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:
Apr. 04, 1995
Filed:
Mar. 31, 1994
Applicant:
Inventors:
Mark G Kramer, Landing, NJ (US);
Kathleen A Fix, Landing, NJ (US);
Assignee:
Drew Chemical Corporation, Boonton, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ;
U.S. Cl.
CPC ...
210710 ; 210751 ; 210912 ; 588256 ;
Abstract
A process for stabilizing metals in ash to prevent leaching of the metals is disclosed. The pH of an aqueous slurry of ash is reduced to less than 5 in the presence of an iron salt. The pH-reduced slurry is then treated with an organo sulfur containing compound and an alkaline earth metal oxide or hydroxide in specific weight proportions relative to the iron salt and to each other.