52results about How to "Meet the development requirements of green chemistry" patented technology

The invention relates to a vanadyl phosphate catalyst as well as a preparation method and application thereof. The method comprises the following steps: 1) mixing a vanadium source, a choline chloride-organic carboxylic acid eutectic solvent and an alcohol, and performing a reaction, wherein the alcohol is benzyl alcohol, or a mixture of a C3-C8 monohydric alcohol and the benzyl alcohol; 2) mixingthe obtained reaction product with a phosphorus source, raising temperature until the temperature is higher than a melting point of the eutectic solvent, and continuing a reaction to obtain a vanadylphosphate precursor; and 3) performing calcination to obtain the vanadyl phosphate catalyst. The method provided by the invention uses the green cheap eutectic solvent to intensively prepare the vanadyl phosphate catalyst, and overcomes the disadvantages that a vanadyl phosphate catalyst relies on precious metals to improve performance, secondary pollution is generated, costs are high and a preparation process is complicated; and the vanadyl phosphate catalyst provided by the invention improves the difficult problems of a low yield and poor selectivity when being used for catalyzing a reaction of preparing maleic anhydride by selective oxidation of n-butane, and overcomes the disadvantages of high costs and large pollution in a conventional catalyst improving method.

The invention relates to a VOPO4 catalyst as well as a preparation method and an application thereof. The method comprises the steps as follows: 1) a vanadium source, a deep-eutectic solvent and alcohol are mixed to react; 2) an obtained product is mixed with a phosphorus source, the mixture is heated to the temperature higher than the melting point of the deep-eutectic solvent to react continuously, a precursor is obtained and roasted, and the VOPO4 catalyst is obtained. The deep-eutectic solvent is any one of or a combination of at least two of urea-polyethylene glycol, urea-metal chloride,urea-choline chloride or thiourea-polyethylene glycol; the alcohol is benzyl alcohol or a mixture of C3-C8 monohydric alcohol and benzyl alcohol. The method overcomes the defects that VOPO4 catalystsdepend on precious metals to improve the performance of the VOPO4 catalysts, cause secondary pollution, are high in cost and complex to prepare and the like. The problems of low yield, poor selectivity and the like are solved and the defects of high costs and severe pollution in traditional catalyst improvement methods are overcome when the VOPO4 catalysts are applied to catalyze a reaction for preparing maleic anhydride through n-butane selective oxidation.

The invention provides a process for preparing Guerbet alcohol. The process comprises the following steps: (a) weighing 100-200g of a fatty alcohol, a solid base catalyst and a nickel-based catalyst, adding into a three-necked flask which is provided with a thermometer, a water distributor, a reflux condensing tube, a nitrogen introducing tube and a magnet stirrer, introducing nitrogen into the three-necked flask continuously, increasing temperature to 200 DEG C rapidly, carrying out reaction for 1.5 hours, decreasing temperature after reaction, filtering a product of reaction at room temperature, separating the catalysts from the product of reaction, and distilling an obtained filtrate by reducing pressure to obtain a product, wherein the weight of the solid base catalyst is 5-15% of that of the fatty alcohol, and the weight of the nickel-based catalyst is 0.5-5.5% of that of the fatty alcohol; and (b) adding the product obtained in the step (a) and a nickel-based catalyst into a sealed reactor, replacing air in the reactor with nitrogen, controlling the pressure at 0.1-2.0MPa and the temperature at 120-280 DEG C with hydrogen, carrying out reaction under pressure for 1-3 hours, cooling a product of reaction to normal temperature, filtering to obtain a high-purity product, and measuring the iodine number, wherein the weight of the nickel-based catalyst is 1-5% of that of the product obtained in the step (a). The process provided by the invention has the advantages of strong operability, simple post-treatment process and significant improvement of product purity and is suitable for industrial production.

The invention relates to a novel method for preparing a porous crosslinked chitosan microsphere, and in particular relates to a method for preparing a crosslinked chitosan microsphere by using 1,2-cyclohexanediol diglycidyl ether as a crosslinking agent. According to the novel method, commercially available chitosan, 1,2-cyclohexanediol diglycidyl ether and chlorinated paraffin are used as raw materials, and the porous crosslinked chitosan microsphere is prepared by dissolution, dispersion into spheres, hole preparation, crosslinking and drying. The method has the characteristics of mild reaction conditions, simple preparation steps, high comprehensive resource utilization rate, no harmful substances and the like. The crosslinked chitosan microsphere prepared by using the method has the characteristics of capability of biodegradation, good acid-alkali resistance, good adsorption effect on acid ions and proteins, strong load capacity on heavy metal ions and the like, and can be applied to the field of food, medicine, chemical industry and the like.

The invention discloses an oxidation cleaning disinfector which comprises the following raw materials in parts by weight: 1-3 parts of peracetic acid, 8-24 parts of hydrogen peroxide, 7-21 parts of acetic acid, 2-8 parts of iminodisuccinic acid, 1-3 parts of sodium dodecyl diphenyl ether disulfonate and 60-90 parts of deionized water. The oxidation cleaning disinfector is easily soluble in water,low in foaming, convenient to use, quick and thorough in sterilization, high in cleaning efficiency and good in disinfection effect; no residual toxicity is available on a disinfected article; a decomposition product is innocuous to a human body; and the disinfector has high cost performance, is convenient to popularize and apply and can achieve good economic benefits.

The invention relates to a preparation method of a hydrotalcite-assisted vanadium-phosphorus-oxygen catalyst with assistance of hydrotalcite. The preparation method comprises the following steps: preparing a vanadium-phosphorus-oxygen precursor: mixing a vanadium source, benzyl alcohol and C3-C8 monohydric alcohol to obtain a mixture, adding a phosphorus source, carrying out heating to 100-200 DEGC, continuing reacting, and filtering and drying a product to obtain the vanadium-phosphorus-oxygen precursor; preparation of a hydrotalcite additive: dissolving a water-soluble inorganic zinc source, an inorganic magnesium source and an inorganic aluminum source in water, adding an alkali source, carrying out heating to 65-200 DEG C for a reaction, conducting cooling, then performing aging for 6-12 hours, conducting filtering, washing and drying, and carrying out roasting at 350-550 DEG C to obtain the hydrotalcite additive; and preparation of the hydrotalcite-assisted vanadium-phosphorus-oxygen catalyst: mixing the hydrotalcite additive with the vanadium-phosphorus-oxygen precursor according to a mass ratio of (1-10): 100, carrying out heating to 300-500 DEG C, and conducting roasting to obtain the hydrotalcite-assisted vanadium-phosphorus-oxygen catalyst.

The invention discloses a preparation method of petaloid sodalite at room temperature and belongs to the technical field of zeolite materials. The method comprises the following steps: weighing sodium hydroxide and an aluminum source, adding deionized water, and heating and stirring the mixture till the raw materials are fully dissolved to prepare a solution A; weighing a silicon source, adding deionized water, and heating and stirring the mixture till the raw materials are fully dissolved to prepare a solution B; uniformly mixing the solutions A and B; crystallizing the mixture at room temperature; and after crystallization, washing the mixture till the pH of the washing solution is 8-9, and drying the filter cake at 80-120 DEG C for 12-36h to obtain sodalite. The preparation method disclosed by the invention is performed at room temperature, and is mild in condition, free of organic additives and pollution-free; the preparation method is simple in synthesizing step, short in consumed time and low in cost; and the product is high in crystallizing property and high in purity, and the synthesized sodalite has a shape of sodalite, so that the adsorptive action thereof is facilitated, and the sodalite is suitable for scaled production.

The invention discloses a P/N/Si multi-element synergistic integrated nano flame retardant as well as a preparation method and application thereof. The flame retardant comprises a transition metal organic framework, and a phytic acid coating layer and a SiO2 coating layer which sequentially coat the transition metal organic framework. The preparation method comprises the following steps: preparing the transition metal organic framework MOF; dropwise adding a certain amount of phytic acid into a MOF uniform suspension, carrying out stirring reaction at room temperature, and after the reaction is finished, centrifuging, washing and drying to obtain MOF@PA; and growing SiO2 on the surface of the MOF@ PA by taking the MOF@ PA as a core and adopting a sol-gel method. The flame retardant combines excellent characteristics of flame-retardant elements such as P, N, Si, transition metal and the like, not only can play a synergistic role to improve the flame-retardant effect and effectively inhibit release of toxic smoke, but also can be widely applied to high polymer materials such as polyurethane, epoxy resin, polypropylene and the like to improve the flame-retardant property of the high polymer materials and reduce the possibility of casualties.

The invention relates to a cyclic phosphamide derivative with a biaryl skeleton and a synthesis method and application thereof, belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing the cyclic phosphamide derivative with the biaryl skeleton by utilizing an electrochemical catalysis intramolecular phosphine amination reaction. The method has good applicability to mono-substituted or di-substituted electron withdrawing groups and electron donating groups on ortho, meta and para positions on a ring A and a ring B in a biaryl phosphamide compound structure, and a substituent R can be an electron donating alkyl group or an electron withdrawing group, so that the method has small influence on the yield of the corresponding product. Compared with the prior art, on one hand, the method has wide substrate universality, good reaction selectivity and high molecular conversion rate and yield; on the other hand, reaction conditions are mild, a catalytic mode is green and efficient, and operation steps are simple. The cyclic phosphamide derivative with the biaryl skeleton prepared by the method can be used for preparing various organic PN ligands and organic photoelectric materials through chemical conversion.