A catalyst for producing light aromatic hydrocarbons, a method for preparing the same, and a catalytic conversion method
CN119186636BActive Publication Date: 2026-07-14CHINA PETROLEUM & CHEMICAL CORP +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2023-06-27
- Publication Date
- 2026-07-14
AI Technical Summary
Technical Problem
Existing technologies struggle to effectively utilize the aromatic resources abundant in catalytic cracking gasoline, resulting in low efficiency in expanding aromatic feedstock and producing high-value-added products.
Method used
A catalyst is used, which consists of 10-30 wt% macroporous molecular sieve, 3-10 wt% alkali magnesium zeolite and 8-25 wt% ZSM-5 type molecular sieve. The selectivity and yield of light aromatics are improved by combining a two-stage catalytic cracking process with a gasoline cutting and aromatics extraction unit.
Benefits of technology
It achieves high conversion rate of heavy feedstock oil and high selectivity of light aromatics production, thus improving the utilization efficiency of aromatics resources.
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Figure CN119186636B_ABST
Abstract
The application discloses a catalyst for producing light aromatic hydrocarbons, a preparation method and a catalytic conversion method. The catalyst is prepared by taking heavy feedstock oil as a raw material, adopting a twice catalytic cracking process, arranging a gasoline cutting device and an aromatic hydrocarbon extraction device between the twice catalytic cracking process, and extracting, reacting or circulating materials with different properties obtained through cutting or fractionation. The second catalytic cracking catalyst is composed of a macroporous molecular sieve, an offretite and a ZSM-5 type molecular sieve and a carrier, and a stepped pore structure is formed, which is beneficial to improving the selectivity and yield of light aromatic hydrocarbons.
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