40results about How to "Reduced wear index" patented technology

This invention published a fluidization cracking catalyst. The main components of the catalyst are 5~70% (w/w) cracked active component, 5~80%clay and 10~60%agglomerant. Y-type of molecular sieve and 3~20% sialic material which based on catalyst and had been acidized within the cracked active component is the characteristic of the catalyst. The sialic material has a phase structure as thin diaspore. Its formula (calculated by weight of oxidants) is (0-0.3) Na2O . (40-90) Al2O3 . (10-60) SiO2. It has specific area 200~400m2/g, average aperture 8~20nm, most probable aperture 5~15nm.The acidification treatment mentioned was inorganic acid and sialic material (ratio of the tow: 0.1~0.3) kept contacting for 0.5~3h under room-temperature ~80DEG C.This catalyst has well intensity, high stability of activity, low yield of heavy oil and strong capability of conversion for crude oil.

The invention provides a micro-spherical SiO2-Al2O3 based noble metal catalyst and a preparation method thereof. The preparation method comprises the following steps: dispersing silica sol into a silica sol system, so that silica sol is mixed with alumina sol and a coagulant to form formed sol, forming the sol by virtue of an atomizing dispersion-oil column formation method, and carrying out aging, washing, drying and roasting to obtain micro-spherical SiO2-Al2O3; and loading noble metal active components with the micro-spherical SiO2-Al2O3 as a carrier, obtain the micro-spherical SiO2-Al2O3 based noble metal catalyst. The catalyst has the characteristics that the specific surface area and the pore volume are large, the dispersity of active components is high, the abrasion index is relatively low, and the wear resistance is high. The catalyst is mainly applied to a hydrogenation process of preparing hydrogen peroxide by using a fluidized bed anthraquinone method and has relatively high catalytic activity, selectivity and stability. The catalyst can be also applied to reaction processes such as hydrorefining, selective hydrogenation and selective oxidation in petrochemical engineering and fine chemical engineering production.

The invention relates to a recovery method of microspherical catalyst for a fluidized bed. The invention provides the method that catalyst to be recovered is mixed with each raw material preparing the fresh microspherical catalyst in certain proportion, the spray drying and the high temperature roasting are performed after the colloid milling of feed pulp, and the microspherical catalyst having the low abrasion index and the suitable particle size distribution can be obtained. The invention has the preparation processes that: firstly, according to the stoichiometric ratio of oxide dry basis, the catalyst to be recovered, molecular sieve initial powder, binding agent, auxiliary agent, pore forming agent, and deionized water are mixed and pulped, and the weight content of the oxide dry basis of recovered catalyst is not more than 80 percent in total blending; secondly, the colloid milling of the feed pulp through a colloid mill is performed, thereby the solid particle diameter contained in the feed pulp is smaller than 20 micron, 90 percent of the particle diameter is small than 10 micron, and 70 percent of the particle diameter is small than 5 micron; thirdly, the spray drying is performed, thereby producing a microspherical sample; fourthly, the microspherical sample is roasted in oxygen-containing atmosphere at 500 to 800 DEG C, thereby obtaining the microspherical catalyst for the fluidized bed. The recovered and prepared microspherical catalyst can be used for the reaction of producing alkene by converting an oxygen compound.

The invention provides a preparation method of a catalytic cracking catalyst. The method comprises the steps of: (1) mixing a porous material and a molecular sieve with a water solution of an organic film forming matter at a first temperature, and then drying; and (2) mixing clay and binders with the mixture prepared in the step (1) at a second temperature, pulping the mixture, and then carrying out spray drying, washing and drying in sequence, wherein washing is carried out at the first temperature; the organic film forming matter is a film forming matter with solubility in water at the first temperature higher than that at the second temperature; and the porous material is porous alumina and/a porous silicon-aluminum material. The invention also provides the catalytic cracking catalyst prepared by the method. The catalytic cracking catalyst not only has bigger mesopore volume but also maintains higher strength.

The invention relates to a zirconium sol, a preparation method and applications thereof, wherein the zirconium sol has a corrosion rate of not more than 1 g/m<2>.h, the pH value of 2.5-4, and the viscosity of more than 1000 mPa.s. The preparation method comprises: carrying out first contact on a zirconium-containing salt and an alkali solution, wherein a molar ratio of Zr to OH<-> is 1:1-2; carrying out second contact on the first contact mixture and an acid, wherein a molar ratio of Zr to H<+> is 1:1-3, and preferably the temperature of the first contact is 20-30 DEG C higher than the temperature of the second contact; and carrying out third contact on the second contact mixture and an acid, wherein a molar ratio of Zr to H<+> is 1:1-3. According to the present invention, the zirconium sol is used for preparing catalytic cracking catalysts, can improve the sphericity of the catalyst, and can improve the hydrocarbon oil cracking reaction effect of the catalyst.

The invention relates to a preparation method of a fluid molecular sieve catalyst, which mainly solves the problem that the fluid molecular sieve catalysts have lower abrasion resistance in the prior art, and adopts the technical proposal which comprises the following steps: (1) a liquid medium, a molecular sieve, a caking agent and a carrier material are evenly mixed to form a suspension, wherein, pH value of the suspension is controlled to be lower than the pH value above 5.0 of the isoelectric points of the caking agent; (2) the suspension is spray dried to obtain a preformed catalyst; (3) the preformed catalyst is roasted to obtain a finished catalyst product; consequently the preparation method of the fluid molecular sieve catalyst preferably solves the problem in the prior art and can be applied in the reaction procedure for producing low-carbon olefin with the raw materials of methanol or dimethyl ether.

This invention relates to a method for producing high-strength sand-like aluminum oxide with diasporite bauxite as the raw material. In this invention, a low-concentration refined solution and slurry prepared from aluminum hydroxide fine crystal seeds are efficiently agglomerated in the front part pool of the decomposition flow, and introduced into the back part of the decomposition flow together with a high-concentration refined solution and coarse crystal seeds. The concentrations of the two kinds of refined solution are 110-150 g/L and 170-220 g/l, respectively. The causticity ratios of the two kinds of refined solution are both 1.4-1.6. the volume ratio of the low-concentration and the high-concentration solution is (0.25) : 1. The method can guarantee the balance of the system grain sizes as well as improve the strength of the aluminum oxide product by controlling the concentration of the refined solution and the grain sizes of the fine crystal seeds.

The invention is a conversion catalyzer of half-synthetical hydrocarbon, containing denaturing nano alumina. It disperses synthetic molecular screen and denaturing nano alumina containing Ce, Zr and Mg to inorganic oxide clay and natural aluminium silicate clay, mixes into serum, and makes jet-drying shaping, washing and drying to get the conversion catalyzer. It is especially applied to process heavy raw materials with Ni and V.

The invention provides a modified rubber master batch and a preparation method thereof, an oil-extended solution-polymerized styrene-butadiene rubber composition, and a preparation method and a vulcanized rubber thereof. The modified rubber master batch comprises an uncrosslinked rubber and crosslinked-structure nitrile-butadiene rubber particles dispersed in the uncrosslinked rubber, wherein the average particle size of the nitrile-butadiene rubber particles is 50-200 nm; the gel content is 60 wt% or higher; the uncrosslinked rubber is styrene-butadiene rubber; and the weight ratio of the crosslinked nitrile-butadiene rubber particles to the uncrosslinked rubber is more than 20:80 and less than or equal to 80:20. The oil-extended solution-polymerized styrene-butadiene rubber composition comprises 100 parts by weight of modified rubber master batch and 1-70 parts by weight of oil-extended solution-polymerized styrene-butadiene rubber which are blended. The vulcanized rubber of the oil-extended solution-polymerized styrene-butadiene rubber composition has the advantages of higher slippery resistance, higher abrasion resistance and lower rolling resistance, and can be used for preparing a high-performance car tread rubber.

The invention discloses a method for improving the strength of a catalytic cracking propylene assistant and application of the method. Propylene assistant microspheres and a strength improver are mixed, filtered, roasted, washed and dried to obtain a modified propylene assistant; the content of the propylene assistantZSM-5 molecular sieve is 35-50 wt%, the main particle size after modification is 20-150 [mu] m, and the wear index is greatly reduced. The wear index of the propylene assistant improved by the method is reduced by about 50% compared with that before modification, so that a product with better wear resistance and higher intrinsic activity can be obtained on the premise that the content of the molecular sieve in the propylene assistant is high, and the product can be better applied to industrial production and exert catalytic activity.