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:
Nov. 25, 2003
Filed:
Jun. 29, 2001
Applicant:
Inventors:
Juraj Babjak, Mississauga, CA;
Feng Zou, Mississauga, CA;
Assignee:
Inco Limited, Toronto, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 9/00 ;
U.S. Cl.
CPC ...
B01D 9/00 ;
Abstract
A method for removing sodium sulfate from nickel and ammonia containing aqueous effluents. The effluents, typically from a nickel hydroxide production process, are cooled to or below 30° C. to crystallize and precipitate the sodium sulfate and dewater the effluent. The sodium sulfate is retrieved and the remaining solution is recycled back to the nickel hydroxide production process.