Process for producing sterol or stanol esters by enzymatic transesterification in solvent and water free media
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United States of America Patent
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Jul 18, 2006
Grant Date -
May 15, 2003
app pub date -
Jul 26, 2002
filing date -
Aug 22, 2001
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Abstract
A process for producing steryl or stanyl esters, comprises the steps of: a) forming a reacting mixture by contacting a lipase with a reactant mixture wherein the reactant mixture comprise sterols or stanols and one or more esters selected from the group consisting of esters of a fatty acid with a short chain aliphatic alcohol; b) separating the lipase from the reacting mixture to form a reacted mixture; and c) separating steryl or stanyl esters from the reacted mixture. The reaction is carried out in stirred reactors at pressures below atmospheric pressure and temperatures from 30 to 90.degree. C. The separation of esters from the reacted mixtures is carried out by distillation at low pressures.A process for esterifying sterols or stanols comprise forming a reacting mixture by contacting a lipase with a reactant mixture wherein the reactant mixture comprise sterols or stanols and one or more esters selected from the group consisting of esters of a fatty acid with a short chain aliphatic alcohol. The reaction of esterification is carried out in stirred reactors at pressures below atmospheric pressure and temperatures from 30 to 90.degree. C.
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