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. 20, 2000
Filed:
Feb. 24, 1999
Applicant:
Inventors:
Stephen A Gasiorowski, Berlin, MA (US);
Frank J Hrach, Jr, Mansfield, MA (US);
Assignee:
Separation Technologies, Inc., Needham, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01C / ; C01F / ; C01G / ; C01G / ;
U.S. Cl.
CPC ...
423357 ; 423237 ; 423238 ; 423352 ; 423356 ;
Abstract
A method for removing ammonia from coal fly ash contaminated by ammonium salts is disclosed. The method involves the addition of small amounts of water, and in some cases, small amounts of an alkali source, to the fly ash to liberate the ammonia trapped therein. The ammonia liberation may be further aided by vigorous mixing of the fly ash.