Purification of vanillin

Details Purification of vanillin Purification of vanillin

1982-09-13

1984-10-02

Helfin, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

203 39, C07C 4578

Patent

active

044749945

ABSTRACT:
Crude vanillin is purified by supercritical extraction of impurities. The process is especially useful in purifying crude vanillin obtained from paper mill waste liquors. Preferred supercritical extraction fluid is CO.sub.2.

REFERENCES:
patent: 3477856 (1969-11-01), Schultz
patent: 4075248 (1978-02-01), Marshall et al.
patent: 4198432 (1980-04-01), Vitzthum et al.

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