Isomerization catalyst containing modified mordenite and application thereof

A mordenite and catalyst technology, which is applied to the light hydrocarbon isomerization catalyst and the application field of C4-C12 alkane isomerization reaction, can solve the problems of low equilibrium concentration of isomerized products, influence on octane number, influence and the like

Active Publication Date: 2015-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] USP4,232,181, GB1039246, GB1189850, USP4,665,272 and other patent documents have described the preparation method of this type of catalyst in detail, but because the application temperature of the zeolite-type dual-function catalyst is relatively high, and the equilibrium concentration of the isomer product at high temperature is low, Especially for n-hexane, a higher reaction temperature will affect the concentration of 2,2-dimethylbutane (2,2-DMB) in the isomerized product, and 2,2-DMB has a high octane number, If its concentration is reduced, it will directly affect the octane number of isomerized products

Method used

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Examples

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preparation example Construction

[0012] Provide a kind of specific preparation method of catalyst of the present invention below, but not limited to this method, concrete steps are:

[0013] (1) Preparation of phosphorus-modified mordenite: impregnating an aqueous solution of a phosphorus-containing compound into hydrogen-type mordenite, followed by conventional drying and roasting to obtain phosphorus-modified mordenite;

[0014] (2) fully mixing aluminum hydroxide, halogen compound, peptizing agent and deionized water to form a viscous substance, as a binder for preparing the catalyst of the present invention;

[0015] (3) Fully kneading the modified mordenite prepared in step (1), the binder, extrusion aid and water prepared in step (2) into a plastic paste, extruded into strips, dried and roasted to obtain Catalyst carrier of the present invention;

[0016] (4) loading the element VIII and additives on the catalyst carrier prepared in step (3), drying and calcining to obtain the catalyst of the present i...

Embodiment 1

[0026] Example 1 (if there is no special note below, the percentages are percentages by weight)

[0027] The preparation steps of a kind of catalyst of the present invention are as follows:

[0028] (1) (1) Configure 0.5mol / L phosphoric acid aqueous solution, and then adopt the method of equal volume impregnation with mordenite (SiO 2 / Al 2 o 3 The molar ratio is 18), impregnated at 80°C for 2 hours, dried at 120°C, and roasted in air at 550°C for 5 hours to obtain a modified mordenite, denoted as S-1, wherein the weight content of phosphorus in the zeolite is 1.5 %.

[0029] (2) Mix 200 grams of ammonium chloride solution with a mass concentration of 10% (calculated as halogen), 450 grams (calculated as aluminum oxide) of aluminum hydroxide (SB produced by German Condean Company), 1000 ml of water and 60 ml of concentrated nitric acid (calculated by mass Concentration is 66.5%), mix thoroughly. An adhesive having a halogen content of 3.2% by weight (on a dry basis) was o...

Embodiment 2

[0033] The preparation of catalyst E-2 of the present invention

[0034] The preparation process of the catalyst E-2 of the present invention is the same as in Example 1, except that ammonium bromide is used instead of ammonium chloride, and ammonium dihydrogen phosphate aqueous solution is used instead of phosphoric acid. The prepared catalyst of the present invention is numbered E-2, and The catalyst composition is shown in Table 1, and the reaction results are shown in Table 2.

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Abstract

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.

Description

technical field [0001] The present invention relates to a light hydrocarbon isomerization catalyst and its application, more specifically, the present invention relates to an isomerization catalyst containing modified mordenite and the application of the catalyst in the isomerization reaction of C4-C12 alkane . Background technique [0002] Under certain conditions, n-alkanes are non-ideal components in petroleum products, and the isomerization reaction of n-alkanes is an important reaction in petroleum processing. Especially in catalytic gasoline blended with refinery residue, the content of sulfur and olefins is relatively high. Hydrodesulfurization and olefin reduction of gasoline can reduce the sulfur content to less than 10μg / g and the olefin content to less than 10v%, but at the same time significantly reduce the octane number. To reduce sulfur and olefins with little or no loss of octane, selective hydrocracking or isomerization is required. The RON of isoparaffins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/26B01J29/22C07C5/27C07C9/12C07C9/16
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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