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:
Aug. 05, 2008
Filed:
May. 30, 2003
Wei Wu, Beijing, CN;
Bin Sun, Beijing, CN;
Yongxiang LI, Beijing, CN;
Shibiao Cheng, Beijing, CN;
Enquan Wang, Beijing, CN;
Shuzhong Zhang, Beijing, CN;
Wei Wu, Beijing, CN;
Bin Sun, Beijing, CN;
Yongxiang Li, Beijing, CN;
Shibiao Cheng, Beijing, CN;
Enquan Wang, Beijing, CN;
Shuzhong Zhang, Beijing, CN;
China Petroleum & Chemical Corporation, Beijing, CN;
Research Institute of Petroleum Processing, Sinopec, Beijing, CN;
Abstract
The present invention discloses a process for the ammoximation of carbonyl compounds, wherein a reaction in a liquid reaction system comprising a carbonyl compound, ammonia and hydrogen peroxide is carried out in the presence of a sillicon-containing catalyst, characterized in that a liquid silicon-containing assistant is added to the reaction system so that the silicon concentration in the system reaches a range of between 0.1 and 10000 ppm. In the process according to the present invention, the deactivation of catalyst due to dissolution of silicon in the catalyst can be reduced, thus lifetime of the catalyst extended and the stable operation time elongated.