Method of purifying eicosapentaenoic acid or the ester derivativ

Details Method of purifying eicosapentaenoic acid or the ester derivativ Method of purifying eicosapentaenoic acid or the ester derivativ

1991-06-04

1993-06-01

Bascomb, Jr., Wilbur

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 46, 203 73, 203 74, 203 75, 203 77, 554175, 554186, B01D 310, B01D 334

Patent

active

052156303

ABSTRACT:
The present invention provides a continuous method of purifying eicosapentaenoic acid and esters of eicosapentanoic acid, comprising (a) fractionally distilling a starting mixture containing eicosapentaenoic acid or esters of eicosapentaenoic acid using a system of at least three distillation columns connected in flow arrangement to separate a fraction containing eicosapentaenoic acid or esters of eicosapentaenoic acid and other C.sub.20 fatty acids from a fraction containing lower-number carbon fatty acids and from a fraction containing higher-number carbon fatty acids, and (b) continuously collecting the fraction containing eicosapentaenoic acid or esters of eicosapentaenoic acid, wherein the pressure in the distillation columns is maintained at 10 Torr or below and wherein the bottom temperature of the distillation columns is maintained at 210.degree. C. or below.
The present invention also provides a method of producing said products; using a continuous distillation process and urea adduct process by a specific apparatus construction.

REFERENCES:
patent: 4377526 (1983-03-01), Fujita et al.
patent: 4675132 (1987-06-01), Stout et al.
patent: 4804555 (1989-02-01), Marschner et al.
patent: 4971660 (1990-11-01), Rivers
patent: 5023100 (1991-06-01), Chang et al.
patent: 5077202 (1991-12-01), Seto et al.

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