Process for producing sterol or stanol esters by enzymatic...

Organic compounds -- part of the class 532-570 series – Organic compounds – Cyclopentanohydrophenanthrene ring system containing

Reexamination Certificate

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C552S545000, C435S052000

Reexamination Certificate

active

07078544

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; andc) 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° 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° C.

REFERENCES:
patent: 5219733 (1993-06-01), Myojo et al.
patent: 5962624 (1999-10-01), Vonderhagen et al.
patent: 01-040388 (2001-02-01), None
patent: WO 01/53511 (2001-07-01), None

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