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:
Feb. 17, 1976
Filed:
Mar. 25, 1974
Applicant:
Inventors:
James K Kindig, Arvada, CO (US);
Ronald L Turner, Lakewood, CO (US);
Assignee:
Hazen Research, Inc., Golden, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10L / ;
U.S. Cl.
CPC ...
44 / ; 44 / ;
Abstract
A process for improving coal wherein the raw coal is reacted with substantially undecomposed iron carbonyl which alters the apparent magnetic susceptibility of certain impurity components contained in the raw coal thereby permitting their removal by low intensity magnetic separators. The process is especially effective for removing pyrite from coal, while at the same time reducing ash and increasing the calorific value.