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:
Oct. 21, 2014
Filed:
Dec. 17, 2012
Solvay SA, Brussels, BE;
Hugo Walravens, Meise, BE;
Kurt Allen, Green River, WY (US);
Thoi-Dai Chau, Bad Hoenningen, DE;
Alain Vandendoren, Brussels, BE;
Solvay SA, Brussels, BE;
Abstract
A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising sodium carbonate and an alkaline metal salt impurity at a concentration C(A), comprising: a) mixing the stream (A) with part of a stream (B), b) bicarbonating the resulting mixed stream with a gas comprising COto produce an aqueous suspension comprising sodium bicarbonate crystals (F), c) separating the sodium bicarbonate crystals (F) from the aqueous liquor (G), d) partly debicarbonating at least part of (G) and removing part of the water of (G) to obtain the stream (B) with the salt impurity at a concentration C(B), e) recycling part of the stream (B) to step a) so that the ratio of the concentrations C(B)/C(A) of the impurity is at least: 1.4, and f) removing the remainder (I) of the stream (B) or the remainder (J) of the liquor (G) to be further processed.