76results about How to "Unobstructed channel" patented technology

The invention discloses a titanium silicalite TS-1 catalyst preparation method. Cheap inorganic Titanium silicalite is used as raw material, low quantity of tetrapropylammonium hydroxide or tetrapropylammonium bromide is adopted as template agent, and inorganic alkali such as ammonia water is used as alkali source so that the raw materials for preparation have low price and the production cost isgreatly reduced. The precursor preparation process is simple and easy to control, seed crystal is added to reduce the crystallization time and the repeatability is good. As secondary crystallization is adopted, the non-framework titanium is further reduced, and the acid site of the molecular sieve is reduced, the grain size is controllable within certain range, the molecular sieve channel becomessmoother to facilitate direct membrane separation of micrometer crystalline grains, and the obtained Titanium silicalite TS-1 catalyst has large grains, high activity, stable catalytic performance and broad industrial application prospect.

The invention discloses a dimethyl benzyl alcohol hydrogenolysis catalyst and a preparation method thereof. The catalyst comprises 35-70wt% of copper oxide, 5-25wt% of zinc oxide, 15-40wt% of silicondioxide, 0.5-15wt% of alkaline earth metal oxide and 0.1-5wt% of bismuth oxide and lead oxide. The preparation method comprises the following steps: (a) adding a mixed solution containing a Cu compound, a Zn compound, an alkaline earth metal compound, a Bi compound and a Pb compound and an alkaline precipitant solution into a silica sol aqueous solution for precipitation reaction and heating aging; (b) filtering, washing, drying and roasting the aged slurry to obtain complex compound powder; and (c) adding a binder, a forming assistant and the like into the complex compound powder, fully mixing, extruding and forming, drying and roasting to obtain the catalyst. When used for preparing cumene by hydrogenolysis of dimethylbenzyl alcohol, the method not only has good activity and selectivity,but also has good liquid resistance and high mechanical stability.

The invention relates to sulfydryl functionalized ordered mesoporous silicon-immobilize Au heterogeneous catalyst and a preparation method and application thereof. The preparation method is as follows: mixing surfactant, strong acid, water, ethyl orthosilicate and sulfhydryl silane under heating condition, continuously stirring the reactant mixture, filtering the reactant mixture to get white solid, and sequentially washing and drying the white solid to get a sulfydryl functionalized ordered mesoporous silicon carrier; mixing the carrier with ethanol and HAuCl4 solution, stirring for 24h under room temperature, pump filtering and washing the mixture, and vacuum drying overnight. In this way, the ordered mesoporous sulfydryl functionalized SBA-15-immobilize Au heterogeneous catalyst can be formed. The preparation process is simple and the heterogeneous catalyst prepared through the method has efficient and long-lasting catalytic activity, can improve the reaction speed, reduce the production cost and improve the quality of the product, and can be recycled for use, thereby reducing environment pollution.

The invention discloses a preparation method of a catalyst for improving the yield of gasoline produced by catalytic cracking. The preparation method comprises the following steps: with a mixture of kaolin and diatomite subjected to acid treatment as a raw material, adding chemical water, structural auxiliaries, a dispersing agent and/or a reinforcing agent into the mixture, and performing mixed pulping and spraying to obtain microspheres; roasting the sprayed microspheres, mixing the roasted microspheres with a guiding agent, sodium silicate and sodium hydroxide in a certain ratio, and performing a crystallization reaction under hydrothermal conditions, thereby obtaining a crystallization product with a pore structure and excellent abrasion resistance and with a 30%-60% NaY molecular sieve, wherein the crystallization product, namely the in-situ crystallized microspheres, can be taken as a precursor for preparing the catalytic cracking catalyst; and exchanging the in-situ crystallized microspheres with ammonium salt and rare earth to obtain the catalytic cracking catalyst for improving the yield of gasoline.

The invention relates to an inferior heavy oil hydrodesulfurization catalyst and a preparation method thereof. The catalyst takes aluminum oxide as the carrier, and adopts group VIII and group VIB elements especially Ni-Mo as the active components, the catalyst pore volume is 0.45-0.60cm<3>/g, the specific surface area is 205-260m<2>/g, the average pore diameter is 7.0-12.0nm, and the average pore diameter gradually increases from the center to the outer surface along the radial direction of the catalyst particles. According to the preparation method of the catalyst, a concentration continuously increasing acid solution is employed to treat molded and roasted carrier particles. The catalyst provided by the invention has large surface aperture, wide pore channel, excellent diffusion performance, high hydrodesulfurization activity and activity stability.

The invention discloses a preparation method of a catalyst for improving the yield of diesel oil produced by catalytic cracking. The preparation method comprises the following steps: with a mixture of kaolin and diatomite subjected to acid treatment as a raw material, adding chemical water, structural auxiliaries, a dispersing agent and/or a reinforcing agent into the mixture, and performing mixed pulping and spraying to obtain microspheres; roasting the sprayed microspheres, mixing the roasted microspheres with a guiding agent, sodium silicate and sodium hydroxide in a certain ratio, and performing a crystallization reaction under hydrothermal conditions, thereby obtaining a crystallization product with a pore structure and excellent abrasion resistance and with a 20%-30% NaY molecular sieve, wherein the crystallization product, namely the in-situ crystallized microspheres, can be taken as a precursor for preparing the catalytic cracking catalyst; and exchanging the in-situ crystallized microspheres with ammonium salt and rare earth to obtain the catalytic cracking catalyst for improving the yield of diesel oil.

The invention relates to a method for preparing an alpha-phenylethanol catalyst through hydrogenation of acetophenone and application. The catalyst contains copper oxide, zinc oxide, silicon dioxide and bismuth oxide. The method of the catalyst is realized by virtue of a sub-step precipitation method and comprises the following steps: precipitating zinc salt and a precipitator at a certain temperature, and aging, so as to obtain slurry (1); adding a mixed solution of copper salt and bismuth salt as well as the precipitator into the slurry (1), carrying out coprecipitation, and aging, so as toobtain slurry (2); adding carrier silicon into the slurry (2), and uniformly stirring and mixing, so as to obtain slurry (3); filtering, washing, drying and roasting the slurry (3), so as to obtain catalyst powder; adding a certain amount of pore forming agents into the catalyst powder, and carrying out piece formation; and carrying out secondary roasting on the formed catalyst, so as to obtain the final catalyst. The catalyst prepared by virtue of the method is large in pore volume and aperture, good in mass transfer property and heat transfer property and high in activity and selectivity.

The invention relates to an acetophenone hydrogenation catalyst and a preparation method thereof, which comprises the following steps: (1) hydrochloric acid, F127, KCl, 1,3,5-trimethylbenzene and polymethyl methacrylate microspheres are mixed evenly, then tetraethylorthosilicate is added to the mixture, and 4-12 hour later, a sol is obtained; (2) a mixed metal salt solution containing Cu, Mn, Bi and Pb is prepared, a solution of an alkaline precipitant is prepared, the two kinds of solutions are allowed to contact with the obtained sol for precipitation reaction, heating and aging to obtain aslurry; (3) the slurry is subjected to filtering, washing, drying and roasting to obtain composite compound powder; (4) the composite compound powder is mixed with a binder, an alkaline auxiliary agent and a forming auxiliary agent and extruded to obtain the catalyst. The catalyst active component copper prepared by the method has high dispersion, the acidity is weak and mass transfer performanceis good, side reactions such as hydrogenolysis and the like are effectively inhibited, and good activity and selectivity are obtained.

The invention relates to an inferior heavy oil hydrodemetallization catalyst and a preparation method thereof. The catalyst adopts aluminum oxide as the carrier, and takes group VIII and group VIB elements, especially Ni-Mo as the active components, the catalyst pore volume is 0.71-0.85mL/g, the specific surface area is 90-150m<2>/g, the average pore diameter is 19.0-30.0nm, and the average pore diameter gradually increases from the center to the outer surface along the radial direction of the catalyst particles. According to the preparation method of the catalyst, a concentration continuously increasing acid solution is employed to treat molded and roasted carrier particles. The catalyst provided by the invention has large surface aperture, wide pore channel, excellent diffusion performance, high hydrodemetallization activity and activity stability.

The invention provides a catalytic cracking catalyst. The catalytic cracking catalyst contains clay, alumina containing an additive and a modified Y type molecular sieve. The modified Y type molecularsieve comprises 5 to 12 wt% of rare earth and no more than 0.5 wt% of sodium oxide, and has a total pore volume of 0.36 to 0.48 mL/g; the pore volume of secondary pores accounts for 20 to 38% of thetotal pore volume; a lattice constant is 2.440 nm to 2.455 nm; the content of non-framework aluminum is no more than 10% of total aluminum content; lattice collapse temperature is higher than 1060 DEGC; and a ratio of the amount of acid B to the amount of acid L is no less than 3.50. A preparation method for the catalytic cracking catalyst comprises the following steps: preparing a rare earth-containing Y type molecular sieve with a conventional cell size; carrying out roasting in a water vapor atmosphere with a temperature of 350 to 520 DEG C and a volume percentage of 30 to 95% for 4.5 to 7h; carrying out a contact reaction with silicon tetrachloride; and carrying out acid treatment. The catalytic cracking catalyst has higher heavy oil conversion activity, low coke selectivity, and higher gasoline yield, liquefied gas yield, light oil yield and total liquid yield.

The invention relates to a chitin-based biomass charcoal double-sided electrode slice for electroadsorption and a preparation method thereof. The preparation method comprises the steps: cleaning chitin powder, drying and sieving, and carrying out heat preservation for 1-2 h in a nitrogen atmosphere at the temperature of 400-500 DEG C, to obtain pre-carbonized powder; mixing the pre-carbonized powder and potassium hydroxide powder, then placing the mixture in a vacuum tube furnace, and carrying out heat preservation for 2-3 h at the temperature of 800 DEG C-900 DEG C to obtain biomass charcoalpowder I; adding the biomass charcoal powder I into a 10 wt% HCl solution, stirring and cleaning, to obtain biomass charcoal powder II; mixing an electrically conductive agent, the biomass charcoal powder II and polyvinylidene fluoride, dissolving the mixture in dimethylacetamide, and mixing; and uniformly coating both sides of a current collector titanium slice with the obtained mixed slurry, drying, and freeze-drying to prepare the chitin-based biomass charcoal double-sided electrode slice for electroadsorption. The production cost is low, and the prepared product has small internal resistance of the electrodes, high capacitance and good adsorption performance, and is suitable for treating different water qualities.

The invention discloses a method for treating nickel-containing wastewater by using a composite adsorbent. The method comprises the following steps: mixing the nickel-containing wastewater with the composite adsorbent, carrying out oscillating at room temperature, carrying out solid-liquid separation to obtain preliminarily-treated wastewater, adjusting the pH value of the preliminarily-treated wastewater to 4-5, adding sodium hypochlorite, carrying out a stirring reaction, adding the composite adsorbent, conducting oscillating at room temperature, and carrying out solid-liquid separation to obtain secondarily-treated wastewater; adjusting the pH value of the secondarily-treated wastewater to 10.5-11.5, performing standing for precipitation, taking supernatant liquid, adding polyaluminum chloride, conducting stirring, adding polyacrylamide, performing stirring and standing, and carrying out solid-liquid separation to obtain tertiarily-treated wastewater; and mixing the tertiarily-treated wastewater with the composite adsorbent, conducting oscillating at room temperature, and carrying out solid-liquid separation, wherein the composite adsorbent is prepared by uniformly mixing modified sepiolite, acid-modified fly ash and cross-linked chitosan. The method for treating the nickel-containing wastewater by using the composite adsorbent provided by the invention is simple in process,has a better treatment effect on various forms of nickel in a water body, and is high in nickel removal rate.

The invention belongs to an organic base heterogeneous catalyst, in particular to a preparation method of an amido bridged regular mesoporous organic base heterogeneous catalyst. A homogeneous organic base catalyst in the prior art is separated and recycled difficultly from a reaction system, so that the production cost is increased, and environmental pollution is brought. The method comprises the following steps of: mixing P123, KCl, NaF or NaCl and HCl with water to prepare a surfactant; adding 1,2-bis(triethoxy silicon)ethane and amido bridged silicane; aging at the temperature of 90-110 DEG C for 26-36 hours and getting a deposit; grinding the deposit; adding a mixed solution of hydrochloric acid and ethanol and extracting at the temperature of 70-80 DEG C for 24-48 hours; washing a product with base; carrying out extraction filtration and vacuum dying at the temperature of 80 DEG C to obtain the amido bridged regular mesoporous organic base heterogeneous catalyst. The invention has the advantages of high catalytic activity, simple preparation process, catalyst recycle, cost saving and environmental pollution reduction.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The carrier consists of a small crystal particle Y-shaped molecular sieve and alumina, wherein the small crystal particle Y-shaped molecular sieve has high crystallinity, high ratio of silicate to aluminium, continuous and stable framework structure and smooth pores. A hydrocracking catalyst prepared from the carrier has the characteristics of high catalytic activity, high heavy naphtha selectivity, high potential aromatic hydrocarbon content, low bureau of mines correlation index (BMCI) value of hydrocracking tail oil and the like.

The invention belongs to the technical field of food, and particularly relates to a physical aspergillus favus removing rice dumpling powder production technology. According to the physical aspergillus favus removing rice dumpling powder production technology disclosed by the invention, a galvanized pipe which is 55 to 60 mm in diameter and 2 to 3 mm in pipe wall thickness is used for sucking washed sticky rice, and the sticky rice in the galvanized pipe is in mutual friction, so that aspergillus favus on the surface of the sticky rice can fall off through friction, and the quality of the sticky rice is increased; the washed sticky rice is sucked to a third-stage filter sieve for filtering, so that impurities and small particles in the sticky rice can be respectively removed, and the whole processing technology is capable of solving the problem that the haspergillus favus on the surface of the sticky rice is not easy to remove.

The invention provides a composite flocculant for municipal sewage treatment and a use method thereof. The composite flocculant is prepared from the following raw materials in parts by weight: 10-15 parts of kaolin powder, 15-25 parts of hydroxyethyl cellulose, 3-7 parts of sodium hypochlorite, 10-15 parts of lignosulfonate, 0.5-1.5 parts of a catalyst, 10-20 parts of acrylamide, 7-13 parts of polyaluminum chloride, 0.5-1.5 parts of a stabilizer, 30-35 parts of diluted hydrochloric acid and 150-180 parts of deionized water. The composite flocculant for municipal sewage treatment has a good adsorption effect on heavy metal ions in industrial wastewater, is good in biodegradability and does not easily cause secondary pollution.