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:
Apr. 17, 1979
Filed:
Dec. 28, 1977
Applicant:
Inventors:
Tadashi Araki, Iwaki, JP;
Hatsuo Saito, Iwaki, JP;
Masayuki Funabashi, Iwaki, JP;
Ritaro Saito, Iwaki, JP;
Koji Seguchi, Hino, JP;
Assignee:
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
252471 ; 252454 ; 252467 ; 4232132 ; 4232135 ; 423239 ;
Abstract
A catalyst having high activity at a low temperature is obtained by heating rhodochrosite in air at a temperature of 300.degree.-500.degree. C. A catalyst having still higher activity at a low temperature is obtained by mixing rhodochrosite with a specific amount of a specific metal compound and heating the resultant mixture in air at a temperature of 300.degree.-500.degree. C.