142results about How to "Compliant with Green Chemistry" patented technology

The invention relates to a three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3>/C micrometer flower electrode material and a preparation method and application thereof. The diameter of the three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3>/C micrometer flower electrode material is 5-10 micrometers, the thickness of a carbon-clad NaTi<2>(PO<4>)<3>/C nanosheet subunit is only 1-5 nanometers, mesopores with pore diameters of 2-30 nanometers are formed in the carbon-clad NaTi<2>(PO<4>)<3>/C nanosheet subunit, the thickness of a surface carbon layer is 2-5 nanometers, and the nanosheet subunits are in over joint to form a three-dimensional conductive network. The three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3>/C micrometer flower electrode material has the advantages that the three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3>/C micrometer flower is prepared by a simple and practical solovothermal method combined with a high-temperature calcination method, and is endowed with excellent high rate performance and stable long-circulation capability when taken as a positive electrode active material of a sodium ion battery. The process is simple, the three-dimensional graded carbon-clad NaTi<2>(PO<4>)<3>/C micrometer flower electrode material is high in practicable and is high in safety coefficient, the requirement on a device is low due to the adoption of the solovothermal method and the calcination processing, production can be expanded, and market promotion is promoted.

The invention discloses a method for enzymatically synthesizing medium-long chain structure triglyceride. Long-chain triglyceride and medium-chain triglyceride are mixed according to a certain mass ratio, lipase is added in a solvent-free system, stirring and reacting are carried out for a period of time at certain temperature, a transesterification reaction is carried out, and a product containing medium-long chain structure triglyceride is obtained. The method for enzymatically synthesizing medium-long chain structure triglyceride is high in reaction speed, high in conversion rate and mild in reaction condition, is efficient and fast, meets green chemistry and is huge in application potential, and large-scale industrial popularization is convenient.

The invention discloses a preparation method for edaravone. The preparation method comprises a step of subjecting hydrazinobenzene and ethyl acetoacetate to a cyclization reaction under a solvent-free condition and action of an acid so as to prepare edaravone, wherein the usage amount of the acid is 0.02 to 10 equivalent of the molar weight of hydrazinobenzene. The preparation method provided by the invention has the advantages of mild conditions, fast reaction, safety, reliability, easy and convenient operation, low cost, almost quantitative completion of the reaction, capacity of obtaining a high purity (greater than 98%) crude product which accords with medicinal standards after simple recrystallization, and suitability for industrial production.

The invention relates to a method for synthetizing liposoluble tea polyphenols by an enzymic method, belonging to the biosynthesis field of food additives. Modified liposoluble tea polyphenols are synthetized by conducting catalytic reaction between the tea polyphenols and fatty acid vinyl ester in an organic solvent system through lipase. Compared with a traditional chemical synthesis, the enzymic method disclosed by the invention has the advantages of mild reaction condition, fewer side effects, fewer reaction steps, simplicity, controllability, environment-friendliness, relative simplicity in production separation, and the like. Therefore, a modifying method for the tea polyphenols, which is effective, rapid and capable of satisfying the trends of green chemistry and environment-friendliness, is provided.

The invention discloses a carbon-decorated porous lithium vanadium phosphate nanosphere material as well as a preparation method and application thereof. Lithium vanadium phosphate particles coated with a carbon layer are connected with one another to form the carbon-decorated porous lithium vanadium phosphate nanosphere material which is characterized in that lithium vanadium phosphate particles are connected with one another by a three-dimensional carbon net, and the three-dimensional carbon net covers lithium vanadium phosphate. The preparation method comprises the following steps: adding a vanadium source, namely vanadium pentoxide, and oxalic acid into distilled water, and agitating until vanadium pentoxide and oxalic acid are dissolved; sequentially adding a phosphorus source, a lithium source, glycol and ethylenediamine; carrying out hydrothermal reaction on the materials to obtain a precursor solution; drying the precursor solution to obtain a red brown solid; and grinding, pre-sintering, grinding and calcining the solid to finally obtain the black three-dimensional carbon-decorated porous lithium vanadium phosphate nanosphere material. When being used as a positive active material of a lithium ion battery, the carbon-decorated porous lithium vanadium phosphate nanosphere material has the characteristics of high power and high cycling stability; the preparation process is simple, and the nanosphere material can be obtained by combining a hydrothermal method with a solid-state sintering method; the nanosphere material is high in feasibility and easy to amplify, meets the requirements of green chemistry, and is suitable for market popularization.

The invention discloses a method for synthesizing Sn-2-monoglyceride through an enzymic method. The method comprises the steps that glyceride and ethyl alcohol are mixed according to the mass ratio of 1:(1-10), in a solvent-free system, lipase is added, reacting under stirring is performed for a period of time at a certain temperature, an ethanolysis reaction is performed, and a product containing the Sn-2-monoglyceride is obtained. According to the method, an acyl transfer side reaction is inhibited through the specificity and high efficiency of enzymes by controlling the reaction conditions, and the reaction conversion rate is very high; meanwhile, the synthesizing time is shortened, the whole process is easy to control, the reaction conditions are mild, the cost can be greatly lowered through recycling of the enzymes, large-scale industrialization promotion is facilitated, and the application potential of the method is great.

The invention relates to a VO2(B)/carbon cloth self-supporting material as well as a preparation method and application thereof. The VO2(B)/carbon cloth self-supporting material is directly obtained through adopting a one-time hydrothermal method, the prepared VO2(B) is of a nanosheet structure, the width of nanosheets is 100-300 nm, the sizes of the nanosheets are uniform, and loads on carbon cloth are very uniform. The preparation method comprises the following steps of: firstly, adding vanadic oxide and oxalic acid into distilled water, and reacting them under a water bath heating conditionto obtain a blue clear solution; adding a H2O2 solution with the mass fraction of 30% into the blue clear solution, and uniformly stirring the mixture; adding absolute ethyl alcohol into the mixture,and uniformly stirring the mixture; transferring the obtained precursor solution into a reaction kettle, and putting carbon cloth for hydrothermal reaction; and cleaning the obtained active materialwith pure water for multiple times, and drying in a vacuum drying oven to finally obtain the VO2(B)/carbon cloth self-supporting zinc ion battery positive electrode material. The preparation method has the advantages of simple process, mild reaction conditions and excellent electrochemical performance of the material.

The invention discloses a preparation method of an efficient ground calcium carbonate grinding dispersant by photo-initiating room-temperature RAFT (Reversible Additive Fragment Transfer) polymerization. The method comprises the following steps: adding a vinyl carboxylic ester monomer, a polythio ester chain transfer agent and a photoinitiator into a solvent and bubbling for 15-30 minutes by nitrogen; illuminating to react for 3-12 hours by an ultraviolet lamp, wherein the central wavelength of the ultraviolet lamp is 365nm and incident light passes through a wave cutoff sheet with the wave cutoff range greater than 254nm; after reaction, mixing the obtained solution with an NaOH solution, hydrolyzing for 3-10 hours at 80-120 DEG C, carrying out reduced pressure distilling to remove the solvent and alcohol byproducts, then, adding the NaOH solution to adjust the pH to 4-8 and adding water to adjust the solid content to 41-43% to obtain the efficient ground calcium carbonate grinding dispersant. Compared with conventional free radical polymerization, the method has the advantages of controllable molecular weight, narrow distribution of molecular weight and no free countra-ions introduced in the initiating process. The method has the following characteristics of simple treatment, pure product and low energy consumption and meets modern green chemistry.

The invention provides an extracting and detecting method for flavonoid in radix sophorae subprostratae. The flavonoid to be detected is lupinifolin and radix sophorae subprostratae chroman flavanone C which are respectively called flavone 1 and flavone 4 for short. The extracting and detecting method disclosed by the invention creatively combines a matrix solid-phase dispersion extraction technology with a reverse micro-emulsion electrokinetic chromatography technology, utilizes combination of an offline enrichment technology and an online enrichment technology to achieve secondary enrichment of the flavonoid in the radix sophorae subprostratae and is beneficial to quantitative detection of the flavonoid in the radix sophorae subprostratae. Furthermore, the extracting and detecting method disclosed by the invention is implemented in a microscale system, the used medical materials and experiment drug reagents are all in a microgram level, the use amount of harmful chemical reagents is small, and safety, economical performance and environmental friendliness are achieved.

The invention relates to a method in which lipase can be used for catalyzing and oxidize linseed oil to prepare epoxidized linseed oil. The method is that refined linseed oil, solvent, organic acid and catalyst can be added into a reaction container which is positioned in a constant-temperature water bath; and then hydrogen peroxide can be dropped into to conduct the reaction. Lipase catalyst can be recycled by filtering, and filtrate can be moved into a separating funnel to separate out organic phases. And then the organic phases can be decompressed and distilled after being diluted to be neutral to obtain the outcome epoxidized linseed oil. The operational art of the method is simple, and the reaction condition is moderate. In addition, organic acid, solvent and catalyst which are added all can be recycled and reused; and another material hydrogen peroxide can be converted into water without pollution after the reaction, thereby avoiding producing a large amount of industrial pollution and saving material; moreover, the cost of the outcome is low, which meets the current requirements of green chemical and atomic economy.

The invention discloses a UV polymerization type body foamed damping material. The UV polymerization type body foamed damping material comprises components in parts by weight as follows: 20-30 parts of an acrylate copolymer, 70-75 parts of a reactive diluent, 0.5-0.8 parts of a photoinitiator and 1-5 parts of hollow inorganic nanoparticles. The high-performance damping material is prepared through UV polymerization, and a solvent-free and pollution-free product is realized thoroughly. The hollow inorganic nanoparticles are taken as an inorganic body foaming agent, the product density can be controlled precisely according to requirements through control of adding amount of the hollow inorganic nanoparticles, and the loss factor of the product can be controlled and increased. The damping material has the advantages of excellent initial adhesion, persistent adhesion, peel strength, interfacial wettability and high loss factor.

The invention discloses a preparation method of 3, 5-dimethyl-4-bromomethylbenzonitrile. The preparation method comprises the following steps: selectively synthesizing an important intermediate, namely aryl aldehyde by utilizing a Grignard reagent and different exchange capacities of bromine and iodine in 2, 6-dimethyl-4-bromoiodobenzene, reducing to get benzyl alcohol, then utilizing halogen-lithium exchange reaction to get an aryl aldehyde compound, further reacting with hydroxylamine to get oxime, dehydrating to get cyan and further synthesizing the 3, 5-dimethyl-4-bromomethylbenzonitrile. According to the preparation method disclosed by the invention, a highly toxic metal cyanide can be avoided, the risk is reduced, and the preparation method is more environment-friendly and in line with the aim of green chemistry; and simultaneously, the route is simple and convenient to operate, the complex post-treatment process is avoided, the production cost is reduced, and the preparation method further has great industrial application prospects.

The invention provides a preparation method of silver nano-dendrites. The preparation method comprises the following steps that (1) a copper bar is washed, specifically, the copper bar is washed with acetone, ethanol, diluted hydrochloric acid and distilled water under ultrasonic conditions correspondingly; and (2) the silver nano-dendrites are prepared, specifically, at room temperature, univalence silver salt is dissolved into distilled water and completely dissolved through stirring, and a solution with the concentration of 0.01-0.1 mol/L is prepared; the cleaned copper bar is placed into a 5 mL test tube, the univalence silver salt solution is dropped into the test tube with a gum cap dropper to conduct a reaction for 5-120 seconds at norm temperature; after completion of the reaction, the copper bar on which black substances grow is washed with the distilled water and is dried naturally in the air, and then nanocrystals are obtained. The preparation method has the advantages of being high in reproducibility, easy and convenient to operate, low in synthesis cost and suitable for industrialized application. The prepared silver nano-dendrites are large in specific surface area and can make full contact with a substance to be tested to make an electro-catalytic reaction sufficient and efficient.

The invention discloses a method for synthesizing luteolin, comprising the following steps of: adding rutin at the room temperature of 20-30DEG C in alkali water and stirring for dissolving; adding a reducing agent of sodium hydrosulfite with equivalent weight of 6.3 once, continuously heating up to 100DEG C and stirring for 12 hours; after the HPLC (High Performance Liquid Chromatography) monitoring reaction is finished, cooling, adding dilute hydrochloric acid or dilute sulfuric acid, adjusting the pH to be 3-4, standing for 24 hours for separating out a solid and filtering; washing a filtering cake with water twice to remove salts contained in the product; and drying to obtain a crude product, continuously crystalizing with ethanol to obtain a pure product with the purity being more than 95 percent. Compared with the prior art, the invention has the advantages of high synthetic efficiency, high yield, low energy consumption, low pollution, greenness, environmental protection and the like and is easy for industrialized production.

The invention discloses a method for deacidifying rice bran oil by using an enzymic method. The method comprises the following steps: mixing rice bran oil with glycerinum, adding lipase which accounts for 2-7% of the total mass of a substrate, enabling the component to react for 5-7 hours in a vacuum device, feeding a product into a nitrogen cooling device, cooling to 25-30 DEG C, and centrifuging so as to remove lipase, thereby obtaining the deacidifed rice bran oil. The method for deacidifying rice bran oil by using the enzymic method, which is disclosed by the invention, is low in rice bran oil acid value, high in nutrient element retention rate, efficient and rapid in reaction, and is a rice bran oil deacidification method which is green and applicable to industrial production.

The invention provides a synthesis method for preparing saccharin, which comprises the following steps: carrying out an oxidation reaction on a 1,2-benzisothiazolin-3-one compound and an oxidant, andoxidizing thioether of the 1,2-benzisothiazolin-3-one compound into sulfamide by the oxidant, thereby obtaining the o-benzoyl sulfamide compound. Compared with a traditional saccharin production process, the saccharin synthesis method has the advantages of being simple in process, low in cost, efficient in separation, small in pollution and the like, and more conforms to green chemistry.

The invention provides a method for preparing 1,6-hexanediol by catalytic hydrogenolysis of 1,2,6-hexanetriol. According to the method, 1,2,6-hexanetriol is taken as a raw material and undergoes a one-step catalytic hydrogenolysis process in the presence of a catalyst and solid acid to realize high conversion rate and high yield of 1,2,6-hexanetriol to prepare 1,6-hexanediol. The technical route provided by the method has the characteristics of short reaction time, high conversion rate of raw materials and high yield of 1,6-hexanediol, and the raw materials can be obtained from renewable biomass resources, so that the method has the advantage of not relying on fossil resources.

The invention discloses a method for preparing manganese-zinc ferrites through carrying out acid dipping on low-grade manganese ores and carrying out ferromanganese remaining and impurity removal, relating to a preparation method for magnetic materials. The method disclosed by the invention is implemented by taking low-grade manganese ores as raw materials through the steps of carrying out acid leaching on the raw materials; simultaneously adjusting the pH value of the obtained product and adding iron powder and an impurity removal reagent into the obtained product; after the impurity removal is completed, adding ferric sulfate and zinc sulfate into the obtained product so as to obtain a solution containing manganese, zinc and iron; sequentially carrying out precipitation and aging on the obtained solution so as to obtain a precursor of a manganese-zinc ferrite; and carrying out sintering on the precursor so as to obtain a finished manganese-zinc ferrite product. According to the invention, through fully using manganese and iron in low-grade manganese ores, the comprehensive utilization of resources is realized, so that the method is low in price of raw materials, simple in process steps and low in production cost, and basically achieves an effect of zero emission in the technological process, therefore, the method completely conforms to the requirements of energy conservation and emission reduction; and a soft magnetic material manganese-zinc ferrite prepared by using the method disclosed by the invention has excellent magnetic properties. The method disclosed by the invention can be widely used for preparing various magnetic materials, and magnetic materials prepared by using the method disclosed by the invention can be widely used as wave-absorbing materials in the electronic industry and military fields.

The present invention provides a preparation method of an aromatic amide compound. In an organic solvent, under the effect of a catalyst, an aromatic acid compound and an amine source are subjected toa dehydration reaction to obtain the aromatic amide compound, wherein the aromatic acid compound is an aromatic acid, a substituted aromatic acid, a heterocyclic aromatic acid or a substituted heterocyclic aromatic acid; and the substituent group of amide is any substituent group of H, a C1-C8 straight-chain alkyl or branched-chain alkyl group, a benzene ring or an aromatic ring. The aromatic amide compound is an important chemical intermediate, and the synthesis method is mild in reaction condition and high in yield.

The invention relates to a porous CoV2O6 nanosheet electrode material and a preparation method thereof, the nanometer has a uniform morphology, the dimension is 4-10 mu m, the surface has an obvious porous structure, the aperture is 10-50 nm, and the nanometer is prepared by the following steps: 1) adding acetylene black into water, stirring the water, adding cobaltous acetate and stirring together, so that the acetylene black can be completely immersed into the water; 2) adding ammonium metavanadate into deionized water, dissolving with water-bath, adding the obtained solution drop by drop into the solution obtained in the step 1), stirring at normal temperature, and obtaining a precursor; 3) drying the obtained precursor in a water-bath condition, grinding and calcining with air, and obtaining the nanosheet. When the nanometer provided by the invention is used as a lithium ion battery cathode active material, high capacity and good cycle stability are shown; the invention has the advantages of simple technology, good feasibility, easy amplification and green chemistry.

The invention relates to a microporous ultra-thin soft carbon nanosheet electrode material, and a preparation method and an application thereof. The thickness of the microporous ultra-thin soft carbonnanosheet electrode material is 20-30nm, and the morphology is a nanosheet having a uniform size; the microporous ultra-thin soft carbon nanosheet electrode material has a surface with a pleated structure; and the microporous ultra-thin soft carbon nanosheet electrode material has a large number of micropores and defect sites at the edge of a crystal lattice to provide additional ion storage sites. The microporous ultra-thin soft carbon nanosheet electrode material provided by the invention has the beneficial effects that the microporous ultra-thin soft carbon nanosheet electrode material hasa larger specific surface area and a large number of microporous structures than the conventional soft carbon electrode material, thereby and not only enhancing the diffusion performance of ions in amaterial body, but also increasing active interfaces between the material and the electrolyte, enhancing the kinetics of the material in an electrochemical reaction process, improving the capacitivecapacity contribution, exhibiting excellent rate performance and and achieving rapid charge and discharge.