51results about How to "Strong anti-coking ability" patented technology

A catalyst for lightening the heavy arylhydrocarbon contains the metal in VIII family and composite carrier including ZSM-5 zeolite, mordenite and alumina. It can increase the transform rate of C9 aryhydrocarbon and output rate of xylene, and decrease the carbon deposit.

The present invention discloses an aluminium oxide carrier which contains magnesium and phosphorus, also can contain potassium and its preparation method. The magnesium, phosphorus and potassium can be added in the process of preparation. Said carrier is low in acidity and has large pore volume and large specific surface area. The catalyst prepared by using said carrier has the features of strong anti-coking property and good stability.

Preparation of micro-size particle zeolite catalyst for aromatization and its application in complete fractional FCC gasoline hydrogenation-aromatization composite process are disclosed. The catalyst consists of: transition metal oxide and lanthanide metal oxide is 1.0wt% - 10.0wt%, micro-size particle zeolite of 20nm-800nm 50.0wt% - 90.0wt%, and balanced inorganic oxide binder. Its advantages include low total and L acidity, unblocked pore canal, good stability and strong anticoking ability, low antiknock index ((R+M)/2) loss of gasoline product with reduced S and olefin contents of FCC gasoline.

The invention relates to a catalyst and a method for preparing m-xylylenediamine by hydrogen isophthalonitrile and mainly solves the problem that in the prior art, a catalyst easily cokes and loses activity. The catalyst is composed of the follow components in parts by weight: (a) 5.0-40.0 parts of metallic nickel or nickel oxide, (b) 0.01-25.0 parts of at least one element or oxide of the element selected from the IIA column in the Periodic Table, (c) 0.01-10.0 parts of at least one of Mo, Zr, and Ti or oxide of Mo, Zr and Ti, (d) 0.01-10.0 parts of at least one of Sn, Fe, and Cu or oxide of Sn, Fe and Cu, (e) 0.01-10.0 parts of at least one element or oxide of the element selected from rare earth and (f) 9-95 parts of silicon dioxide carrier. By adopting the technical scheme, the problem is well solved and the catalyst can be used in the technical scheme for fixed bed continuous hydrogenation production of m-xylylenediamine.

The invention discloses a natural gas catalytic pyrolysis hydrogen production catalyst and a preparation method thereof. The natural gas catalytic pyrolysis hydrogen production catalyst takes MOyCNFs as a carrier to load an active component Ni; wherein, the weight portions of each component are as follows: 10 to 50 portions of Ni element, 5 to 70 portions of MOy and 2 to 45 portions of CNFs; the preparation method is as follows: the MOy and pretreated CNFs are added into water solution of nickel salt, then a soda lye is added to adjust the pH value between 6 and 8; then the mixture is stirred and stood; the obtained deposit is filtered, washed and dried, thus obtaining the catalyst. The catalyst has the advantages of high methane conversion rate, high carbon deposit resistance and good stability. The invention belongs to the field of natural gas hydrogen production.

A process for preparing high quality diesel oil from poor-qualiry fraction oil includes such steps as hydrorefining, hydro-pour-depressing and arylhydrocarbon saturation. Its advantages are high hexadecame value, low pour point, and low contents of S and arylhydrocarbon.

The invention discloses a USY molecular sieve with double meso-structures. The volume of pores with pore sizes of 3 to 5 nm in the USY molecular sieve accounts for 15 to 40% of the total pore volume of the USY molecular sieve; the volume of pores with pore sizes of 7 to 10 nm accounts for 25 to 50% of the total pore volume of the USY molecular sieve; a mol ratio of silicon oxide to alumina in the molecular sieve is in a range of 7 to 15; and the USY molecular sieve has a specific surface area of 680 to 980 m<2>/g, a pore volume of 0.42 to 0.75 ml/g and an average pore size of 1.9 to 3.1 nm. The USY molecular sieve prepared in the invention has meso pores of two pore sizes, can provide more reaction space for large molecules and has improved catalysis performance.

The invention discloses a modified Y type molecular sieve and a preparation method thereof. The molecular sieve has the following properties: the total pore volume is 0.76-1.25ml/g, wherein the mesoporous volume is 0.55-1.05ml/g and the mesoporous volume is 65-90% of the total pore volume; the mole ratio of silicon oxide to aluminum oxide is 10-35; and the specific surface area is 680-1050m<2>/g. The preparation method comprises the following steps: under a stirring condition, adding the Y type molecular sieve into a pressure container filled with organic aqueous alkali; closing the system; increasing the pressure to 0.2-1.0MPa, and then increasing temperature to 50-90 DEG C and treating for 0.5-3 hours under constant temperature; and relieving pressure, performing suction filtration, drying and roasting, thereby acquiring the modified Y type molecular sieve. The molecular sieve has larger-size mesoporous distribution and can supply much more reaction space for macromolecules; the catalytic performance of the molecular sieve is promoted; and the preparation method is simple and is suitable for industrial application.

The invention relates to an acrylic acid catalyst regeneration method. An acrylic acid catalyst has a concentrated pore distribution and a moderate total pore volume, the amount of medium-sized pores of about 5-10nm accounts for above 70% of the amount of total pores, and the medium-sized pores of about 5-10nm form short and thick tunnel structures, so the catalyst has the characteristics of strong carbon deposit resistance, difficult agglomeration and long service life. The two-step calcining regeneration method for regenerating an inactivated acrylic acid catalyst comprises the following steps: heating the inactivated acrylic acid catalyst to 280-320DEG C at a speed of 1-2DEG C/h, and carrying out constant temperature calcining for 1-10h; and heating to 330-370DEG C at a speed of 1-2DEG C/h, calcining in an oxidizing gas for 1-3d, heating to 380-410DEG C, and calcining in nitrogen atmosphere for 1-3d to obtain a regenerated acrylic acid catalyst having an equivalent activity with the fresh catalyst.

The present invention relates to one kind of alkyl arene preparing dehydrogenating catalyst and aims at avoiding potassium loss of catalyst during reaction, raising the carbon deposit resistance of catalyst and increasing catalyst life. The technological scheme of the present invention includes replacing partial soluble potassium compound in the Fe-K-Ce-Mo catalyst system with potash feldspar, and adding carbon separation resisting assistant to inhibit carbon separation reaction to the Fe-K-Ce-Mo catalyst system. The dehydrogenating catalyst system may be used in industrial alkyl arene preparing production.

The invention discloses an oil product hydrodeoxygenation upgrading catalyst and a preparation method and application thereof. The oil product hydrodeoxygenation upgrading catalyst comprises a catalyst carrier, and an active component and an auxiliary agent which are loaded on the catalyst carrier, wherein the active component comprises ruthenium oxide, molybdenum oxide, nickel oxide and/or cobaltoxide; the catalyst carrier comprises gamma aluminum oxide, zeolite and activated carbon; the auxiliary agent comprises phosphorus oxide; in the active component, the molar ratio of ruthenium oxide to molybdenum oxide to nickel oxide and/or cobalt oxide is (0.2-1): (10-28): (2-10). The oil product hydrodeoxygenation upgrading catalyst has the characteristics of high activity and conversion rate of low-temperature hydrodeoxygenation, good selectivity, repeated long-term recycling, good stability, strong coking resistance, good hydrothermal stability and good acid and water resistance, and thepreparation method is simple and wide in application prospect.

The invention discloses a USY molecular sieve. The USY molecular sieve has a hollow structure. The USY molecular sieve has a silicon oxide-alumina mole ratio of 4.5-25, the grain size of 0.5-1.2 microns, a specific surface area of 420-800m<2>/g, a pore volume of 0.33-0.82ml/g and an average aperture size of 1.5-4.0nm. The USY molecular sieve has more exposed reaction active sites, greatly shortens a diffusion distance of reactants and improves molecular sieve catalysis performances.

The invention discloses a preparation method of a hollow USY molecular sieve. The preparation method comprises 1, preparing a guiding agent, 2, preparing a mixed solution from an aluminum source, water and sodium hydroxide, adding a low silica-alumina ratio NaY molecular sieve and the guiding agent obtained through the step 1 into the mixed solution, carrying out uniform stirring, carrying out constant temperature crystallization on the gel at a temperature of 90-120 DEG C for 12-72h and carrying out cooling, washing, pumping filtration and drying to obtain a Y-Y composite molecular sieve, 3, carrying out ammonium exchange on the Y-Y composite molecular sieve prepared through the step 2, 4, treating the Y-Y composite molecular sieve subjected to ammonium exchange under hydro-thermal conditions and 5, washing the composite molecular sieve subjected to hydro-thermal treatment in the step 4 to obtain the hollow USY molecular sieve. The USY molecular sieve has more exposed reaction active sites, greatly shortens a reactant diffusion distance and improves molecular sieve catalysis performances.

The invention provides a molecular sieve catalyst for medium and low temperature denitration. The molecular sieve catalyst is a loaded manganese base medium and low temperature Mn/USY catalyst and comprises a USY molecular sieve carrier and an active component manganese, wherein the loading capacity of the active component manganese is 5 to 15 percent; the USY molecular sieve carrier has a hollowstructure; in addition, a certain amount of amorphous silica is reserved at a hollow part of the hollow structure, so that the molecular sieve catalyst has good catalytic activity and diffusion capability and high coke formation resistance; besides, the invention further provides a production method of the molecular sieve catalyst for the medium and low temperature denitration; the Mn/USY catalystis obtained by impregnating a manganese acetate solution and a USY molecular sieve, drying, calcining and sieving. The production method of the molecular sieve catalyst is simple and convenient; Mn/USY catalysts with different manganese loading capacities can be produced by adjusting different manganese loading capacities of active components; by measurement of a continuous flow fixed reactor, the Mn/USY catalyst with 10 percent of manganese loading capacity has highest catalytic efficiency.