37results about How to "High isomerization selectivity" patented technology

A hydroisomerization catalyst of the present invention is obtained by calcining a catalyst composition containing an ion-exchanged molecular sieve or a calcined product thereof, and at least one metal selected from the group consisting of metals of Groups 8 to 10 in Periodic Table of the elements, molybdenum and tungsten, carried on the ion-exchanged molecular sieve or the calcined product thereof, wherein the ion-exchanged molecular sieve is obtained by ion-exchanging a molecular sieve, which includes nanocrystals having a pore structure of ten-membered rings or eight-membered rings and having a ratio of the pore volume to the external surface area ([pore volume]/[external surface area]) of 2.0×10⁻⁴ mL/m² to 8.0×10⁻⁴ mL/m² and contains an organic template, in a solution containing a cationic species.

The invention provides a method for preparing a large-aperture SAPO-11 molecular sieve, which comprises the following steps: adding an alcoholic solvent corresponding to an organic silicon source in a colloid admixture for crystallization and particularly adopting an admixture of dinpropylamine and long chain organic amine as a composite template agent simultaneously, thereby obtaining the large-aperture SAPO-11 molecular sieve through restraining the hydrolyzation of the organic silicon source and adjusting the molecule dimension of the template agent; and the large-aperture SAPO-11 molecular sieve can be used for the isomerization of a double-branch chain of hydrocarbons by a load active component. The invention further provides a preparation method for a catalyst adopting the obtained large-aperture SAPO-11 molecular sieve as a carrier; platinum family noble metals are loaded by using the SAPO-11 molecular sieve; and the prepared catalyst is used in the method for catalyzing the hydroisomerization reaction of matters of hydrocarbons; and meanwhile, the yield of isomers and the selectivity of the double-branch chain in a reaction product are improved.

The invention discloses normal alkane isomerization catalyst and a preparation method thereof. The catalyst comprises a TON molecular sieve, inorganic melt-resistant oxide and hydrogenation component, wherein, the TON molecular sieve contains IB elements, the weight content of the IB elements in the molecular sieve is 0.5 to 10 percent counted by the metal. The preparation process of the catalyst comprises the following steps: firstly, the IB elements are loaded onto the molecular sieve, and then are prepared into the catalyst. The catalyst is used for the isomerization process of the normal alkane, and has the characteristic of high reaction selectivity.

The invention discloses a method for manufacturing an isoparaffin solvent oil. By utilizing distillate or light deasphalted oil and the like as a raw material, the isoparaffin solvent oil is manufactured by the integrated process of hydroprocessing-hydrogenation isomerization-hydrofinishing. With the method of the invention, high-quality isoparaffin solvent oil products of various fractions can be manufactured with ordinary raw oil. The method has the characteristics of good raw material adaptability, good quality of products, flexible manufacturing and the like.

The invention discloses a paraffin hydrocarbon shape selective isomerization catalyst, a preparation method and application thereof. The catalyst comprises a rare earth-modified molecular sieve and a halogen-modified inorganic melting-resisting oxide and at least one VIII-family precious metal, wherein the molecular sieve is a TON type molecular sieve, the weight ratio of the rare earth-modified molecular sieve to the halogen-modified inorganic melting-resisting oxide is 10:90-90:10, in the catalyst, the content of the VIII-family precious metal is 0.1-10 percent by weight, in the rare earth-modified molecular sieve, the mass content of the rare earth oxide is 0.5-60.0 percent, and in the halogen-modified inorganic melting-resisting oxide, the mass content of the halogen is 0.1-20.0 percent. Compared with the prior art, the catalyst is especially suitable for a hydroprocessing process of lubricating oil distillate, and has the characteristics of high yield of a target product, low flow point and high viscosity index.

A catalyst for hydroisomerizing long-chain n-paraffin contains noble metal (0.1-1 wt.%), the gel of silicon oxide and aluminium oxide (20-79) and silicon aluminium phosphate as molecular sieve (20-79). Its advantages are high transform activity and high isomerizing selectivity.

The invention discloses an n-alkene isomerization catalyst which comprises a carrier and a modified compound, wherein the modified compound is polyalcohol, the mass ratio of the modified compound to the carrier is (0.01-0.4):1, and the carrier comprises a molecular sieve and a binder. According to the catalyst, the catalytic active component is modified by the modified compound, and the isomerization selectivity of the catalyst can be remarkably improved.

The invention discloses a MCM-22/ZSM-22 composite molecular sieve catalyst and its preparation method and application. The catalyst comprises by weight, 10-90% of a modified MCM-22/ZSM-22 composite molecular sieve, and a group VIII noble metal active component. The modified MCM-22/ZSM-22 composite molecular sieve comprises, weight, 0.1-10% of silicon dioxide. MCM-22 molecular sieves in the MCM-22/ZSM-22 composite molecular sieve coat ZSM-22 molecular sieves and the MCM-22/ZSM-22 composite molecular sieve comprises, by weight, 1.0-50% of MCM-22. The catalyst can reduce the condensation point of the waxy raw material oil, improves a yield of the liquid product and has a high viscosity index of the lubricating base oil in lubricating oil fraction isodewaxing.

The invention discloses an isomerization catalyst, and a preparation method and an application thereof. The catalyst includes, by weight, 10-90% of an MCM-22/ZSM-23 compound molecular sieve, 0.1-5.0% of gallium oxide and 0.1-1.5% a group VIII precious metal, wherein the MCM-22/ZSM-23 compound molecular sieve is obtained through wrapping ZSM-23 molecular sieve with MCM-22 molecular sieve, and the weight content of the MCM-22 in the MCM-22/ZSM-23 compound molecular sieve is 1.0-50%. The catalyst reduces the condensation point of wax-containing raw oil, improves the yield of liquid products, and has the high viscosity index characteristic of lubricating oil base oil when especially used in the isodewaxing process of a lubricating oil fraction.

The invention provides an alkyl aromatic isomerization catalyst which comprises a composite carrier and 0.005-0.2% by mass of precious metal calculated on the basis of the composite carrier, the composite carrier comprises 45-75% by mass of high-silicon five-membered ring zeolite and 25-55% by mass of macroporous alumina, the total pore volume of the catalyst is 0.4-1.5 mL/g, and the total specific surface area of the catalyst is 350-500 m < 2 >/g. The catalyst is used for an aromatic isomerization reaction, can improve the reaction activity of xylene isomerization and removal of aromatic sidechain alkyl, and improves the selectivity of an isomerization catalytic reaction process.

The invention provides an alkyl aromatic isomerization catalyst which comprises a composite carrier and group VIII metal with the content of 0.005-0.2% by mass based on the composite carrier, the composite carrier comprises 48-75% by mass of high-silicon five-membered ring zeolite, 0.5-3.0% by mass of molybdenum oxide and 24-50% by mass of macroporous alumina, the total pore volume of the catalystis 0.4-1.5 mL/g, and the total specific surface area of the catalyst is 350-500 m < 2 >/g. The catalyst is used for an aromatic isomerization reaction, can improve the reaction activity of xylene isomerization and removal of aromatic side chain alkyl, and improves the selectivity of the isomerization reaction.