61results about How to "Achieve green synthesis" patented technology

The invention discloses an acid ion liquid and synthesizing method and application based on 1-methyl-3-benzyl imidazole cation, which is 1-methyl imidazole benzyl methylation organic cation, wherein the inorganic/organic anion is BF4<->,HSO4<->, H2PO4<->, p-CH3C6H4SO<3->, CF3COO<-> and ClCH2COO<->, wherein the ion liquid is liquid phase under indoor temperature, which can repair structure as mother compound due to leading functional group into structure, such as benzene ring, methylene and so on; the BrPhinsted acid can be repeating ring, reacting dielectric and reacting catalytic, which can be used to synthesize important perfume and solvent.

The invention belongs to the technical field of organic chemical industry production, and relates to a device for preparing isocyanate by pyrolyzing aminoalkyl esters. A major structure comprises a pyrolysis reaction kettle, three tower columns, two H distilling heads and three receiving pots; the top part of the pyrolysis reaction kettle is communicated with the bottom of sieve plate tower columns by a tower body support; the top part of a lower sieve plate tower column is communicated with the bottom of an oblique H distilling head; the top part of the oblique H distilling head is connectedwith the bottom of a middle packing tower column; an outlet of the oblique H distilling head is respectively communicated with a product receiving pot; the top end of the middle packing tower column is communicated with the bottom end of a horizontal H distilling head; the top part of the horizontal H distilling head is communicated with the bottom of an upper packing tower column; an outlet of the horizontal H distilling head is communicated with a byproduct right receiving pot; and the top part of the packing upper sieve plate tower column and the product receiving pot are communicated witha cold trap respectively. The device has simple structure, reliable principle, easy control of operation and use, high efficiency, strong reaction selectivity and low manufacture cost.

The invention relates to a method for synthesizing cefprozil through an enzymatic method. According to the method, a cefprozil parent nucleus, D-para hydroxybenzene glycine methyl ester and/or D-para hydroxybenzene glycine ethyl ester, water and penicillin acylase react at the temperature of 10 DEG C-25 DEG C to obtain a crude cefprozil product and enzyme reaction mother liquor, the temperature is controlled to be 0 DEG C-15 DEG C, a pH value is controlled to be 0.2-0.8, N,N-dimethyl formamide is added, the mixture is stirred uniformly, a seed crystal is added for crystal growing, the pH value is adjusted to be 5.5-6.5, and the temperature is controlled to be 10 DEG C-30 DEG C to obtain a cefprozil N,N-dimethyl formamide compound; the temperature is controlled to be 0 DEG C-25 DEG C, water and the cefprozil N,N-dimethyl formamide compound are added into a reactor, the mixture is stirred for crystal transformation for 1-4.5 h, and then filtering, washing, swabbing-off and drying are carried out to obtain a finished cefprozil product. The cefprozil is high in product yield and high in purity, appearance is white, the preparing method is simple and easy to implement, the condition is mild, and the method is more suitable for industrial production.

The invention discloses a green synthesis method of an acrylonitrile polymer. In particular, under the condition of <60>Co ray irradiation, an RAFT technique is used and an initiator CPDN is taken as an RAFT reagent to realize controllable synthesis of a PAN polymer at room temperature. Furthermore, the conditions of irradiation dose rates, the ratio of a monomer and a chain transfer agent, monomer concentration, reaction time and the like are changed, and a series of polymerization is performed to provide the new green synthesis method for carbon fiber materials taking PAN as a substrate.

The invention relates to a synthetic method of o-chlorobenzylmagnesium chloride. A reaction is carried out by using a specific solvent at the molar ratio of o-chlorobenzyl chloride to magnesium chips being 1: 1.1-1:3.0, preferably 1:1.5. Especially, a reaction trigger step exists in specific process. Especially after reaction triggering, temperature rises to 35-80 DEG C, preferably 35-45 DEG C. By the synthetic method, the purposes of easy industrialization, reaction safety, high yield, less side reaction and green synthesis can be achieved.

The invention provides a method for prepating emamectin benzoate. The method comprises four steps: a 5-hydroxyl protection and 4''-hydroxyl oxidation reaction, an aminoation-reduction, a deprotection reaction and a salt forming reaction, wherein 5-hydroxyl protection selects a protective agent which is selected from p-methoxyphenol methyl, p-methoxybenzyl, p-methoxyphenol methyl chloride, 2-(trimethylsilyl)ethoxycarbonyl, dimethoxy benzoyl methane, chloromethyl 2-ethyl ether and 2-(trimethylsilyl)ethloxymethyl. The method overcomes generation of a by-product by a reaction intermediate, so that yield and purity of the product are greatly increased, purification is easy, and the method has the characteristics of easy control of the production process, high yield and environmental protection.

The invention discloses a colorimetric detection method for an aryloxyphenoxypropionate herbicide based on a magnetic nanocrystal enzyme preparation, which comprises the steps of simultaneously embedding magnetic Fe3O4 nanoparticles MNPs, an AOPP herbicide hydrolase QpeH and ethanol oxidase AOx in a ZIF-8 crystal through a one-step synthesis method to prepare the magnetic nanocrystal enzyme preparation QpeH/AOx@mZIF-8, and detecting AOPP herbicide residues in an environmental sample through a colorimetric method by using the magnetic nanocrystal enzyme preparation as a biological enzyme sensor. According to the invention, the characteristics of stability, simplicity and low cost of the nano enzyme MNPs are effectively utilized, and the characteristics of strong specificity and high activity of the biological enzyme (QpeH, AOx) are combined to prepare the QpeH/AOx@mZIF-8 multi-enzyme system sensor, so that the problem that the AOPP herbicide is difficult to accurately, quickly and real-timely detect is effectively solved.

The invention discloses a synthetic method of noble metal nano-particles. The synthetic method comprises the following steps of dispersing a water extract of a pyrus betulaefolia stem in a noble metalsolution to react to obtain noble metal nano particles, wherein the noble metal is selected from gold or/and silver. According to the synthetic method of the noble metal nano-particles, the water extract of the pyrus betulaefolia rod is taken as a reducing agent and a stabilizer, a chloroauric acid or silver nitrate solution is used as a raw material, the reaction time is short so as to prepare the uniformly-distributed noble metal nano-particles. A transmission electron microscope shows that the size distribution of the synthesized noble metal nano particles is uniform, the average size of the gold nano particles is about 52.2 nm, the average size of the silver nano-particles is about 19.9 nm, and the silver nano-particles have good dispersity. According to the synthetic method of noblemetal nano-particles, the raw materials are safe and harmless, the reaction time is short, the reaction temperature is only normal temperature, and therefore, the synthetic method is expected to be widely applied to the aspect of green synthesis of noble metal nanoparticles.

The invention is a manufacturing method for phosphate textile assistants. At first, the P2O5 is added into high molecular aliphatic hydrocarbon and its derivant solvent of mineral oil long carbon chains or plant oil dispersing solvent, they are blended evenly to be used as phosphorylation agent; castor oil or dewatered wool grease are heated to 30-60 degrees and adds in phosphorylation agent, adds in water to hydrolyze them after the heating reaction to produce acid phosphate ester; decreases the temperature to below 50 degrees, then adds in natrium oxyhydrogen to neutralize, heats up and stirs, adds in water to control the solid content between 45%-85%.

The invention provides a glycosyl azido compound shown as formula I and capable of specifically recognizing Pseudomonas aeruginosa, a glycosyl compound containing the glycosyl azido compound and shownas formula IIa or IIb, and a biological antibacterial material containing the glycosyl compound; in the formulas, R is glycosyl. The biological antibacterial compound can provide more thorough antibacterial effect; the diagnostic and treatment range of Pseudomonas aeruginosa is expanded from in-vitro free state to in-vivo skin affected tissues and in-vivo bone repair materials.

The invention discloses a preparation method of a dendritic hollow zinc oxide nanorod array, and belongs to the technical field of material science and engineering. The method comprises the followingsteps: carrying out surface treatment on a zinc sheet; performing compression molding; conducting unloading; performing demolding; and standing in an alkaline solution. According to the method, high-temperature and high-pressure conditions of a traditional hydrothermal method are not needed, meanwhile, use of any organic additive is avoided, and in addition, an additional zinc source is not introduced in the synthesis process. According to the method, the dendritic hollow zinc oxide nanorod array with good crystallinity and controllable morphology is prepared by utilizing a soaking method under the conditions of low temperature and normal pressure. The method has the advantages of simplicity in operation, low cost, environmental friendliness and the like, is expected to realize large-scalecontrollable preparation of the dendritic hollow zinc oxide nanorod array, and has important and profound significance for revealing the growth principle of zinc oxide and promoting the practical application of zinc oxide.

The invention discloses a preparation method for green synthesis of N-acetyl-5-methoxytryptamine. Diethyl malonate and acrylonitrile are used as initial raw materials, and the product N-acetyl-5-methoxytryptamine is obtained through addition, hydrogenation, coupling, cyclization, ring opening, decarboxylation and acylation reaction processes. According to the addition reaction, impurities in a reaction system are removed by adopting a water extraction mode, so that the problems of high energy consumption, high product loss and the like caused by separating an intermediate by adopting a high-temperature and high-vacuum distillation mode in the prior art are avoided; and in the processes of coupling reaction, cyclization reaction, ring-opening reaction, decarboxylation reaction and acylation reaction, water is used as a reaction solvent, the reaction process is safe and environment-friendly, green synthesis is effectively realized, and the method is suitable for industrial actual production.

The invention discloses a fatty alcohol polyoxypropylene ether oxyacid or the salts thereof, and a preparation method. With the preparation method adopted, irritant and harmful substances in a final product can be greatly reduced, the polymerization process of epoxypropane is effectively controlled, and the narrow-distribution fatty alcohol polyoxypropylene ether oxyacid or the salt products thereof, such as fatty alcohol polyoxypropylene ether sulfate, the fatty alcohol polyoxypropylene ether carbonate, the fatty alcohol polyoxypropylene ether phosphate and the like are obtained,so that the quality of theoxyacid and the salt products thereof is greatly improved, and the theoxyacid and the salt products thereof have great advantages in application.

The invention discloses a method for preparing benzimidazolone in a water solvent. The method comprises the following steps: adding an aqueous solution of an additive into a reaction bottle, startingstirring, carrying out heating to 90-140 DEG C, adding o-phenylenediamine and urea, carrying out a heat-preserved reaction for 3-8 h, adding the aqueous solution of the additive or mother liquor afterthe reaction is completed, carrying out suction filtration, performing leaching with water to obtain a solid material which is benzimidazolone, indiscriminately using the mother liquor, concentratinga leaching solution, and indiscriminately using the leaching solution. A technical scheme for synthesizing benzimidazolone by taking water as a solvent under the condition of normal pressure is realized, the yield of benzimidazolone is greater than 99%, and the purity of benzimidazolone is greater than 99%. The method of the invention uses water as a solvent and realizes indiscriminate usage of the mother liquor, so the method is environment-friendly, safe and feasible, and is low in production cost and suitable for industrial production.

The invention provides a preparation method of fotemustine. The preparation method comprises the following steps: carrying out an aminolysis reaction between 1-amino ethyl diethyl phosphate and carmustine in a reaction medium to obtain a compound shown in a formula (II), wherein the reaction medium comprises water; and carrying out nitrosation on the compound shown in the formula (II) to obtain fotemustine. The method provided by the invention can prepare fotemustine with the yield being greater than 25% and the purity being higher than 99.73%. In addition, by using carmustine as a raw material to replace a highly toxic liquid reagent 2-chlorethyl isocyanate, environment-friendly synthesis of fotemustine is realized; therefore, the preparation method is more suitable for industrial production.

The invention discloses a method for preparing a large-pore mesoporous molecular sieve. According to the method, a mesoporous molecular sieve with different topological structures is synthesized by using the methods reported in literature, then a certain amount of mesoporous molecular sieve raw powders or roasting samples are mixed with a solution containing small molecule organic ammonium with a certain concentration, and the large-pore mesoporous molecular sieve is prepared through controlling the crystallization temperature and crystallization time by using hydrothermal synthesis. The synthesis method is simple and has high repeatability, and the mesoporous molecular sieve finally obtained has higher hydrothermal stability; and in addition, the synthesis method does not need additional silicon sources, the synthesis cost is reduced, and the method is an environment-friendly synthesis method.

The invention relates to a system for producing hydrogen and ammonia by using clean energy. The method is characterized in that a water electrolysis hydrogen production technology and an ammonia synthesis technology are combined, clean energy is coupled for power generation, hydrogen energy is stored and transported in the form of liquid ammonia while zero-carbon-emission hydrogen production is achieved, and the problems that hydrogen energy storage and transportation are difficult, ammonia synthesis industry carbon emission is high, and a hydrogen energy production place and a terminal application place are mismatched are effectively solved; and the application scene of hydrogen energy is greatly widened.