Method for the production of vanillin

Details Method for the production of vanillin Method for the production of vanillin

1987-10-08

1989-07-11

Lone, Werren B.

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

Organic compounds

Oxygen containing

568426, C07C 4578

Patent

active

048474223

ABSTRACT:
The invention relates to a method for the production of vanillin in the form of a very pure product by oxidizing lignin contained in the wood pulping liquor. According to the invention the separation and purification of vanillin from the reaction mixture is carried out by means of an extraction at a supercritical pressure and temperature. Carbon dioxide, for instance, can be used as a extraction gas.

REFERENCES:
patent: 4075248 (1978-02-01), Marshall et al.
patent: 4198432 (1980-04-01), Vitzhum et al.
patent: 4474994 (1984-10-01), Makin
McDonald et al., 098(22)181320 Chemabs Journal, vol. 98, 1983, "Chemicals from Forest Products by Supercritical Fluid Extraction".

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