Isolation process for water-soluble dyes

Details Isolation process for water-soluble dyes Isolation process for water-soluble dyes

1974-06-06

1976-07-06

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260163, 260195, 260200, C09B 4600

Patent

active

039680983

ABSTRACT:
A process for the isolation of a water-soluble solid from a mixture containing said solid and an aqueous solution of water-soluble impurity, said process comprising displacing the aqueous solution from the mixture by washing with a water-miscible organic solvent, slurrying the resulting mixture of water-soluble solid and solvent with water, removing the solvent by steam distillation and finally subjecting the resulting aqueous solution or suspension to spray drying.

REFERENCES:
patent: 2564225 (1951-08-01), Mayers
patent: 3483183 (1969-12-01), Inglemann
patent: 3575957 (1971-04-01), Demler

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