of platinum, palladium, ruthenium, gold and silver in volatile low-carbon primary alcohol, then adding a proper amount of oxide carrier, carrying out ultrasonic dispersion, placing a suspension of the alcohol in an explosion-proof oven, and carrying out slow solvent evaporation self-assembly to obtain a dry powder sample. And after the powder sample is reduced in a tubular furnace, the oxide-loaded PtPdRuAuAg high-entropy alloy catalyst is obtained. The catalyst is mixed with an ethanol water solution and an ammonia water solution, the mixture is placed in a pressure-resistant reaction kettle to be sealed, oxygen is introduced, a reaction is carried out under stirring, and acetonitrile is prepared through an ammoxidation process. The process is high in catalytic activity and excellent in recycling performance, and after ten times of recycling, the catalytic activity can still be kept 90% of the activity of a fresh catalyst. The catalyst is high in structural stability and excellent in ammonia corrosion resistance, and is an ideal novel ethanol ammoxidation catalyst.

The invention discloses a method for green preparation of ammonium persulfate from sodium sulfate solid waste based on a membrane technology, and belongs to the technical field of sodium sulfate solid waste recycling, and the method comprises the following steps: S1, system assembly and electrolyte preparation: assembling a three-chamber electrolytic bath according to the sequence of an anode chamber, a cation exchange membrane, an intermediate chamber, a precise control membrane and a cathode chamber, preparing an anode chamber sulfuric acid electrolyte, an intermediate chamber sodium sulfate raw material solution and a cathode chamber ammonium bicarbonate initial solution; s2, starting the system and establishing a steady state: introducing ammonia gas into the cathode chamber and adjusting the flow of the ammonia gas to dynamically stabilize the pH value of the cathode chamber in a target interval of 9.0-9.5 so as to establish an NH4 < + > storage area in the cathode chamber; s3, continuous operation and dynamic material balance: after the system enters a steady state, extracting an anode chamber mixed solution, and extracting a part of cathode chamber mixed solution in a cathode chamber; supplementing materials in each chamber; s4, crystallizing and purifying ammonium persulfate; according to the invention, the technical problem of direct electro-synthesis of ammonium persulfate from sodium sulfate is solved through the innovation of a precise control membrane design and an ion migration strategy.

The invention discloses a high-weather-resistance thin-wall polyester elastomer composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The high-weather-resistance thin-wall polyester elastomer composite material comprises the following raw materials in parts by mass: 80-95 parts of TPEE resin; 5-20 parts of a plasticizer; 1 part of a lubricant; 1-5 parts of an efficient weather-resistant agent; the high-efficiency weather-resistant agent comprises a COFs material serving as a carrier, an antioxidant, an auxiliary antioxidant, a light absorber and a light stabilizer, wherein the high-efficiency weather-resistant agent comprises a COFs material with an adsorption function, an antioxidant and a light stabilizer, the COFs material has high porosity, high specific surface area and a micro-mesoporous structure, and after the antioxidant and the light stabilizer are introduced, adsorption is performed, the addition amount of the antioxidant and the light stabilizer is increased, precipitation of an auxiliary system is effectively prevented, and the weather resistance of the TPEE resin is effectively improved.

The application discloses a preparation method of biomass Fischer-Tropsch synthesis diesel oil, which comprises the following steps: converting cellulose and lignin in biomass into biomass synthesis injection powder fuel through superheated steam pressure reduction hydrothermal carbonization of wood fiber biomass raw materials; producing biomass synthesis gas through pressurized entrained flow bed high-temperature gasification of the biomass synthesis injection powder fuel, wherein the gasification agent is oxygen and water vapor, and the biomass synthesis gas is adjusted to H / C=2-3:1; and producing biomass Fischer-Tropsch synthesis diesel oil through a Fischer-Tropsch synthesis process of the biomass synthesis gas. The biomass Fischer-Tropsch synthesis diesel oil can be produced in a large scale and continuously by using the biomass synthesis injection powder fuel obtained through superheated steam pressure reduction hydrothermal carbonization of biomass.

The invention relates to the technical field of biomass adhesives, in particular to a functional wood fiber modified soybean protein adhesive and a preparation method thereof, and the soybean protein adhesive provided by the invention is prepared from soybean protein meal, functional wood fibers, ethylene glycol glycidyl ether and a dispersion medium. The preparation method comprises the steps of preparation of the functional wood fiber and preparation of the soybean protein adhesive. In the adhesive disclosed by the invention, the functionalized wood fiber is used as a filler to play a physical filling role and is also used as a chemical crosslinking site, so that the functionalized wood fiber and the soybean protein meal are chemically crosslinked through an epoxy ring-opening reaction of the crosslinking agent, and a more stable and compact crosslinked network is formed. The soybean protein adhesive has the advantages that the water-resistant requirement of the adhesive for the plywood can be met, and the practical performance of the soybean protein adhesive is ensured; the problem of indoor air pollution caused by common'trialdehyde 'plywood is solved; the production cost of the soybean protein adhesive is reduced, and the industrial requirements of artificial boards are met.