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(11)    Patent No :    AP 1873   
(21)    Application No :    AP/P/2005/003449   
(22)    Filing Date :    19.05.2004   
(24)    Date of Grant &    06.08.2008           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
FR    0306362    21.05.2003
(84)    Designated State

BW  KE   T Z
 
(73) Applicant(s)

SOLVAY (SOCIÉTÉ ANONYME), Rue du Prince Albert, 33, B-1050 Brussels,
Belgium


(72) Inventors

DEMILIE Paul, Belgium

(74) Representative

HONEY & BLANCKENBERG
 


(51)  International  Classification   C01D 7/12 (2006.01)    C01D 7/14 (2006.01)
C01D 7/00 (2006.01)   


(54)    Title

Process for the manufacture of  sodium carbonate

(57)    Abstract

Process for the manufacture of sodium carbonate crystals comprising: the addition of solid sodium carbonate (1) to an aqueous solution comprising sodium bicarbonate and sodium carbonate; the crystallization and the separation of sodium sesquicar-bonate crystals; (B, C) the crystallization of sodium carbonate crystals, (E) the amount of sodium carbonate added being adjusted so that the crystallization of sesquicarbonate crystals can be carried out without preliminary evaporation of the aqueous suspension.



(56)    Documents Cited :    US 6 207 123 A    US 2 798 790 A    US 3 780 160 A

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