38results about How to "Does not require high temperature and pressure" patented technology

The invention discloses a preparation method of N-doped porous carbon coated nano-particles (Co@Ir/NC-x, and x is the quality ratio of Ir) of a Co-Ir core-shell structure and application of the N-doped porous carbon coated nano-particles of the Co-Ir core-shell structure to catalytic water splitting. The preparation method has the advantages that (1) the preparation process is simple and direct, and energy consumption is low, specifically, Co/NC obtained after a zeolite imidazole framework material (ZIF-67 for short) is calcined is directly subjected to Galvanic replacement with Ir<3+> at theroom temperature, high temperature and high pressure are not needed, and accordingly the energy consumption is low; (2) the catalytic performance is good, and the stability is high, specifically, a Co@Ir/NC-10% sample is in a 1M KOH solution, in an oxygen producing test, the current density is 10 mA cm<-2>, the overpotential is 280 mV, and the performance is higher than IrO2; in a hydrogen producing test, the current density is 10 mA cm<-2>, the overpotential is -121 mV; besides, after a stability test of 12 h, the oxygen producing activity of IrO2 is attenuated by 55.8% while the oxygen producing activity of Co@Ir/NC-10% is attenuated only by 20.6%, and the hydrogen producing stability of Co@Ir/NC-10% is far higher than that of commercial Pt/C under the same conditions; and (3) the catalyst cost is low and the Co source is wide, specifically, the nano-particles are of the core-shell structure with Co as a core and Ir as a shell, the amount of Ir is reduced on the basis of more exposedcatalytic activity sites, a core metal precursor Co is wide in source and low in cost, the catalyst cost is greatly reduced, and great commercial application prospects are achieved.

The invention discloses a preparation method of PbSxSe1-x ternary nanocrystal. The method disclosed by the invention comprises the following steps of: mixing selenium powder and sulfur powder according to a certain proportion, slowly adding alkylamine which has long chain and has boiling point more than 180 DEG C, sufficiently stirring, heating (the selenium powder and the sulfur powder) amine mixed liquor into 180-260 DEG C, forming into settled solution at constant temperature, and adding the alkylamine which is dissolved with lead chloride and has the long chain and the boiling point more than 180 DEG C, so that a system is naturally cooled into room temperature after being sufficiently reacted, adding 10mL of chloroform into the system, and adding ethanol of which the volume is twice as high as the volume of the reaction solution into the reaction system, so that PbSxSe1-x ternary nanocrystal particle precipitate is separated out, therefore, the PbSxSe1-x ternary nanocrystal particle can be obtained.

The invention discloses a preparation method of a MnO<2>/Ti<3>C<2>T<x>Mxene flexible supercapacitor electrode material, and belongs to the technical field of energy storage materials. According to thepreparation method, MnO<2>and Ti<3>C<2>T<x>Mxene are combined to prepare the flexible supercapacitor electrode material with high electrochemical performance and mechanical property. Specifically, LiF and HCl are used as corrosive liquids, and an Al layer of Ti<3>AlC<2> is corroded to obtain Ti<3>C<2>T<x>; then MnCl<2>.4H<2>O and Ti<3>C<2>T<x> are mixed and heated at a certain mass ratio to be subjected to a redox reaction under the effect of KMnO<4> to enable the generated MnO<2> nano rods to be deposited on Ti<3>C<2>T<x>; and finally, washing and drying are carried out to obtain the flexible supercapacitor electrode material. According to the invention, MnO<2>with excellent specific capacitance is utilized, and specific to the defect that the conductive performance thereof is poor, an in-situ deposition method is adopted; the MnO<2> nano rods are deposited on the Ti<3>C<2>T<x>Mxene material with excellent conductivity to obtain the flexible MnO<2>/Ti<3>C<2>T<x>Mxene composite electrode material, so that not only rapid transmission of electrons is ensued, but also the resistance of the system is lowered; and the capacitor prepared by the electrode material has the characteristicsof high flexibility, excellent cycling stability, high energy density and the like.

The present invention belongs to the field of micron/nanometer material preparing technology and hydrothermal synthesis technology, and is especially low temperature process of preparing RE borate crystal with oxide as precursor. In the hydrothermal system, insoluble RE oxide and hydrated boron trioxide or boron trioxide as the boron source and precursor are reacted at 190-280 deg.c for 12-48 hr, and through further washing, the required RE borate crystal is obtained. The present invention provides one inorganic synthesis way, and the production process has no any pollution. The present invention has simple technological process, easy-to-constitute reaction system, high product purity and other advantages, and is suitable for industrial production.

The invention discloses an enzymatic beating process for natural-color bagasse pulp. Xylanase is used in the enzymatic beating process for the natural-color bagasse pulp. The process comprises the steps of sizing agent defibering, enzyme treatment, washing, PFI beating, sheet making and physical detection. By adopting the process, the beating energy consumption of the natural-color bagasse pulp can be lowered effectively; the beating degree can be increased greatly up to 19.2 percent when enzyme treatment is performed on the xylanase at the dry pulp dosage of 30IU/g; meanwhile bagasse pulp cellulase can be protected from being damaged, and the process has important significance to the production of industrial paper from bagasse pulp.

The invention provides a preparation method of 1,2,3-trimethoxy-5-allylbenzene. The synthetic route of the preparation method is as shown in the specification. According to the preparation method disclosed by the invention, the synthetic process conditions are simple, the cost is low, the total yield of the reaction can be above 49% and the preparation method is suitable for industrialized mass production and has significant business values.

Disclosed is a method for preparing an aromatic azoic compound by catalyzing aromatic amine with metal nanocrystals. In the method, the aromatic amine serves as a substrate, the metal nanocrystals serve as catalysts, the substrate, the catalysts and alkali are dissolved in organic solvents in normal-pressure air atmosphere, and the aromatic azoic compound is prepared by means of reaction. The method has the advantages of simplicity and convenience in process, environmental friendliness, catalyst recyclability, high universality of metal catalysts and the like, and avoids the shortcomings that environment-unfriendly metal salt catalysts or oxidants are used in an existing synthetic route, high temperature and high pressure are needed, the catalysts are poor in universality, asymmetric aromatic azoic compound is synthesized by a two-step method and the like. A series of aromatic azoic compounds can be prepared, and the method has a wide industrial application prospect.

The invention relates to a preparation method of N-butyl-1,2-benzo isothiazolin-3-ketone. The preparation method comprises the steps that 2,2'-disulfide diphenyl formyl chloride serves as a raw material and is transformed into N-butyl-2,2'-disulfide diphenyl formyl amine by amidation; and an oxidant is added to disproportionately synthesize N-butyl-1,2-benzo isothiazolin-3-ketone in an alkaline environment and with the existence of a catalyst. The preparation method has the following characteristics that (1), the oxidant (or an oxygen releasing agent) is adopted to replace halogen (chlorine or liquid bromine), the defect of using highly toxic chemicals is avoided, the operation is easier, the cost is lowered, and the pressure of environmental protection is reduced greatly; (2), the process during a reaction course is simple and high temperature and high pressure are not needed; and (3), the preparation method is simple in process, low in manufacturing cost, high in product yield, and suitable for commercial production, and the process is clean and does not pollute an environment.

The invention belongs to the technical field of nanometer energy materials, and discloses a novel burning rate catalyst. The burning rate catalyst is characterized in that graphene aerogel is taken asa carrier, and a metallic oxide is taken as a carried matter and is dispersed in the graphene aerogel in the form of nanoparticles. The invention further discloses a preparation method of the burningrate catalyst. The burning rate catalyst disclosed by the invention has a larger specific surface area, a larger large pore volume, high heat conductivity and high catalytic activity; transitional metallic oxide nanoparticles are uniformly dispersed inside the aerogel without aggregation; the burning rate catalyst has excellent catalytic activity. The preparation process of the catalyst is simple, and the reaction conditions are mild.

The invention provides a refining method of methyhaaltrexone bromide, belonging to the technical field of chemical drug synthesis. According to the refining method, the methyhaaltrexone bromide is separated and purified by inverse silica gel column chromatography, and the procedure of recrystallization on a methyhaaltrexone bromide product by a mixed solvent of methanol and water can be added before and after the inverse silica gel column chromatography. According to the refining method, the conditions are mild, the yield is high, the purity of refined products is high, and the generated product meet the requirement on purification of medical methyhaaltrexone bromide preparation, so that the method is applicable to industrialized mass production.

The invention discloses a method for treating poisonous organic pollutant solid waste through ball milling mechanochemistry with manganese dioxide as an oxidant and reaction raw materials and preparing manganic oxide simultaneously and belongs to the technical field of waste treatment and new material preparation. According to the method, under the normal temperature and normal pressure, the organic solid waste and the manganese dioxide are put in a planetary ball milling reactor in a mixed mode, and oxidation reaction of the manganese dioxide and organic pollutants is reinforced by a mechanical force effect. On the one hand, fast degradation and deep mineralization of the organic pollutants are achieved; and on the other hand, reduction of the manganese dioxide is achieved, peroxymonosulfate can be activated by the manganic oxide, the reduzate of the manganese dioxide, and converted into sulfate radical anions, and then the poisonous organic pollutants in water are treated. The method has the following advantages that the treating process of the poisonous organic pollutant solid waste is simple, reaction conditions are mild, and oxidation and mineralization are thorough; and meanwhile, after reaction, the catalyst manganic oxide activating the peroxymonosulfate can be prepared by the oxidant used by treatment reaction.

The invention discloses a method for preparing fiberized soybean protein gel under an acidic condition, which belongs to the technical field of processing of vegetable protein. The fiberized soybean protein gel is finally obtained through preparation of a soybean aqueous extract, preparation of soybean protein liquid, preparation of a protein solution system and heat treatment. The fiberized soybean protein gel is prepared by utilizing the principle of protein molecule hydrolysis, polymerization and crosslinking under the acidic condition, can be used as a base material of artificial vegetarian meat or a substitute of animal protein, can effectively make up for the defects in the aspect of animal protein resources in China, and has great significance in the aspects of environmental protection, greenness and health.

The invention provides a preparation of calcium sulfate whiskers. The preparation method comprises the following steps of dividing a reaction vessel into a cathode chamber and an anode chamber by using an anion exchange membrane; adding a cathode plate to the cathode chamber; adding an anode plate to the anode chamber; adding a soluble sulfate water solution into the cathode chamber; adding a soluble calcium salt water solution into the anode chamber; switching on a direct-current power supply; obtaining needle-shaped calcium sulfate whiskers in the cathode chamber after regulating pH (Potential of Hydrogen) and applying voltage.

The invention discloses a preparation method of butynedioic acid. The method comprises the following steps of: (1) firstly, carrying out water-free and oxygen-free treatment on a closed reaction kettle; (2) putting calcium carbide, a solvent, a catalyst and an auxiliary agent into the reaction kettle, introducing carbon dioxide into the reaction kettle, and heating and pressurizing for reaction; (3) separating the reacted mixture obtained in the step (2) to obtain a liquid mixture, and adding a KOH solution into the liquid mixture; stirring to separate out a white precipitate; and dissolving the white precipitate in hot water, acidifying with concentrated sulfuric acid, cooling, separating out the white precipitate, and filtering to obtain the product. The synthesis method disclosed by theinvention is relatively environment-friendly and low in production cost.

The invention discloses a method for preparing organic acid by oxidative degradation of biomass and a prepared organic acid, which relate to the field of biomass reuse and solve the problems of high energy consumption, high cost, harsh reaction conditions, large residue amount and environment pollution existing in conventional biomass degradation and utilization methods. The method comprises the following steps: biomass and acetic anhydride are uniformly mixed according to a solid-liquid ratio of 1g:(5ml to 30ml) under magnetic stirring, and 30 percent of hydrogen peroxide is dripped by a constant-pressure drop funnel; the mixture is oxidized under the condition of 35 DEG C to 85 DEG C for 6 to 48 hours; filtration is performed to obtain an oxidized solution; the oxidized solution is driedby evaporation in water bath, so as to obtain residue; and the residue is separated by column chromatography, so that the organic acid is obtained. By oxidatively degrading an organic matter in the biomass under mild conditions, the chemical with high added value-the organic acid can be obtained, establishing a novel method for the application of biomass. The method has the advantages of low energy consumption, low cost, less residue and no environment pollution.