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:
Feb. 17, 2009
Filed:
May. 18, 2004
Applicants:
Masaji Hirota, Niihama, JP;
Koji Hagiya, Ibaraki, JP;
Inventors:
Masaji Hirota, Niihama, JP;
Koji Hagiya, Ibaraki, JP;
Assignee:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 55/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is provided to a process for producing adipic acid which comprises making a wastewater containing hydroxycaproic acid and discharged from the step of oxidizing cyclohexane with molecular oxygen in a liquid phase react with hydrogen peroxide in the presence of a tungsten catalyst in the pH range of 0 to 6.