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:
Oct. 07, 2014
Filed:
Jul. 27, 2007
Huiling Zhang, Daqing, CN;
Longwu Cheng, Daqing, CN;
Zhiyuan Song, Daqing, CN;
Xiaojian Min, Beijing, CN;
Huiling Zhang, Daqing, CN;
Longwu Cheng, Daqing, CN;
Zhiyuan Song, Daqing, CN;
Xiaojian Min, Beijing, CN;
China MTO Limited, Hong Kong, CN;
Daqing Petrochemical Engineering Co., Ltd., Daqing, Heilongjiang, CN;
Abstract
The present invention provides a method for preparing the polymer grade low-carbon olefin through separation of the methanol pyrolysis gas, including steps of the compression, impurity removal, and absorption and separation. In the absorption and separation step, the pyrolysis gas is sent to the front-end ethylene removing column, and then is, with the C4 absorbent, further absorbed and separated to produce polymer grade ethylene products, polymer grade propylene products, and C4 and C5 products. The moderate-temperature and moderate-pressure separation without a cold box according to the present invention provides safer production process, less investment in the equipment, as well as easier separation and lower energy consumption as a result of the front-end ethylene removing and C4 absorption and separation process.