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:
Jan. 22, 1991
Filed:
Nov. 16, 1988
Applicant:
Inventors:
Tatsuo Fukuyama, Kawasaki, JP;
Toshihiko Okada, Yokohama, JP;
Sanseki Moriguchi, Yokohama, JP;
Yoshio Kamiya, Kawasaki, JP;
Eisuke Ogata, Chiba, JP;
Assignee:
Nippon Kokan Kaubshiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; C01G / ;
U.S. Cl.
CPC ...
502338 ; 502516 ; 423150 ;
Abstract
When low-quality iron ore is used as a coal liquefaction catalyst, in order to improve its catalytic activity it is subjected to one or a combination of reduction, heat-treatment, or washing with or immersion in water for a long period of time so as to remove catalyst poisons before it is used as a catalyst. When high-quality iron ore is used, it is first reduced with carbon monoxide and then used as a catalyst.