A hydroconversion process for hydrocracking light naphtha

CN122146335APending Publication Date: 2026-06-05CHINA 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
2024-12-05
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively convert isoalkanes in hydrocracking light naphtha into n-alkanes, resulting in low-quality ethylene feedstock.

Method used

A fixed-bed reactor is used, in which hydroconversion catalysts containing ZSM-5 molecular sieve and mordenite are sequentially loaded along the flow direction. Through a graded catalyst bed, isoparaffins are converted into n-paraffins by utilizing the high cracking performance of ZSM-5 molecular sieve and the normalization performance of mordenite.

Benefits of technology

This increased the proportion of n-alkanes in the hydrogenation conversion products, reduced hydrogen consumption in the reaction, simplified the process flow, lowered equipment investment and operating costs, and improved the ethylene yield of the ethylene plant.

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Abstract

The application discloses a hydroconversion method of hydrocracking light naphtha. The method comprises the following steps: (1) mixing the hydrocracking light naphtha with hydrogen and performing hydroconversion reaction through a hydroconversion reaction zone; the hydroconversion reaction zone is sequentially filled with a hydroconversion catalyst containing ZSM-5 molecular sieve and a hydroconversion catalyst containing mordenite along a flow direction; (2) the reaction effluent of step (1) enters a separation system to obtain hydrogen-rich gas and a hydroconversion product. The method can realize efficient conversion of different molecular hydrocarbons, thereby improving the proportion of n-alkanes in the hydrogenation product.
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