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US 6,552,208 B1Granted
Fractionation process
AssigneeKarlshamns AB
InventorsJari Alander, Ann-Charlotte Andersson, Håkan Malmros, Jörgen Nilsson
Life of this patent
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Abstract
The invention refers to a process for fractionating a vegetable oil giving one or more solid fractions suitable for confectionary applications as well as a liquid fraction rich in unsaponifiable biologically active components. The liquid fractions of shea butter and rapeseed oil having a high content of phytosterols and tocoferols, respectively, are useful for cosmetical and pharmaceutical preparations.
Claims24
A process comprising
- mixing an optionally pretreated vegetable oil having a melting point of 32-55° C. with a solvent in a ratio of 1:3-7 (w/v),
- heating to transparency, and then
- cooling at a rate of 0.1-1.5° C./min to a first fractionation temperature of −5 to +10° C. to form one or more precipitated solid fractions suitable for use in confectionary applications, and
- filtering in one or more steps to separate a filtrate F1,
- optionally, mixing the filtrate F1 with an additional solvent;
- cooling the filtrate F1 at a rate of 0.1-1.0° C./min to a second fractionation temperature of −30 to −5° C. to form a second precipitated solid fraction, and
- filtering in one or more steps to separate a filtrate F2;
- distilling the filtrate F2 to remove the solvent and form a liquid fraction in which the unsaponifiable, biologically active components are enriched by at least a factor 2.
5 more elements
A process comprising
- mixing optionally pretreated shea butter having a melting point of 32-38° C. with acetone in a ratio of 1:4-6 (w/v),
- heating to transparency, and then
- cooling at a rate of 0.1-0.5° C./min to a first fractionation temperature of +1 to +8° C. to form one or more precipitated solid fractions suitable for use in confectionary applications, and
- filtering in one or more steps to separate a filtrate F1,
- optionally mixing the filtrate F1 with additional acetone;
- cooling the filtrate F1 at a rate of 0.1-1.0° C./min to a second fractionation temperature of −25 to −15° C. to form a second precipitated solid fraction, and
- filtering in one or more steps to separate a filtrate F2;
- distilling the filtrate F2 to remove the solvent and form a liquid fraction in which the unsaponifiable, biologically active components have been enriched by at least a factor 3.
5 more elements
A process comprising
- mixing an optionally pretreated rapeseed oil hydrogenated to a melting point of 38-48° C. with acetone in a ratio of 1:4-6 (w/v),
- heating to transparency, and then
- cooling at a rate of 0.1-0.5° C./min to a first fraction temperature of −5 to +10° C. to form one or more precipitated solid fractions suitable for use in confectionary applications, and
- filtering in one or more steps to separate a filtrate F1,
- optionally mixing the filtrate F1 with additional acetone;
- cooling the filtrate F1 at a rate of 0.1-1.0° C./min to a second fractionation temperature of −25 to −5° C. to form a second precipitated solid fraction, and
- filtering in one or more steps to separate a filtrate F2;
- distilling the filtrate F2 to remove the acetone and form a liquid fraction in which the unsaponifiable, biologically active components are enriched by at least a factor 3.
5 more elements
Dependencies are inferred from the claim text.