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:
Mar. 02, 1976
Filed:
Aug. 15, 1974
Applicant:
Inventors:
Arno Singewald, Kassel-Wilhelmshohe, DT;
Gunther Fricke, Neuhof, DT;
Assignee:
Kali und Salz Aktiengesellschaft, Kassel, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03B / ;
U.S. Cl.
CPC ...
209-9 ; 2091 / ;
Abstract
An improved process is disclosed for electrostatic separation of pyrite from powdered crude coal comprising vigorously mixing the powdered crude coal with a selected fatty acid glyceride as a conditioning substance and conducting the electrostatic separation at a relative humidity of 2.5-20% and a temperature between room temperature and 100.degree. C. In a multiple stage process yields of purified coal substantially greater than those of prior art processes can be obtained.