FIELD: chemistry.
SUBSTANCE: method of increasing output of tall oil soap from black liquor, involving adding a separation-promoting additive to black liquor, said additive being selected from a group consisting of alkyl alcohol alkoxylates of formula RO[(CH2CHCH3O)x(CH2CH2O)y]M and combinations thereof, where R is a linear or branched alkyl containing about 8 to 22 carbon atoms, x ranges from 1 to 20, y ranges from about 20 to about 80 and M is H or an alkali metal.
EFFECT: invention enables to increase output of the product when separating tall oil soap from black liquor.
12 cl, 2 tbl, 1 ex
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