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:
May. 11, 1999
Filed:
Nov. 12, 1997
Applicant:
Inventors:
Tsukasa Takahashi, Hyogo, JP;
Yasuhisa Emoto, Hyogo, JP;
Assignee:
Nippon Shokubai Co., Ltd., Osaka-fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568321 ;
Abstract
A method for the production of fluorenone for the vapor-phase catalytic oxidation of fluorene with a molecular oxygen-containing gas, which including adjusting the molar ratio of fluorene to molecular oxygen in a feed raw material gas composed of fluorene as a raw material and a molecular oxygen-containing gas in the range of 1:1 to 0.13:1, or keeping the sulfur content in a raw material fluorene at or below 0.15% by weight.