Improved acidification of tall oil soap using carbon dioxide

Details Improved acidification of tall oil soap using carbon dioxide Improved acidification of tall oil soap using carbon dioxide

C - Chemistry, Metallurgy

11

B

C11B 13/02 (2006.01) B01D 17/00 (2006.01) C09F 1/00 (2006.01) C11B 3/12 (2006.01)

Patent

CA 2133663

The present invention relates to the conversion of tall oil soap to produce crude tall oil. An aqueous tall oil soap solution generated in a kraft wood-pulping process is placed in contact with carbon dioxide under pressure (22), to form crude tall oil and sodium bicarbonate brine. The crude tall oil and sodium bicarbonate brine are then allowed to separate, under pressure (24), into a crude tall oil layer (28) and a sodium bicarbonate brine layer (26). The crude tall oil layer is then separated from the sodium bicarbonate brine layer, again under pressure. The separated crude tall oil may then be further refined to yield fatty acids, resin acids, and other constituents, which are useful in numerous industrial applications, such as in soaps, lubricants, inks, adhesives, and coatings.

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