Garrigue


Garrigue : A process for recovering glycerol from the residual liquor from the kettle soapmaking process. After separating the solid soap, the liquor is treated with aluminum sulfate, thereby precipitating the residual carboxylic acids as their insoluble aluminum salts. After removing these by filtration, the liquor is concentrated by vacuum evaporation and the glycerol distilled out under vacuum. See also: Van Ruymbeke
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