C - Chemistry – Metallurgy – 01 – D
Patent
C - Chemistry, Metallurgy
01
D
C01D 5/16 (2006.01) C01B 11/14 (2006.01) C01D 3/16 (2006.01) C25B 1/26 (2006.01)
Patent
CA 2041914
Process for separating sulphate from a contaminating chromium component contained in an aqueous liquor by the crystallization of a sulphate compound. The sulphate may be separated substantially free of chromium component by adjustment of the pH to the range of from about 2.0 to about 6.5, followed by cooling of the liquor to precipitate the sulphate compound from solution which sulphate is subsequently removed. The process provides an effective method for the separation of sulphate from dichromate, and is particularly useful in the production of chlorate.
Méthode pour séparer un sulfate d'un composé chromé contaminant, présent dans une liqueur aqueuse, par cristallisation du sulfate. Le sulfate peut être séparé presque complètement du composé chromé par ajustement du pH dans une plage de 2,0 à 6.5 environ, suivi du refroidissement de la liqueur pour précipiter le sulfate de la solution, ce dernier étant ensuite séparé. La méthode est très efficace pour séparer le sulfate du dichromate, et est particulièrement utile pour la production de chlorate.
Alford Raymond E.
Mok Felix M.
Chemetics International Company Ltd.
Gowan Intellectual Property
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