Alkane isomerization catalyst and preparation method thereof

Abstract

The invention relates to an alkane isomerization catalyst and a preparation method thereof. The method comprises the following steps: (1) impregnating an alumina carrier with an impregnation liquid containing a group VIII metal compound to obtain a group VIII metal-loaded carrier; (2) chlorohydrocarbon is added into aluminum oxide, a reaction is carried out at 120-380 DEG C, generated aluminum trichloride gas is carried by carrier gas to make contact with the VIII-group metal-loaded carrier obtained in the step (1) at 450-700 DEG C, chlorine is introduced into the VIII-group metal-loaded carrier, the catalyst is prepared, in the catalyst, the content of VIII-group metal is 0.01-5% by mass on the basis of a dry-basis aluminum oxide carrier, and the content of the VIII-group metal is 0.01-5% by mass on the basis of a dry-basis aluminum oxide carrier. And the chlorine content is 3.0-10% by mass. The catalyst prepared by the method is low in reaction temperature, high in isomerization activity and selectivity, and good in repeatability and activity stability.

Description

technical field [0001] The invention relates to a method for preparing an alkane isomerization catalyst and the alkane isomerization catalyst prepared by the method. Background technique [0002] With the increasingly stringent environmental protection requirements, the quality specifications of motor gasoline products are getting higher and higher. At present, my country's motor gasoline is generally characterized by insufficient high-octane components and insufficient production capacity of high-grade gasoline. It is even closer to the 2.5 volume percent of the National II standard, and the olefin content in gasoline is relatively high. The main reason is that in the blending composition of motor gasoline, the proportion of catalytic gasoline is about 80%, and the rest is reformed gasoline, a small amount of naphtha and MTBE. Catalytic gasoline has a high sulfur content (about 500 μg / g sulfur content), high olefin content (about 40 vol% in conventional catalytic gasoline)...

AI Technical Summary

Problems solved by technology

Since the alkane fraction is relatively light and the boiling points of the isomers are close, although the rectification separation device investment is low in the rectification method, the operating cost and energy consumption are high

The adsorption separation method uses the shape-selective properties of molecular sieve channels to selectively adsorb n-alkanes, so that n-alkanes and iso-alkanes can be separated. The equipment investment is large, but the operating cost is low.

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