7results about How to "Process green" patented technology

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".

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 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 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.