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. 04, 2002
Filed:
Feb. 02, 1999
Applicant:
Inventors:
Léon Ninane, Dombasle-sur-Meurthe, FR;
Claude Criado, Dombasle-sur-Meurthe, FR;
Assignee:
Solvay, S.A., Brussels, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01D 7/14 ;
U.S. Cl.
CPC ...
C01D 7/14 ;
Abstract
Process for producing sodium carbonate, according to which a sodium sesquicarbonate ore is successively calcined and dispersed in an aqueous solution substantially saturated with hydrated sodium carbonate and the resulting aqueous suspension is subjected to an aging, at the end of which an aqueous mixture of a powder comprising hydrated sodium carbonate crystals is collected. During the aging, a fine particle size fraction is extracted from the aqueous suspension and removed.