Process for obtaining unsaponifiable compounds from black-liquor soaps, tall oil and their by-products
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United States of America Patent
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Oct 2, 2001
Grant Date -
N/A
app pub date -
Apr 19, 1999
filing date -
Apr 22, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for obtaining neutral compounds from black-liquor soaps, tall oil and tall oil by-products is disclosed. The method includes the steps of: (1) dehydrating black liquor soaps, neutralized tall oil, or neutralized tall oil by-products to form a dehydrated current; (2) distilling the dehydrated current in a distillation column; (3) collecting an essentially soap free distillate; and (4) collecting an essentially neutral compound free residue. Also disclosed is a method for obtaining a sterol concentrate from black-liquor soap solutions, neutralized tall oil, or neutralized tall oil by-products. In this method, a distillation operation is repeated until a current of sterols with the desired purity is obtained. The method yields a sterol concentrate with a level of purity over 96%. In another version of the method, a high purity sterol cocentrate is achieved by vacuum fractionation
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