Process for obtaining fatty acid alkyl esters, rosin acids and sterols from crude tall oil
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United States of America Patent
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Issued Date -
Jan 18, 2007
app pub date -
Feb 21, 2003
filing date -
Feb 21, 2003
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Abstract
The disclosed invention provides a process for obtaining fatty acid alkyl esters, rosin acids and sterols from crude tall oil (CTO), characterised in that the CTO is subjected to the following steps: (a) reacting the free fatty acids present in the CTO with lower alcohols; (b) separating the fatty acid lower alkyl esters thus obtained from the remaining CTO to produce a first stream of fatty acid esters; (c) esterifying the sterols in the remaining CTO with boric acid; (d) separating the remaining rosin acids from the sterol borates previously obtained to produce a second stream of rosin acids; and (e) converting said sterol borates into the free sterols to produce a third stream of free sterols.
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