Recovery of active tannin from schoene sludge

Details Recovery of active tannin from schoene sludge Recovery of active tannin from schoene sludge

1987-06-02

1988-07-05

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

560 69, C07C 6988

Patent

active

047556188

ABSTRACT:
A process for recovering active gallotannin for reuse comprising the extracting of dried schoene sludge (about 5% moisture) with a mixture of about 88 vol. % acetone--12 vol. % water to solubilize the gallotannins. The solvent is evaporated off, the residue is treated with water to solublize the gallotannins. After filtration, the clarified water solution is extracted with ethyl acetate. Evaporation of ethyl acetate leaves purified gallotannin which can be redissolved in water and spray dried to produce reusable powder. A preliminary step of separating yeast from the gallotannin protein complex involves treating with 60% acetone/40% H.sub.2 O at room temperature before making the solution about 88:12 acetone:water.

REFERENCES:
patent: 2214251 (1940-09-01), Lewis
patent: 2694725 (1954-11-01), Filachione et al.

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