| 摘要 |
PCT No. PCT/FI95/00107 Sec. 371 Date Nov. 29, 1996 Sec. 102(e) Date Nov. 29, 1996 PCT Filed Feb. 28, 1995 PCT Pub. No. WO95/23837 PCT Pub. Date Sep. 8, 1995The invention relates to a method for improving the separation of water in a tall oil preparation process which comprises: a neutralization stage in which a mixture of soap and water is neutralized with carbon dioxide, a water separation stage in which the aqueous phase containing bicarbonate is separated from the soap, and a cooking stage in which the soap obtained from the preceding stage is cooked with sulfuric acid to form tall oil, the improvement comprising the procedure that, after the neutralization with carbon dioxide but before the water separation stage, a second neutralization with sulfuric acid is carried out. The invention also relates to a process comprising the stages presented above for the preparation of tall oil. |
