Show soap lyo product the methods pursued for BO successfully extracting glycerin and soda from boap lye is describe i d in the electrical review the soap lye which is left in the manufacture of soap represents of course a waste ardd duct and the process in question enables glycerin and caustic soda to be removed from this soap lye by means ofeleo i tro lysis the anode isa plate of zino or carbon in contact with the liquor under treatment the cathode is in a porous pot the current decomposes the caus atio soda forming sodium hydrate at the cathode the glycerin is set free anile the and coloring matters are rendered insoluble and are easily removed by filtration after this treatment the insoluble matter ia separated out and the liquid is distilled forming a perfectly pure clear glycerin tho caustic soda being also practically pure and usable by the Boap maker |