Hydroisomerization catalyst, method for preparing the same, and use thereof

By modifying the catalyst with alkaline solution and using hydrothermal recrystallization, the problems of metal agglomeration and loss of acidic sites in alkane isomerization catalysts were solved, thus achieving a significant improvement in the efficiency of alkane isomerization reaction.

CN122164483APending Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing alkane hydroisomerization catalysts are prone to metal particle agglomeration during high-temperature calcination, which leads to reduced catalytic activity. Furthermore, the alkali treatment method makes it difficult to precisely control the degree of reaction, affecting the acidity and pore structure of the molecular sieve.

Method used

After the molecular sieve is modified with an alkaline solution, it is mixed with a protective agent, a silicon source and a structure directing agent. The acidity and pore structure of the molecular sieve are restored by hydrothermal recrystallization, and an active metal is introduced to form a highly dispersed metal catalyst.

Benefits of technology

It enhances the activity and selectivity of alkane isomerization reactions, maintains the acidity and pore structure of molecular sieves, promotes the uniform dispersion of metal species, and improves the performance of catalysts.

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Abstract

The application discloses a kind of hydroisomerization catalyst and its preparation method and application, the preparation method of the hydroisomerization catalyst includes the following steps: (1) after being treated with base solution, the base-treated molecular sieve is obtained by contacting molecular sieve;(2) the modified molecular sieve is obtained by mixing uniformly base-treated molecular sieve, protective agent and water, then adding silicon source and structure directing agent and carrying out hydrothermal recrystallization treatment;(3) the modified molecular sieve is ion exchanged;(4) active metal is introduced into the molecular sieve after ion exchange treatment, and the hydroisomerization catalyst is obtained by drying and calcining.The application also provides the application of the hydroisomerization catalyst in hydroisomerization reaction.The preparation method provided by the application retains the activity of the molecular sieve, and can also play a good dispersion effect on metal species, thereby improving the performance of alkane isomerization reaction.
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