Method for preparing alkane isomerization catalyst

Abstract

The invention discloses a method for preparing an alkane isomerization catalyst. The method comprises the following steps: adding a precious metal salt, silica and sodium aluminate solution into a sodium hydroxide aqueous solution of a template agent thiol silane, and carrying out a hydrothermal crystallization reaction to obtain a sodalite catalytic material encapsulated with precious metal clusters; mixing the catalytic material and acidic zeolite, and performing high-temperature activation, thereby obtaining the alkane isomerization catalyst. The catalyst prepared by the method disclosed bythe invention has high catalytic activity and selectivity and also has high sulfur resistance, the selectivity of the isomerization product is obviously increased in the alkane isomerization reaction, and the reactants can be inhibited from being excessively cracked into low carbon chain products.

Description

technical field

[0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst used for alkane isomerization reaction which is composed of packaged noble metal components and acid carrier. Background technique

[0002] Crude oil becomes heavier and worse, and the content of polycyclic aromatic hydrocarbons in diesel oil obtained by catalytic cracking is getting higher and higher. The existence of a large number of fused aromatic hydrocarbons makes diesel oil produce a lot of black smoke when it is burned, which affects the environment. Reducing the cetane number of diesel oil can not meet the requirements of environmental protection and automobile industry on indicators such as aromatics content and cetane number in diesel oil. Therefore, improving and upgrading the quality of catalytic cracking diesel oil is an important issue faced by oil processing countries in the world.

[0003] Alkane isomerization can not only...

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