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:
Sep. 20, 2016
Filed:
May. 31, 2012
Fengtang Fan, Heilongjiang, CN;
Xiaobo Wei, Beijing, CN;
Longwu Cheng, Heilongjiang, CN;
Yingxin Wu, Heilongjiang, CN;
Xiangqian Huang, Heilongjiang, CN;
Fengtang Fan, Heilongjiang, CN;
Xiaobo Wei, Beijing, CN;
Longwu Cheng, Heilongjiang, CN;
Yingxin Wu, Heilongjiang, CN;
Xiangqian Huang, Heilongjiang, CN;
FUDE (BEIJING) CHEMICAL & INDUSTRY CO., LTD., Beijing, CN;
DAQING PETROCHEMICAL ENGINEERING CO., LTD., Heilongjiang, CN;
Abstract
The provided is a process for separating by absorption the pyrolysis gas from preparation of lower carbon olefins, wherein a primary absorbent and a secondary absorbent are introduced into the demethanizer to separate by absorption the feedstock of the demethanizer through countercurrent contact therewith at a moderate temperature and pressure, thereby to obtain a top fraction primarily comprising hydrogen and methane and a bottom fraction primarily comprising the absorbents and C2+ fraction, wherein the primary absorbent essentially is a mixed Cn or Cn+ fraction, the secondary absorbent essentially is a Cn' alkane fraction or mixed Cn′ or Cn′+ fraction, and wherein n and n′ are independently 3, 4 or 5 with the proviso when the secondary absorbent is a mixed fraction, n′ is not 3.