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:
Jun. 20, 1995
Filed:
May. 02, 1994
Applicant:
Inventors:
Ryuji Sugai, Niigata, JP;
Osamu Kondo, Ibaragi, JP;
Yuki Motoyama, Ibaragi, JP;
Shu Yoshida, Ibaragi, JP;
Assignee:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568771 ; 568741 ; 568803 ;
Abstract
Phenols are reacted with a hydrogen peroxide in the presence of a crystalline titanosilicate catalyst and a cyclic ether, such as dioxane, as a solvent. The method provides especially high para-selectivity compared with conventional methods, and, at the same time, provides high yields of dihydric phenols versus hydrogen peroxide.