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. 26, 1984
Filed:
Nov. 10, 1981
Applicant:
Inventors:
Hidetoshi Akimoto, Ibaraki, JP;
Ryuichi Kaji, Kitaibaraki, JP;
Takeo Komuro, Hitachi, JP;
Yasushi Muranaka, Katsuta, JP;
Hideo Kikuchi, Hitachi, JP;
Yukio Hishinuma, Hitachi, JP;
Fumito Nakajima, Hitachi, JP;
Hiroshi Terada, Hiroshima, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B07B / ;
U.S. Cl.
CPC ...
209 49 ; 209170 ; 209171 ; 210704 ;
Abstract
Mineral impurities can be effectively removed from coal by introducing oil droplets into an aqueous slurry of pulverized coal. Coal, which is lipophilic, attaches to the surface of the oil droplets and floats upwardly along with the oil droplets utilizing their buoyancy. On the other hand, mineral impurities, which are hydrophilic, are left in the aqueous slurry.