110results about How to "Method green" patented technology

The invention discloses a preparation method of a nano silver / poly dopamine composite membrane. The preparation method comprises following steps: phase inversion is adopted so as to prepare a polyether sulfone (PES) ultrafiltration basement membrane; the PES ultrafiltration basement membrane is immersed in a dopamine solution, and an ultrathin active layer is formed via deposition of poly dopamine onto the surface of the PES ultrafiltration basement membrane; in-suit introduction of nano silver onto the membrane surface is realized via silver nitrate postprocessing, and the nano silver / poly dopamine composite membrane is prepared. Advantages of the preparation method are that: compared with the preparation method of conventional nano silver composite membranes, poly dopamine is taken as a multifunctional unit, and construction of a separation layer, mineralization, and immobilization of nano silver are realized. The preparation method is green, simple, convenient, and controllable; the separation layer is obtained via water phase construction, and no organic solvent is needed; in-suit synthesis of nano silver is realized, and no chemical reductant or photo-initiation is needed. The nano silver / poly dopamine composite membrane possesses relatively high water flux, and excellent dye separation performance and antibacterial properties.

The present invention discloses a method using 1,4-dihydroxy-9,10-anthraquinone thiosemicarbazone compound as a fluorescent probe to detect copper ions, and belongs to the technical field of optical analysis detection. The recognition effect of the 1,4-dihydroxy-9,10-anthraquinone thiosemicarbazone compound and various metal ions is investigated and studied experimentally, a good copper ion selective recognition effect of probe molecule ESN is found, due to the solubility of hydroxyl and water, the probe molecule can achieve the fluorescence identification of the copper ions in an aqueous solution, a better result can be achieved under physiological pH condition, the method is green, specific in copper ion selectivity and relatively high in sensitivity, and can play fluorescence quenching role in short reaction time, and the probe molecule can be successfully applied to the detection of the copper ions in biological living cells.

The invention discloses a high-temperature resistant waterborne polyurethane adhesive and a preparation method thereof. The adhesive is prepared through the following steps: adding acetone into a polybasic alcohol and then performing reaction with isocyanic acid to generate a preformed polymer of terminal isocyanate, and simultaneously, introducing a hydrophilic group to the reaction for chain extension; then adding a salt forming agent for salification, adding water for emulsification, and adding a chain extender with particular functions for secondary chain extension; and finally, performing compounding to prepare the high-temperature resistant waterborne polyurethane adhesive. The preparation method of the adhesive is simple, and the prepared adhesive has the advantages of good high-temperature resistance, water resistance, electrical property, stable performance, innocuity and environmental protection, large initial viscous force, high bonding strength, and low activation temperature, can be applied to the adhesions of PET, PE and the like as well as papers, fabrics and non-woven fabrics, and has excellent application prospect.

The invention relates to a preparation method of a nitrogen-doped carbon-supported monoatomic catalyst. The method comprises the following steps of: dissolving transition metal acetate in deionized water, and adding a pyrrole monomer into the deionized water dropwise to obtain a reaction precursor; transferring the reaction precursor into a reaction kettle to carry out a hydrothermal reaction, andcarrying out centrifugal separation on the product and freeze drying the product after the reaction is finished; adding a dried sample into a hydrochloric acid solution to remove oxides, carrying outsuction filtration separation on the product, washing and freeze drying the product; and placing the dried sample into a porcelain boat, carrying out heat treatment in a tubular furnace in a protective atmosphere, and naturally cooling to obtain the nitrogen-doped carbon-supported monoatomic catalyst. Due to the existence of a ligand in the precursor complex, metal ions can be effectively prevented from being agglomerated to generate atomic clusters in the preparation process. Besides, the monoatomic loading capacity can be regulated by regulating parameters such as pyrrole, acid treatment time and the like. The method is green, efficient and easy to operate, no precise and complicated equipment is needed, and the method is suitable for large-scale production.

The invention belongs to the technical field of direct methanol fuel cells and discloses a preparation method of a nano-palladium or palladium-nickel alloy catalyst having a three-dimensional porous structure. The preparation method comprises carrying out cathode electrodeposition in a metal salt solution to obtain the nano-palladium or palladium-nickel alloy catalyst having a three-dimensional porous structure, wherein in the cathode electrodeposition, produced hydrogen bubbles are used as dynamic templates. The nano-palladium or palladium-nickel alloy catalyst obtained by the preparation method is a three-dimensional porous Pd or Pd-Ni alloy, has aperture walls composed of nanoscale dendritic crystals, has a large chemically active specific surface area, and has good catalytic activity and stability in electrocatalytic oxidation of methanol. The preparation method has simple processes, obvious effects and a wide application prospect in the field of anode catalysts of direct methanol fuel cells.

The invention belongs to the field of analysis of harmful ingredients of an electronic cigarette and particularly relates to a method for measuring eight carbonyl compounds in electronic cigarette tobacco tar. The method is characterized in that a DNPH (dinitrophenylhydrazine) solution prepared from diluted hydrochloric acid and the carbonyl compounds in the electronic cigarette tobacco tar have a derivatization reaction, pH (potential of hydrogen) of the reaction solution is adjusted with Tris (trihydroxymethyl aminomethane) base, stability of a reaction product is kept, and the eight carbonyl compounds in the electronic cigarette tobacco tar are analyzed and measured with HPLC (high performance liquid chromatography). The method has the advantages as follows: the sample pretreatment process is simple and rapid; a DNPH derivatization reagent and the Tris base are prepared with deionized water, no organic reagent is used in the pretreatment process, and the method is green and environment-friendly. The method is accurate in measurement, high in sensitivity and good in repeatability and can provide a technical support for product quality control of the electronic cigarette tobacco tar.

The invention provides a method for preparing SrCuSi4O10 and BaCuSi4O10 blue pigments through a hydrothermal technique, and belongs to the technical field of hydrothermal chemistry. The method uses copper oxide powder or copper salt, barium salt or strontium salt, and silicate as raw materials, and NH4OH as a mineralizing agent and comprises the following hydrothermal reaction processes: mixing a reactant with distilled water according to a stoichiometric ratio of an objective product, adjusting the pH value of a solution to be greater than 10 and less than 14, putting in a high-pressure reactor so as to enable the filling degree to reach 40%-90%, sealing and reacting for 5-72 hours at the temperature of 230-300 DEG C; and cooling and filtering so as to obtain products. The invention provides a new reaction route and a green preparation method for SrCuSi4O10 and BaCuSi4O10 difficult to prepare. The products are multi-level structure microparticles, have high purity, regular morphology and good dispersity and are uniform in particle size. The preparation method is simple, efficient and high in yield; waste liquid generated in a hydrothermal reaction process can be recycled.

The invention relates to a device for directly synthesizing C1-C4 alcohol by CH4 / CO2 at low temperature and a synthesis method thereof, belonging to the fields of methane and carbon dioxide resource utilization and plasma catalytic chemical synthesis. The method is characterized by selectively activating the methane and the carbon dioxide to generate the C1-C4 alcohol by adopting a synergistic action of low-temperature plasma and a supported catalyst and the action of additive gas. By the adoption of the device for directly synthesizing the C1-C4 alcohol by the CH4 / CO2 at the low temperature and the synthesis method thereof, a new reaction process of one-step synthesis of the C1-C4 alcohol by methane dry reforming is achieved.

The invention discloses a method for detecting copper ions with the 1,4-dyhydroxy-9,10-anthraquinone salicylic hydrazide compound as a fluorescence probe and belongs to the technical field of optical analysis detection. According to the method, the recognition action of the 1,4-dyhydroxy-9,10-anthraquinone salicylic hydrazide and 15 types of metal ions is observed and researched through experiments, it is found out that the probe molecule EXZ has a good selective recognition action on the copper ions, the probe molecule can achieve fluorescent recognition of the copper ions in a water solution through the solubleness of hydroxide radical and water, and a good result can be achieved under the physiological pH value condition. The method is environmentally friendly, the selectivity of the copper ions is concentrated, sensitivity is high, a fluorescence quenching function is achieved within a short reaction time, and the probe molecule can be successfully applied to detection of the copper ions in creature living cells.

The invention relates to a preparation method of biobased water-borne UV (ultraviolet) curing environment-friendly nail polish. The preparation method is characterized by comprising the following steps of weighing 30 to 50% of biobased water-borne UV curing environment-friendly nail polish resin, 5 to 10% of deionized water, 40 to 60% of pigment, 0.1 to 0.5% of wetting dispersant, 0.1 to 0.5% of flatting agent, 0.2 to 0.5% of defoaming agent, and 1.0 to 2.0% of thickener; adding the pigment, the wetting dispersant, the flatting agent, the defoaming agent and the deionized water into a ball mill to mill, so as to obtain a color paste a; adding the biobased water-borne UV curing environment-friendly nail polish resin into the color paste a, stirring at high speed, adding the thickener, and filtering by a 200-mesh filter net, so as to obtain the biobased water-borne UV curing environment-friendly nail polish. The prepared biobased water-borne UV curing environment-friendly nail polish has the characteristics that the curing speed is quick, the transparency is good, the storage stability and luster are high, the adhesion force is good, and the like. The preparation method has the advantages that the green, environment-friendly, non-toxic and non-odor effects are realized, and the product cost is reduced.

The present invention is a preparation and characterization method of a graphene / gold nanoparticle composite material. The specific steps are: (1) preparation of graphene oxide: including multiple steps of low-temperature reaction, medium-temperature reaction, high-temperature reaction and post-treatment; (2) ) preparation of graphene oxide dispersion system; (3) preparation of graphene / gold nanoparticle composite electrodeposition precursor; (4) preparation of graphene / gold nanoparticle composite material: including electrode pretreatment and electrodeposition preparation; ( 5) Characterization of graphene / gold nanoparticle composites: including scanning electron microscopy and transmission electron microscopy. The method for preparing the graphene / gold nanoparticle composite material in the invention is simple and green, and by adjusting the form and concentration of the metal precursor, the morphology control of the graphene-based composite film can be realized. The controllability of the structure of this method provides a new idea for material design and controlled synthesis for the application of graphene-based materials, especially in electrochemistry.

The invention relates to a nickel-based supported catalyst and a method for preparing methanol through plasma catalysis CO2 hydrogenation by using the nickel-based supported catalyst, and belongs to the fields of CO2 emission reduction, CO2 resource utilization and plasma catalysis chemical synthesis. The synergistic effect of low-temperature plasmas and the nickel-based supported catalyst is usedfor activating CO2 and hydrogen gas to selectively generate the methanol. The invention provides the catalyst; under a plasma condition, a NiOx-based (x is greater than 0 but is smaller than 1) catalyst has relatively high methanol selectivity; particularly, NiOx is loaded on a TiO2 carrier; the methanol selectivity approaches to 80 percent; a copper-based catalyst is an optimal common catalyst for catalysis of methanol preparation through CO2 hydrogenation.

The invention discloses a composite fermented microbial soil conditioner and a preparation method thereof. The composite fermented microbial soil conditioner comprises 10-20 ml of actinomycetes fermentation liquor, 10-30 ml of saccharomycetes fermentation liquor, 10-40 ml of lactobacillus fermentation liquor, 10-50 ml of bacillus fermentation liquor, 10-20 ml of photosynthetic bacteria fermentation liquor, 5-15 g of actinomycetes powder, 3-8 g of saccharomycetes powder, 5-15 g of lactobacillus powder, 10-30 g of bacillus powder, 3-8 g of photosynthetic bacteria powder and 50-100 kg of an organic material of which C: N= 20-25: 1. The invention provides the composite microbial agent which promotes fertility absorption in soil, improves physical and chemical properties of soil, improves soilcaking caused by a large amount of fertilization for a long time, increases the content of beneficial bacteria of the soil, increases the content of organic matters of the soil, promotes growth of root systems of plants, inhibits soil-borne diseases and improves disease resistance of crops and a preparation method of the composite microbial agent. The method is environmentally friendly, pollution-free, low-carbon, efficient, short in period, low in cost and simple to operate.

The invention relates to the technical field of energy and materials, in particular to a method and device for recycling metal from a waste lithium battery. The method comprises the following steps that the electrode material of the waste lithium battery is used as a cathode, and a noble electrode is used as an anode; and the cathode and the anode are placed in an electrolyte to carry out an electrochemical reaction, a mixed solution containing recycling metal ions is obtained, and the recycling metal ions comprise at least one kind of nickel ions, cobalt ions and manganese ions. The electrochemical reaction is utilized, and lithium, nickel, cobalt, manganese and other metal with high utilization value can be effectively recycled from a waste lithium battery electrode material.

The invention provides a preparation method of a negative electrode active material for a lithium-ion battery. The method comprises the following steps: dissolving nonionic polysaccharide into a water solution, adding a certain amount of graphene-like transition metal disulphide, carrying out ultrasonic dispersing and stripping for a period of time and then centrifuging the solution to obtain a disperse solution of the non-ionic polysaccharide / graphene-like transition metal disulphide; carrying out freeze drying, roasting the product in a nitrogen atmosphere for a certain period of time, taking out the product, alloying and grinding the product and potassium hydroxide, and then burning and activating the mixture in the nitrogen atmosphere to obtain the graphene-like transition metal disulphide / porous carbon material. The graphene-like transition metal disulphide / porous carbon material is applied as the negative electrode material for the lithium-ion battery. The graphene-like transition metal disulphide is stripped through the non-ionic polysaccharide, so that the method is green, simple and effective; and meanwhile, the obtained graphene-like transition metal disulphide / porous carbon material is suitable for the negative electrode material for the lithium-ion battery, excellent in performance and beneficial to industrial production and application.

The invention discloses a preparation method for fish eye socket active grease. The preparation method for the fish eye socket active grease includes the steps: removing skins and bones of fresh fish heads to get eye socket meat and homogenizing; carrying out ultrasonication; adding neutral protease to carry our enzymolysis; adding alkaline protease to carry out the enzymolysis after deactivating enzyme; achieving enzymatic hydrolysate after deactivating enzyme; achieving free oil, an emulsus layer, a water layer and a precipitate layer after centrifuging; merging the emulsus layer and the water layer, and extracting grease through a supercritical carbon dioxide extraction method; and merging the achieved grease to get the fish eye socket active grease. According to the preparation method for the fish eye socket active grease, waste fish heads of traditional fishery are adopted as raw materials for preparing active grease products, so that the preparation method for the fish eye socket active grease has significance in fish comprehensive processing and utilization and environment protection, and economical benefit is improved. Ultrasonic is adopted to assist the complex enzyme for the enzymolysis of fish sockets, no organic solvent is used in the process of extraction, and the preparing method is environmental-friendly and high in a recycle rate of the grease. The preparation method for the fish eye socket active grease is simple and convenient to operate, moderate in conditions of the extraction method, and capable of preserving certain original physiological activators in the eye socket grease to a maximum degree and enabling the products to have trophism and functionality.

Rebaudioside-KA is a nature-derived novel tetranuclear diterpenoids sweetener compound with low calorific value and high sweetness, has very low content in Stevia rebaudiana, and is difficult to obtain in in a large quantity and in a low cost and green manner. The invention establishes a green biosynthetic method for rebaudioside-KA from rubusoside, which can be easily obtained in a large quantity, as a substrate by fixed-site glycosylation by using glycosyltransferase OleD and a homologous protein thereof. The invention realizes green biological preparation of high-purity rebaudioside-KA through optimizing reaction conditions. The sweetness of rebaudioside-KA is equivalent to the sweetness of rubusoside (over 300 times o sucrose sweetness), and the rebaudioside-KA has pure taste and no bitter after-taste, so that the rebaudioside-KA is more suitable for being used as a sweetener or a correctant in food, beverage, medicament, alcohols, nutritional health products, condiment, chemical necessities, oral hygiene products, cosmetics and other products and fields.

The invention discloses a two-dimensional composite photocatalyst namely h-BN / Ti3C2 / TiO2, and a preparation method and an application thereof. The catalyst has a two-dimensional composite structure, wherein wafer-shaped h-BN is loaded on a Ti3C2 nanosheet; meanwhile, a TiO2 particle obtained by oxidation of Ti3C2 is located between the wafer-shaped h-BN and the Ti3C2 nanosheet. The preparation method for the catalyst provided by the invention is simple and highly-efficient and has easily-controllable reaction conditions. The catalyst provided by the invention has the advantages of high catalytic activity, good thermal stability, recyclability and the like, realizes simple and highly-efficient catalytic synthesis of xylosic acid, and has good application prospect.

The invention discloses a preparation method of a carbon-silicon solid acid catalyst and application in extraction of organic acid in fermentation broth. The method comprises the following steps: swelling: heating and co-hydrolyzing soluble starch with high content of straight chain molecules and silicate ester for 2 h, aging at room temperature for 1-2 days, exchanging moisture in the system with an organic solvent with lower surface tension than water, and drying; carbonization activation: carrying out one-step carbonization activation by using soluble inorganic salt or strong base under nitrogen protection; and sulfonation: carrying out sulfonation on a carbon-silicon composite material by the use of concentrated sulfuric acid, so as to obtain the carbon-silicon solid acid catalyst. The catalyst is used for extraction of low-concentration organic acid in various fermentation broths. The invention has the following advantages: the synthetic method is green, raw materials are easily available, and discharge of spend liquor and exhaust gas is less; dispersity in an aqueous solution is high; hydrophilicity is strong, and acid value is high; the synthesized material has large specific surface area; synthesis cost is low; catalytic effect is good; and the catalyst can be repeatedly used for many times.

The invention discloses a high-quality pheasant management method adopted in an egg producing period. The high-quality pheasant management method comprises the following steps of 1 management before egg production, 2 management during egg production and 3 management after egg production. By the adoption of the high-quality pheasant management method, scientific and reasonable management is conducted on scientific and reasonable conditions, feeding modes and the like at the three stages before egg production, during egg production and after egg production according to the growth laws of pheasants, the annual egg production yield of the pheasants is improved about 25%, the time transition to a next egg producing period of pheasants is shorted for about one month, the high-quality pheasant management method is green and safe, and the quality and appearance of produced eggs are high.

The invention discloses a preparation method and application of an ionic liquid / MOF composite catalyst. The catalyst is prepared by taking diamino-functionalized ionic liquid and dialdehyde as raw materials and taking a metal organic framework material as a carrier. The preparation method for such a material is simple in process and low in ionic liquid consumption; and the prepared catalyst has excellent catalytic performance, can efficiently catalyze and convert CO2 to prepare cyclic carbonate under mild conditions of normal pressure, low temperature, no cocatalyst and the like, presents excellent cycling stability, and is of great significance to CO2 emission reduction and resource utilization.

The invention discloses a method for reducing electrostatic level in a fluidized bed reactor. The method comprises the following steps: receiving an electrostatic signal inside the fluidized bed reactor, analyzing the received electrostatic signal, selecting characteristic parameters of the electrostatic signal and determining the electrostatic potential level in a fluidized bed, adjusting the superficial gas velocity of different areas, and achieving the reduction of the electrostatic level in the fluidized bed reactor. The method can effectively reduce the electrostatic level in the fluidized bed reactor, so as to ensure continuously stable production operation, has the characteristics of environmental protection, safety, simpleness and easiness and fastness and the like, can reduce thestatic electricity in the fluidized bed reactor to a great extent and control the production parameters according to detection results.

The invention discloses a synthesis method of N-methyl o-fluoroaniline, which comprises the following steps: an amidation reaction: by using o-fluoroaniline as a raw material, mixing o-fluoroaniline with toluene and formic acid, heating to react, and dehydrating while reacting to obtain N-(2-fluorophenyl) formamide; a methylation reaction: taking N-(2-fluorophenyl) formamide as a raw material, adding dimethyl carbonate and a catalyst, putting into an autoclave, and heating to carry out the methylation reaction so as to obtain N-methyl-N-formyl-2-fluoroaniline; and a hydrolysis reaction: takingN-methyl-N-formyl-2-fluoroaniline as a raw material, mixing the N-methyl-N-formyl-2-fluoroaniline with water and sulfuric acid, carrying out hydrolysis, and carrying out post-treatment to obtain theN-methyl o-fluoroaniline. The method has the advantages of easily available raw materials, low raw material cost, mild reaction conditions, greenness, safety, high total yield (up to 90%), and great industrial application prospect.

The invention provides a preparation method of an anode material for lithium ion batteries. The preparation method comprises the following steps: dissolving metal salt of zinc ions and cobalt ions, then adding a certain amount of a polar solvent containing 8-hydroxyquinoline, after mixing and stirring, standing at room temperature, centrifuging and drying the mixture to obtain a metal organic compound of zinc-cobalt-8-hydroxyquinoline, then putting the obtained metal organic compound into a tubular furnace, calcining in an air atmosphere, taking out the metal organic compound to obtain a layered ZnCo2O4 material, and using the layered ZnCo2O4 material into the anode material for lithium ion batteries. The metal organic compound of zinc-cobalt-8-hydroxyquinoline is synthesized in the solution, and then the layered ZnCo2O4 material is obtained through calcinations, so that the method is simple and convenient in synthesis and is effective, the obtained layered ZnCo2O4 material can serve as the anode material for lithium ion batteries, the anode material is excellent in electrochemical performance and can be applicable for industrial production and practical application.

The invention provides a blackleg control method for flue-cured tobacco. The method comprises the steps of carrying out soil disinfection, carrying out seedling-restitution stage treatment and carrying out vigorously-growing stage management. The seedling-restitution stage treatment means after tobacco seedlings are subjected to transplanting and fix planting, scattering a circle of medicinal powder around each tobacco plant, and covering the medicinal powder with soil, wherein the distance between the medicinal powder and the root of each tobacco plant is 10-15cm, and the dosage of the medicinal powder for each tobacco seedling is 5-7g. The adopted medicinal powder contains the following ingredients in parts by weight: 1-1.5 parts of water, 9-11 parts of sweet potato flour, 2-5 parts of tapioca flour, 2-5 parts of pomegranate peel powder, 3.5-4 parts of xanthium sibiricum powder, 3-7 parts of amber powder, 2.2-2.8 parts of garlic oil, 0.8-1.2 parts of perilla frutescens oil and 1-1.5 parts of gardenia flower extract. The soil disinfection means sprinkling disinfectant powder at the application rate of 65-80kg per mu. By adopting the method provided by invention, the control effect on flue-cured tobacco blackleg is obvious.

The invention discloses a method for planting rice through waterlogged direct seeding, and belongs to the field of rice planting. The method comprises the steps of land preparation before seeding, seed selection, prevention and control of weeds, calculation of the seeding amount, germination accelerating, seeding, water management, fertilizer management and prevention and control of diseases and insect pests. The method mainly comprises the following steps that treatment before seeding comprises field surface finishing and ditching for compartment finishing; a rice material with a germinationrate of 80% or above is selected, and germination is accelerated until rice husks are broken and radical buds are grown for standby application; after seeding, the compartment surface is kept waterlogged, wherein the waterlogging depth is 3-5 centimeters; after a three-leaf one-core stage, a water layer of the compartment surface is drained, and it is maintained that water exists in a ditch; in atillering stage, an earing stage and a grain-filling stage, shallow-water irrigation is maintained on the compartment surface. The method can effectively increase the emergence rate and planting percent of directly seeded rice, provides a guarantee for 'one-seeding whole-seedling' of the directly seeded rice, is beneficial to the high and stable yield of the directly seeded rice, can solve the problems such as seedling burnt caused by bird damage, rat damage, crop smothering and local high-temperature waterlogging, and provides a theoretical basis and technical reference for the large-scale popularization and application of the directly seeded rice.

The invention belongs to the field of low-dimensional nanomaterials and particularly relates to a preparation method of a vertical cross SiO2 nanorod. The preparation method comprises the following steps: putting SiO powder in a high-temperature area of a furnace center by using a thermal evaporation method without a metal catalyst; collecting a substrate, and also putting the substrate in the high-temperature area; filling a furnace chamber with argon, raising the temperature of a central area of a tube furnace to 1050 to 1150DEG C, and insulating for 3 to 4hrs; after the insulation time is reached, growing the vertical cross SiO2 nanorod on the growth substrate. The preparation method disclosed by the invention has the advantages of environment friendliness, safety, simple method, quick response, no pollution, low cost, high purity of a sample and the like. The prepared vertical cross SiO2 nanorod has great application potential in the fields of medicine, filtering, catalysis, light absorption, novel materials and the like.

The invention discloses a preparation method of zein-gallic acid composite colloidal particles and emulsion thereof. The method comprises the following steps of preparing a 2% zein ethanol solution, and performing storage in a refrigerator overnight; adding gallic acid according to a proportional relation under a rotary stirring condition, and performing continuous stirring until the gallic acid is completely dissolved; pouring a mixture solution into distilled water, and performing stirring and rotary evaporation to remove ethanol; treating the mixed solution free of the ethanol is removed to obtain the composite colloidal particles; and mixing the mixed solution free of the ethanol with corn oil with the same volume as the mixed solution free of the ethanol, and performing homogenizing at a high speed to obtain the stable oil-in-water emulsion of the zein-gallic acid composite colloidal particles.

The invention relates to a method for preparing acetic acid by one-step conversion of CH4 and CO2 through cooperation of low-temperature plasma and a modified molecular sieve catalyst, and belongs tothe field of CH4 and CO2 conversion and utilization. The preparation method comprises the following steps: (1) modifying a molecular sieve by at least one of a water vapor passivation method, an acidtreatment method, an alkali treatment method, an alkali metal modification method, an alkaline earth metal modification method and a rare earth metal modification method; and (2) roasting the productobtained in the step (1) in a plasma atmosphere at 350-500 DEG C for 0.5-3 hours. According to the method, CH4 and CO2 are converted into acetic acid with high additional value by using a one-step method under the conditions of low temperature and normal pressure, the process is simple, the method is green, the atom economy is high, the problem that the conventional catalytic CH4 and CO2 reactionneeds high temperature (generally higher than 700 DEG C) is solved, and meanwhile, the additional value of the product converted from CH4 and CO2 is increased.

The invention relates to a biological fermentation process of neohesperidin dihydrochalcone. The biological fermentation process comprises the following steps: by adopting neohesperidin as a startingraw material, carrying out biological-process hydrogenation reduction by utilizing a reduced coenzyme NADH to obtain the neohesperidin dihydrochalcone. The biological fermentation process of the neohesperidin dihydrochalcone has the beneficial effects that the process is simple, the operation is convenient, the production efficiency is high, and the product quality is good; the biological fermentation process is green, safe, healthy and reliable.