February 3, 2014

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 63 patent authorities around the world, and other reputable web sources.

The following patent record is from the CAplusSM database.


Patent Number: US 8608944
Title: Catalytic conversion method for increasing yield of lower olefin
Inventor(s): Li, Zheng; Long, Jun; Hou, Shuandi; Da, Zhijian; Xie, Chaogang; Zhang, Jiushun; Zhang, Zhanzhu
Patent Assignee(s): China Petroleum & Chemical Corporation, Peop. Rep. China; Research Institute of Petroleum Processing, Sinopec
Source: PCT Int. Appl., 26pp. CODEN: PIXXD2
Language: English

Hydrocarbon oil and a conversion catalyst are placed in a catalytic conversion reactor comprising one or more reaction sections.  The catalytic conversion reaction occurs in the presence of an inhibitor.  The produced reaction oil gas is sepd. to give target product contg. ethylene and propylene, and the carbon-deposited catalyst is reused in the reaction section after regeneration.  The yield of ethylene is as high as 8.73 wt. percent, and the yield of propylene is as high as 29.60 wt. percent when vacuum gas oil is used as the raw material, which improves the yield by 14.4 and 26.6 percent, resp., as compared to the case without using inhibitors.

Please note:  Abstracts and Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention.

 View the full-text here.

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