64results about How to "Synergistic catalytic effect is good" patented technology

The invention discloses a method for preparing composite photocatalyst containing activated carbon coating. In the method, activated carbon as coating is attached on foam material matrix, so that activated carbon coating material is formed, the activated carbon coating material is used as carrier to carry titanium dioxide, wherein the titanium dioxide as an active component is 1 percent to 10 percent by weight, the activated carbon coating is 4 percent to 15 percent by weight, and the balance is the foam material matrix. Since the method uses the activated carbon coating as photocatalyst carrier, the dispersibility of the titanium dioxide as an active component can be effectively enhanced, the defects of the traditional activated carbon material, including loose structure and low strength, are overcome, the transmission of light in a system is improved, the process of transferring pollutant to the catalyst surface is improved, and moreover, the service life of activated carbon can be greatly prolonged.

The invention relates to a hydrogen storing alloy for a rare earth capacitor battery and a preparation method thereof, and belongs to the technical field of novel energy resource and efficient energy conservation. The alloy provided by the invention is prepared by adding nanoscale Co3O4 and nanoscale Ceo2 into rare earth metals and metals. The mass ratio of the nanoscale Co3O4 and nanoscale Ceo2 is 1:(1-2). The rare earth metals are La, Ce, Pr and Nd, while the metals are Ni, Co, Mn and Al. The preparation method comprises the following steps of: mixing the rare earth metals and metals, performing vacuum induction melting, cooling to obtain an alloy ingot and shelving for 10-30 days; adding the nanoscale Co3O4 and CeO2 for air crushing, compacting, and performing vacuum heat treatment; and air crushing and packaging to obtain a product. A metal oxide covers the surface of the particles of the hydrogen storing alloy as an efficient catalyst without surface treatment, so that the quality demand of a cathode battery material for the rare earth capacitor battery is met. In accordance with a primary preparation principle, constant temperature shelving and vacuum treatment are combined to uniformly distribute the components of the hydrogen storing alloy.

The present invention provides one-section hydrogenation process for producing food level white oil. By using vacuum gas oil, deasphalted solvent oil and Fischer-Tropsch process oil as material, and hydrogenating catalyst containing modified beta-molecular sieve in 1-9 wt%, and through hydrocracking or hydrogenating, hot high pressure separating out gas and light distillate to obtain liquid product, mixing with newly formed hydrogen, and high pressure hydro-finishing in a reactor with loaded reduction type hydrogenating catalyst, food level white oil is produced. The process is simple and has high product quality.

The invention discloses a construction method of an indium oxide photocatalysis composite material. The purpose of the construction method is that the indium oxide photocatalysis composite material isprepared by stirring and mixing carbon quantum dots doped with non-metallic elements and an indium oxide composite material under a normal temperature and pressure. The construction method has the advantages that (1) a composite photocatalysis material has a hexagonal tubular microstructure, a high specific surface area and more active sites; (2) the obtained indium oxide nanocomposite material fully combines the excellent photocatalysis ability of nanometer indium oxide and the compound action of the carbon quantum dots to inhibit the photogenerated electron-hole, and the synergistic catalysis effect is excellent; (3) reaction conditions constructed by a target material are simple, equipment requirements are low, and a preparation method is simple; (4) the catalytic effect of the targetmaterial is excellent; and (5) deionized water and ethanol are taken as reaction mediums in a reaction, the environment is friendly, and industrial amplification is easy.

The invention discloses a catalyst coating material for automobile tail gas purification. The catalyst coating material comprises an oxygen storage layer and a catalytic active layer, wherein the oxygen storage layer is located at a lower layer, and the catalytic active layer is located at an upper layer; the oxygen storage layer is formed through uniformly loading oxides of one or more of rare-earth metals or transition metals to porous mineral particles; and the catalytic active layer is formed through uniformly loading oxides of one or more of transition metals to porous mineral particles. The invention further discloses a preparation method for the coating material and a catalyst prepared by employing the coating material. The catalyst coating material disclosed by the invention fully consists of rare-earth and transition metal oxides and is completely free of noble metal elements, so that the preparation cost is low; and the load amount of metal elements is large, the number of catalysis sites is large, and the upper and lower layers have a very good synergistic catalysis action, so that the catalytic conversion efficiency is high, and the application prospect is good.

The invention relates to an acid-base bifunctional catalyst and a preparation method of the acid-base bifunctional catalyst. The catalyst comprises an active component and a carrier, wherein the active component is a basic metal oxide, and the carrier is aluminum oxide; and the catalyst also comprises an additive. The preparation method of the acid-base bifunctional catalyst comprises the following steps: impregnating activated carbon in a prepared active component precursor basic metal saline solution; and mixing and grinding the activated carbon impregnated with the basic metal saline solution and carrier precursor pseudo-boehmite, extruding into strips and molding, drying, and calcinating to prepare the catalyst. Al2O3 is used as the carrier and has weak acidity, so that the catalyst loaded with the active component has acid-base bifunction; the activated carbon is used as the early-stage additive, after calcining, the dispersivity of the basic center on the surface of the carrier is improved, the contact area between the basic center and the acidic center and reaction raw materials is increased, and the permeability of the catalyst is enhanced; a mechanical mixing method is adopted for preparation of the catalyst, so that the preparation process is simple, and the repeatability is good; and the additive is further added, so that the reaction selectivity and the yield are improved.

The invention discloses a preparation method of a tin sulfide / vegetable sponge nanocomposite. The technical key lies in that a target product is obtained by carrying out a reaction at high temperatureby taking natural vegetable sponge as a carrier and petal-shaped tin sulfide as a photocatalyst. The preparation method has the advantages that: (1) the vegetable sponge is natural, green, pollution-free, wide in source, cheap and available; (2) the reaction condition is simple, the equipment requirement is low, and the energy consumption is low; (3) the product is good in catalytic effect, highin catalytic efficiency and strong in circularity; and (4) the preparation method is safe and smooth in reaction, free of naked fire or smoke and easy to realize industrial amplification.

The invention relates to a preparation method of ethyl trimethoxy silane, aiming at solving the technical problem that a process and a device can be simple, usage and cost of a catalyst can be reduced, synthetic yield can be improved and desired products can be easy to be separated without adding additional solvent. The method in the invention comprises the following steps: 1) adding trimethoxy silane, catalyst and cocatalyst to a pressure-proof reaction kettle, wherein the mass ratio of the usage of catalyst to trimethoxy silane is 1*10<-6>-0.10, and the mass ratio of the usage of cocatalyst to trimethoxy silane is 5*10<-6>-0.10; 2) heating up to 0-150 DEG C under stirring, then continuously introducing ethylene for reaction; 3) stopping the reaction when the pressure in the reaction kettle is not decreased to obtain the synthetic product of ethyl trimethoxy silane; and 4) carrying out separation and extraction on the synthetic product to obtain ethyl trimethoxy silane.

The invention relates to a method for producing diesel oil through hydrogenation modification, modification, isomerization and decondensation of coal tar. Separating coal tar into residual oil and distillate oil, using distillate oil as raw material, adopting a single-stage or series process flow, under suitable operating conditions, distillate oil raw material and hydrogen pass through the catalyst bed to obtain low freezing point diesel products And a small amount of naphtha products with low sulfur and nitrogen content. It is characterized in that the catalyst bed includes a hydrogenation treatment catalyst bed containing 0.5-<20wt% of zeolite beta. The key point of this technology is that it can directly provide high-quality diesel products with low freezing point and high cetane number, and at the same time provide a suitable technological route for the rational application of coal tar.

Production of hydrogenated and pour-point reducing modified isomerization diesel oil is carried out by using fraction oil as raw material from one-stage or series process flow, passing fraction oil raw material and hydrogen gas into catalyst bed which consists of beta molecular sieve 1-9wt%, and obtaining clean high-quality diesel product and naphtha product with low sulfur nitrogen and high arene content. The beta molecular sieve has small crystal grain, low acidity, high silica-alumina ratio and crystallinity. It achieves simple process, higher productivity and less impurities, and improves density and freezing point.

The invention relates to a method for producing lubricating oil base oil from hydrogenated tail oil. Using hydrocracking tail oil as raw material, it can directly carry out vacuum distillation, and under suitable conditions, lubricating oil base oil products can be obtained. The hydrocracking tail oil is made of vacuum distillate oil, solvent refined deasphalted oil and Fischer-Tropsch synthetic oil as raw materials, and uses a hydrocracking catalyst containing modified β molecular sieves. Modified β-molecular sieve with high silicon-aluminum ratio, high crystallinity, and certain secondary pores, through hydrocracking or hydrocracking process, the tail oil with pour point less than -10°C can be obtained. The invention can produce lubricating oil base oil products with excellent performance by selecting the hydrogenated tail oil processed by suitable hydrocracking catalysts without going through pour point depressing and refining processes.

The invention discloses a catalyst coating material for purifying automobile exhaust gas. The catalyst coating material comprises an oxygen storage layer on the lower layer and a catalytic active layer on the upper layer; the oxygen storage layer is made of rare earth metal or transition metal One or more oxides are uniformly loaded on porous mineral particles; the catalytic active layer is formed by one or more transition metal oxides uniformly loaded on porous mineral particles. The invention further discloses a preparation method of the coating material and a catalyst prepared by using the coating material. The catalyst coating material disclosed by the invention is entirely composed of rare earth and transition metal oxides, does not contain noble metal elements at all, has low manufacturing cost, and has a large loading capacity of metal elements, many catalytic sites, and the upper and lower layers have a good synergistic catalytic effect , high catalytic conversion efficiency, good application prospects.

The invention relates to the field of organic chemistry and discloses a preparation method of ethyltriethoxysilane. The preparation method solves the problem that the existing ethyltriethoxysilane preparation method utilizes a high-toxicity benzene solvent as a reaction medium so that environmental pollution is large; a reaction equipment investment is high; and an industrial production cost is high. The preparation method comprises the following steps that triethoxysilane, a catalyst and a cocatalyst are added into a pressure-resistant reactor, then are heated to a temperature of 15 to 90 DEG C with stirring, and then are added with ethylene; the mixture undergoes a reaction until the pressure in the reactor is not reduced after ethylene feeding is stopped, so that a ethyltriethoxysilane synthesis product is obtained; and the ethyltriethoxysilane synthesis product is separated and purified to form ethyltriethoxysilane. The preparation method does not utilize an additional solvent, adopts simple equipment and processes, utilizes a small amount of a catalyst, reduces a cost, improves a synthesis yield and reaction selectivity, and realizes easy separation of a desired product ethyltriethoxysilane.