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:
Nov. 24, 2015
Filed:
Sep. 22, 2011
Xin Wen, Shanghai, CN;
Linghua Zuo, Shanghai, CN;
GE Luo, Shanghai, CN;
Xiaoqi Zhao, Shanghai, CN;
Yan Zhuang, Shanghai, CN;
Xiaodong Chu, Shanghai, CN;
Jingming Shao, Shanghai, CN;
Xin Wen, Shanghai, CN;
Linghua Zuo, Shanghai, CN;
Ge Luo, Shanghai, CN;
Xiaoqi Zhao, Shanghai, CN;
Yan Zhuang, Shanghai, CN;
Xiaodong Chu, Shanghai, CN;
Jingming Shao, Shanghai, CN;
SHANGHAI HUAYI ACRYLIC ACID CO. LTD., Shanghai, CN;
Abstract
The present invention provides a process for regenerating a deactivated heteropolymolybdophosphoric acid catalyst, comprising the steps of grinding the deactivated catalyst into particles having a particle size of 40 mesh or less, mixing the particles with a mixture comprising aqua ammonia, an aqueous solution containing ammonium ions and organic auxiliaries, kneading the same in a kneader to obtain a paste, drying the paste, molding the paste into cylindrical particles with a through hole in its longitudinal axis, and heating the paste in atmosphere at 350˜450° C. for 1˜10 hours to produce the generated catalyst.