Separation of phosphoric acid from aqueous solutions of...

Details Separation of phosphoric acid from aqueous solutions of... Separation of phosphoric acid from aqueous solutions of...

C - Chemistry, Metallurgy

07

F

260/262.3

C07F 9/6558 (2006.01) C07F 9/655 (2006.01)

Patent

CA 2012928

Phosphoric acid is separated from aqueous solutions of thiamine phosphates which are obtained in the phosphorylation of thiamine, with or without subsequent partial hydrolysis, by a process in which the phosphoric acid is converted with a virtually water-insoluble or only slightly water-soluble tertiary amine into the corresponding salt and the latter is extracted with a virtually water-immiscible or only slightly water-miscible solvent of moderate polarity. In a particularly advantageous procedure, the phosphoric acid is extracted with a mixture of a virtually water-insoluble or only slightly water-soluble tertiary amine and a virtually water-immiscible or only slightly water-miscible solvent of moderate polarity.

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