Recovery of ida and glauber's salt from waste crystal liquors

Details Recovery of ida and glauber's salt from waste crystal liquors Recovery of ida and glauber's salt from waste crystal liquors

C - Chemistry, Metallurgy

07

C

23/100, 260/533.

C07C 227/42 (2006.01) C01D 5/00 (2006.01) C01D 5/16 (2006.01) C07C 229/24 (2006.01)

Patent

CA 2026374

The separation and recovery of iminodiacetic acid and sodium sulfate decahydrate from sodium sulfate solutions such as the liquor generated in the production of iminodiacetic acid are disclosed. The separation is accomplished by adjusting the temperature of the sodium sulfate solutions to crystallize the iminodiacetic acid and sodium sulfate decahydrate. Nitrilotriacetic acid optionally can be isolated prior to the crystallization of the IDA and sodium sulfate decahydrate.

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