ADDITIVES FOR INCREASING THE SEPARATION YIELD OF TALL OIL SOAP FROM BLACK LIQUORS

摘要

Methods of increasing the yield of tall oil soap from a black liquor are provided. In an embodiment, the method comprises adding a separation aid to the black liquor. The separation aid comprises alkyl alcohol alkoxylates of formula RO[(CH2CHCH3O)x(CH2CH2O)y]M and combinations thereof, wherein R is s traight or branched alkyl of about 8 to about 22 carbon atoms; x is 1 to abo ut 20; y is about 20 to about 80 and M is H or an alkali metal.