The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 2012
Filed:
Mar. 30, 2007
Jun Long, Beijing, CN;
Kejia Xu, Beijing, CN;
Shuandi Hou, Beijing, CN;
Zhijian Da, Beijing, CN;
Chaogang Xie, Beijing, CN;
Jiushun Zhang, Beijing, CN;
Zhanzhu Zhang, Beijing, CN;
Jun Long, Beijing, CN;
Kejia Xu, Beijing, CN;
Shuandi Hou, Beijing, CN;
Zhijian Da, Beijing, CN;
Chaogang Xie, Beijing, CN;
Jiushun Zhang, Beijing, CN;
Zhanzhu Zhang, Beijing, CN;
China Petroleum and Chemical Corporation, Beijing, CN;
Research Institute of Petroleum Processing, Sinopec, Beijing, CN;
Abstract
A conversion apparatus for catalytic cracking a hydrocarbon feed to light hydrocarbon comprises at least one riser reactor, a dense bed reactor, a disengager, and a stripper. A dense bed reactor which is separated from disengage, is employed to enforce further cracking hydrocarbon to light olefins, with low methane yield. Moreover, the spent catalysts discharged from the outlet of the dense bed reactor can be introduced into the stripper via a specific catalyst transporting channel, to maintain catalyst concentration in the dense bed reactor that can be advantageous to deeper cracking of the intermediate products to produce more light olefins, particularly propylene.