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

The invention provides a normal-paraffin isomerization catalyst, a preparation method and application of the normal-paraffin isomerization catalyst, and relates to the technical field of the paraffin-isomerization catalyst, and is used for solving the problems of low activity, poor stability and low conversion rate in the existing isomerization catalyst. The normal-paraffin isomerization catalyst comprises the following components in percentage by mass: 0.1-1.0% of metal component Pt and 2.0-5.0% of halogen Cl and the balance of carrier gamma-Al2O3. The normal-paraffin isomerization catalyst provided by the invention is prepared by dipping, reduction, inorganic chlorination and organic chlorination; the metal elementary substance Pt is loaded on the multi-porous carrier gamma-Al2O3, and after chlorination treatment, the Pt-Al2O3-Cl normal-paraffin low-temperature isomerization catalyst is formed; and the normal-paraffin isomerization catalyst has the advantages of high liquid absorption, high isomerization rate, high reaction activity and good stability.

The invention discloses an alkane hydroisomerization catalyst which comprises MCM-22 / ZSM-22 composite molecular sieves and group VIII noble metal active constituents. According to the catalyst content in percentage by weight,, the content of the MCM-22 / ZSM-22 composite molecular sieves is 10-90%, and the content of the group VIII noble metals is 0.1-1.5%, wherein MCM-22 molecular sieves in the MCM-22 / ZSM-22 composite molecular sieves wrap around ZSM-22 molecular sieves, and the content of the MCM-22 molecular sieves in the MCM-22 / ZSM-22 composite molecular sieves is 1-50%. The catalyst provided by the invention not only can reduce the condensation point of the waxy raw oil but also can improve the yield of liquid products, is particularly used for a lubricating oil distillate isomerization dewaxing process, and has the characteristic that the lubricant base oil is high in viscosity index.

The invention relates to C7C20 paraffin isomerization catalyst, which comprises a composite carrier, VIII metals and sulfate. The composite carrier comprises 10 to 70 mass percent of L zeolite, 10 to 60 mass percent of zirconia and 10 to 50 mass percent of binder. The catalyst includes 0.01 to 5.0 mass percent of the VIII metals and 0.1 to 5 mass percent of the sulfate. The catalyst is used for the isomerization reaction of the paraffin with larger carbon number, and has high activity, low pyrolysis product and high isomerization selectivity.

This method for producing a hydroisomerization catalyst is characterized by comprising: a first step, wherein a catalyst to be processed is prepared, said catalyst having a carrier, which contains a zeolite having a 10-membered ring one-dimensional porous structure, and at least one type of metal, which is carried by the carrier, selected from a group comprising a metal belonging to groups 8-10 in the periodic table, molybdenum and tungsten; and a second step, wherein the hydroisomerization catalyst, which has 0.4 to 2.5 mass% of carbon contained in a catalyst, is obtained by conducting a coking process on the catalyst to be processed using a carbon-containing compound.

The present invention provides a process for preparing a zeolite by hydrothermal heating of silica precursor and alumina precursor along with a combination of two structure-directing organic templates, N,N-dimethyl formamide and 1,6-diaminohexane in the presence of an alkali. The use of two structure-directing organic templates, not only reduces the crystallization time but also enables the preparation of more catalytically active ZSM-22 of submicron crystallite size. The present invention also provides a process of preparing a noble metal containing zeolite catalyst for hydroisomerization of long chain n-paraffins.

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 relates to an n-hexadecane hydroisomerization reaction method on a loaded crystalline state nickel phosphide catalyst, belongs to the field of heavy alkane isomerization, and particularly relates to the n-hexadecane hydroisomerization reaction method on the loaded crystalline state nickel phosphide catalyst. The invention aims at solving the problems of a precious-metal-containing catalyst used for long-carbon-chain heavy alkane isomerization in the prior art of high cost and poor sulfide poisonousness resistant performance and the problem of a precious-metal-free isomerization catalyst of low selectivity. According to the method, Ni(NO3)2 6H2O and (NH4)2HPO4 are dissolved into water; SAPO-31 molecular sieves are added; drying is performed at the temperature being 100 DEG C; then, the materials are put into a muffle furnace to be roasted; then, temperature-programmed reduction is performed in hydrogen gas atmosphere to obtain the catalyst; the catalyst is filled into a reactor; the n-hexadecane hydroisomerization reaction is performed.

A method for producing a hydroisomerization catalyst according to the present invention includes: a first step of preparing a catalyst to be treated, which contains a support having a one-dimensional porous structure including a 10-membered ring and at least one metal selected from the group consisting of: group 8 to 10 metals of the periodic table, Mo, and W supported on the hydroisomerization catalyst; and a second step of producing a hydroisomerization catalyst having a carbon content of 0.4 to 2.5% by mass by subjecting the catalyst to be treated to a coking treatment by means of a carbon-containing compound.

A method for producing a hydroisomerization catalyst according to the present invention includes: a first step of preparing a catalyst to be treated, which contains a support having a one-dimensional porous structure including a 10-membered ring and at least one metal selected from the group consisting of: group 8 to 10 metals of the periodic table, Mo, and W supported on the hydroisomerization catalyst; and a second step of producing a hydroisomerization catalyst having a carbon content of 0.4 to 2.5% by mass by subjecting the catalyst to be treated to a coking treatment by means of a carbon-containing compound.

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 catalystcomprises 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 provides a normal-paraffin isomerization catalyst, a preparation method and application of the normal-paraffin isomerization catalyst, and relates to the technical field of the paraffin-isomerization catalyst, and is used for solving the problems of low activity, poor stability and low conversion rate in the existing isomerization catalyst. The normal-paraffin isomerization catalyst comprises the following components in percentage by mass: 0.1-1.0% of metal component Pt and 2.0-5.0% of halogen Cl and the balance of carrier gamma-Al2O3. The normal-paraffin isomerization catalyst provided by the invention is prepared by dipping, reduction, inorganic chlorination and organic chlorination; the metal elementary substance Pt is loaded on the multi-porous carrier gamma-Al2O3, and after chlorination treatment, the Pt-Al2O3-Cl normal-paraffin low-temperature isomerization catalyst is formed; and the normal-paraffin isomerization catalyst has the advantages of high liquid absorption, high isomerization rate, high reaction activity and good stability.

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 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.

The present invention provides a process for preparing a zeolite by hydrothermal heating of silica precursor and alumina precursor along with a combination of two structure-directing organic templates, N,N-dimethyl formamide and 1,6-diaminohexane in the presence of an alkali. The use of two structure-directing organic templates, not only reduces the crystallization time but also enables the preparation of more catalytically active ZSM-22 of submicron crystallite size. The present invention also provides a process of preparing a noble metal containing zeolite catalyst for hydroisomerization of long chain n-paraffins.

The invention discloses an n-alkene isomerization catalyst which comprises a carrier and a modified compound, wherein the modified compound is monosaccharide or disaccharide, the mass ratio of the modified compound to the carrier is (0.01-0.3):1, and the carrier comprises a molecular sieve and a binder. According to the catalyst, catalytic active components are modified by the modified compound, and the isomerization selectivity of the catalyst can be remarkably improved.

The invention discloses an n-alkene isomerization catalyst which comprises a carrier and a modified compound, wherein the mass ratio of the modified compound to the carrier is (0.01-0.4):1, the carrier comprises a mixed molecular sieve and a binder, the modified compound is selected from phenol, monosaccharide or disaccharide and polyalcohol or organic acid ammonia, and the mixed molecular sieve comprises a mesoporous molecular sieve and a macroporous molecular sieve. According to the catalyst, catalytic active components are modified by the modified compound, and the isomerization selectivity of the catalyst can be remarkably improved.

The invention relates to a high-selectivity non-precious-metal long-chain alkane isomerization catalyst and a preparation method of the high-selectivity non-precious-metal long-chain alkane isomerization catalyst. The catalyst contains SAPO-11 / 31 / 41 or modified ZSM-22 / 23 molecular sieve, a VIBth or VIIIth hydrogenated active metal component, inorganic refractor oxide and the like. The preparation method of the catalyst comprises the following steps of preparing porous CoMoNiW oxide, and synthesizing SAPO-11 / 31 / 41 or modifying ZSM-22 / 23; mixing the molecular sieve and inorganic refractory oxide, adding a peptizing agent, water and an extrusion assistant, and extruding the mixture into cream; mixing the CoMoNiW oxide and the cream, and extruding the mixture into strips; and finally drying and baking the strips to obtain the catalyst. The method can be used for preparing the catalyst with different hydrogenated active component contents and especially with high hydrogenated component content. The prepared catalyst adopts the non-precious metal as a hydrogenated component, the specific surface area and pore volume are large, the catalyst pore canals are smooth, and the catalyst is applicable to the more than C7 long-chain alkane isomerization reaction, good in activity and high in isomerization selectivity.

The invention discloses a bimetal reforming catalyst and a preparation method thereof. The catalyst comprises a spherical alumina carrier and the following active ingredients loaded on the alumina carrier based on dry-basis alumina in percentage by weight: 0.01 to 5.0 percent of group VIII metal, 0.01 to 5.0 percent of group IVA metal and 0.01 to 10.0 percent of halogen; and in catalyst pellets, the mean concentration ratio of the group VIII metal in a spherical center region to the group VIII metal in a spherical shell region is 1.6-2.9. The method for preparing the catalyst comprises the following steps of: impregnating the group IVA metal-containing alumina by using impregnation liquid which contains a group VIII metal compound and polybasic organic acid; and drying and roasting the solid obtained by impregnation. The catalyst is used for hydrocarbon reforming reaction and has higher selectivity and good carbon deposit resistance.

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.