C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
C25B 3/00 (2006.01) B01D 17/06 (2006.01) B01D 57/02 (2006.01) D21C 11/00 (2006.01)
Patent
CA 2115762
2115762 9303815 PCTABS00020 The present invention relates to the direct electrolysis of tall oil soap (TOS) to produce crude tall oil (CTO). An aqueous tall oil soap solution (22) generated in a kraft wood-pulping process is placed in contact with an anode (34) in an electrolytic cell, wherein the tall oil soap is disassociated to form crude tall oil and free sodium ions. The sodium ions migrate through a membrane (36) to associate with hydroxide ions formed in a cathode chamber (38) to form NaOH, which may optionally be recycled to the kraft pulping process as a make-up chemical for lost sodium. The crude tall oil is recovered from the electrolyzed tall oil solution for further refinement. Optionally, the tall oil soap solution is treated prior to electrolysis to remove components which may interfere with the electrolysis.
Coin Richard J.
Daniels Roger W.
Elliott Joseph
Huibers Derk T. A.
Niksa Marilyn J.
Gowling Lafleur Henderson Llp
Union Camp Corporation
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