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. 10, 2015
Filed:
Feb. 26, 2013
Mitsubishi Rayon Co., Ltd., Chiyoda-ku, JP;
Hirokazu Watanabe, Otake, JP;
Motoo Yanagita, Yokohama, JP;
Takashi Karasuda, Yokohama, JP;
Kazufumi Nishida, Otake, JP;
Kenichi Miyaki, Otake, JP;
Mitsubishi Rayon Co., Ltd., Chiyoda-ku, JP;
Abstract
The invention relates to a method for producing acrylonitrile which includes a vapor phase catalytic ammoxidation process of performing vapor phase catalytic ammoxidation by bringing a source gas containing propylene, molecular oxygen, and ammonia into contact with a fluidized bed catalyst to obtain acrylonitrile. The method is characterized in that the fluidized bed catalyst is a catalyst containing iron, antimony, and tellurium, and the vapor phase catalytic ammoxidation process is performed while maintaining an adsorbed amount of ammonia per specific surface area (m/g) of the fluidized bed catalyst in the range of 0.01 to 0.22 μmol/m. According to the method for producing acrylonitrile of the invention, it is possible to stably maintain a high acrylonitrile yield over a long period of time.