36results about How to "High isomerization activity" patented technology

Xylene isomerization processes, especially those processes in which ethylbenzene is also converted, are beneficially affected by adding benzene to the feed.

Catalysts comprise a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component and a sufficient amount of at least one platinum group metal hydrogenation component to enhance the isomerization activity of the catalyst.

A hydroisomerization catalyst according to the present invention is obtained by calcining a catalyst composite including an ion-exchanged molecular sieve or a calcined material thereof which is obtained by performing ion exchange of a molecular sieve containing an organic template in a solution containing a cation species and using water as a main solvent and at least one metal which is selected from a group consisting of metals belonging to Groups 8-10 of the Periodic Table of the Elements, molybdenum, and tungsten supported on the ion-exchanged molecular sieve or a calcined material thereof.

Xylene isomerization processes, especially those processes in which ethylbenzene is also converted, are beneficially affected by adding benzene to the feed.

The invention discloses an n-alkane low-temperature isomerization catalyst as well as a preparation method and an application of the n-alkane low-temperature isomerization catalyst. The catalyst disclosed by the invention comprises the following components in percentage by weight: 0.1%-1.0% of loaded metal Pt, 5.0%-10.0% of an element Cl, and the balance of a carrier gamma-Al2O3. The preparation method of the catalyst disclosed by the invention comprises the following steps: dipping chloroplatinic acid on the carrier gamma-Al2O3, and then drying and roasting to obtain Pt / gamma-Al2O3 catalyst containing 0.1%-1% of the Pt; and firstly reducing a platinum-containing catalyst, then uniformly dipping a chlorinating agent on the surface of the Pt / gamma-Al2O3 catalyst by adopting a chlorinating way of liquid-phase dipping, and then carrying out programmed warming for curing the chlorinating agent to obtain the Pt / gamma-Al2O3-Cl n-alkane isomerization catalyst with high chloride loading quantity (5%) and uniform distribution of the chlorine element. The catalyst provided by the invention has relatively high chlorine content, also has good chlorine distribution, and achieves high acidity loading quantity, high isomerization activity and high stability of the catalyst.

The invention discloses an isomerization catalyst containing modified mordenite and an application thereof. The catalyst is prepared from the following components in percentage by weight: 0.01-5% of noble metal element in the group VIII, 10-80% of phosphorus-modified mordenite, 0.1-10% of additives and the balance of binder containing 0.5-5.0% of halogen, wherein the weight of phosphorus in the modified mordenite accounts for 0.1-10%. The catalyst is used for the isomerization of C4-C12 alkane, has the characteristics of high catalytic activity and high isoolefine selectivity and can be used for producing the high-octane gasoline blending component.

A naphtha reforming catalyst, comprising a composite carrier and active components with the following content calculated on the basis of the carrier: 0.04-3.0% by mass of platinum, 0.04-5.0% by mass of Group VIIB metals, and 0.5-5.0% by mass of halogens. The composite support includes 0-80% by mass of γ-alumina and 20-100% by mass of mesoporous γ-alumina, and the preparation method of said mesoporous γ-alumina comprises template agent, fatty alcohol, inorganic acid Mix with aluminum source compound, fully react at pH 1-7, 1-100°C, dry the reaction product, and roast at 300-600°C for 2-12 hours to obtain amorphous mesoporous alumina, then use platinum-containing compound Solution impregnation, take the solid matter and dry it and bake it at 300-700°C. The template agent is polyethylene oxide-polypropylene oxide-polyethylene oxide tri-block copolymer, and the mole ratio of the template agent and the aluminum source compound The ratio is 1:1-200, and the molar ratio of the fatty alcohol to the aluminum source compound is 20-100:1. The catalyst has high isomerization and aromatization selectivity.

The invention discloses a method for isomerization of vitamin A, which comprises the following steps: 1) controlling the content of vitamin dimer in VA crude oil containing 11-cis vitamin A and 9-cis vitamin A to be 0.001-0.02 %; 2) The VA crude oil obtained in step 1) undergoes isomerization reaction under the action of a homogeneous metal catalyst to generate all-trans vitamin A. The invention can simultaneously and efficiently isomerize 11-cis vitamin A and 9-cis vitamin A in the VA crude oil into all-trans vitamin A, and the conversion rate of total cis vitamin A is high.

The hydroisomerization catalyst of the present invention is a catalyst used for hydroisomerization of a hydrocarbon, including a support including a calcined zeolite modified with at least one metal selected from the group consisting of Na, K, Cs, Mg, Ca, Ba, and K, and having a thermal history that includes heating at 350° C. or more, and at least one inorganic oxide selected from the group consisting of alumina, silica, titania, boria, zirconia, magnesia, ceria, zinc oxide, phosphorus oxide, and a composite oxide containing a combination of at least two or more of these oxides; and at least one metal supported on the support and selected from the group consisting of elements belonging to Groups 8 to 10 of the periodic table, molybdenum and tungsten.

The invention relates to a low-temperature isomerization method for low-carbon normal alkanes, wherein the low-temperature isomerization method includes the following steps: (1) carrying out heat exchange of a light hydrocarbon raw material containing normal C5 and normal C6 as principal components with an isomerization product, and after heat exchange, rectifying to obtain heterogeneous C5, normal C5 and a heavy hydrocarbon; (2) rectifying the heavy hydrocarbon again, to obtain heterogeneous C6 and a heavy hydrocarbon, mixing the normal C5 with the heavy hydrocarbon, and then supplementing chlorine; (3) carrying out drying dehydration on the material obtained after chlorine supplement, mixing with dried fresh hydrogen and circulating hydrogen, heating, and carrying out an isomerization reaction under the action of a catalyst after heating; and (4) after carrying out heat exchange of the isomerization product with a fresh raw material, carrying out first gas-liquid separation, wherein the obtained non-condensable gas is circulating hydrogen; and carrying out gas-liquid separation on the obtained liquid again, mixing the obtained liquid with a fresh raw material, and then rectifying. The yield of the liquid product obtained by the low-temperature isomerization method is more than 98%, the isomerization rate is 60%-90%, and the octane value can be increased by 10-30.