A heterogeneous dewaxing catalyst and a method for preparing the same
CN122141746APending 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
In the current production process of lubricating oil base oil, the liquid phase yield of catalysts is low and the product quality needs to be improved, especially the pour point and cloud point of lubricating oil are difficult to reduce effectively.
Method used
An isomeric dewaxing catalyst containing HZSM-23 molecular sieve and macroporous alumina is used. A support with suitable acidity is formed through a specific preparation method, and noble metal active components such as ruthenium, rhodium, palladium and platinum are loaded to improve the acidity and activity of the catalyst.
Benefits of technology
While increasing the liquid phase yield, it also reduces the pour point and cloud point of the lubricating oil base oil, thereby improving product quality.
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Smart Images
Figure BDA0005171113050000131
Abstract
The present application provides a kind of isomerization dewaxing catalyst and its preparation method, the catalyst contains carrier and noble metal active component, the carrier includes HZSM-23 molecular sieve and macroporous alumina;The ratio of the total 2,6-dimethylpyridine infrared B acid amount and pyridine infrared total B acid amount of the HZSM-23 molecular sieve is 65-96:100, preferably 69-93:100;The ratio of the 2,6-dimethylpyridine infrared B acid amount of desorption temperature <250 DEG C and the total 2,6-dimethylpyridine infrared B acid amount is 67-95:100, preferably 70-92:100.The isomerization dewaxing catalyst contains ZSM-23 molecular sieve with suitable acidity, when used in the production of lubricating oil process, can improve the liquid phase yield while reducing the pour point of lubricating oil base oil, cloud point, improve product quality.
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