US 12,264,140 B2
Method of producing refined oils and/or fats, and method for producing tocopherols
Hiroyuki Kozui, Yokohama (JP)
Assigned to The Nisshin OilliO Group, Ltd., Tokyo (JP)
Appl. No. 17/593,023
Filed by The Nisshin OilliO Group, Ltd., Tokyo (JP)
PCT Filed Dec. 20, 2019, PCT No. PCT/JP2019/050032
§ 371(c)(1), (2) Date Sep. 3, 2021,
PCT Pub. No. WO2020/194936, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-058873 (JP), filed on Mar. 26, 2019.
Prior Publication US 2022/0177441 A1, Jun. 9, 2022
Int. Cl. C07D 311/72 (2006.01); C11B 3/12 (2006.01)
CPC C07D 311/72 (2013.01) [C11B 3/12 (2013.01)] 17 Claims
 
1. A method of producing refined oils and/or fats, comprising:
a type 1 distillation step that comprises subjecting raw material oils and/or fats to thin film distillation under a type 1 condition;
a type 2 distillation step that comprises subjecting a type 1 distillate fraction obtained after the type 1 distillation step to thin film distillation under a type 2 condition;
a type 3 distillation step that comprises subjecting a type 2 residual fraction obtained after the type 2 distillation step to thin film distillation under a type 3 condition; and
a mixing step that comprises mixing a type 1 residual fraction obtained after the type 1 distillation step and a type 3 distillate fraction obtained after the type 3 distillation step to obtain a mixed oil,
the type 1 condition including a temperature of 250° C. or more and 290° C. or less and a degree of vacuum of 0.1 Pa or less,
the type 2 condition and the type 3 condition each including a temperature lower than that in the type 1 condition and a degree of vacuum of 0.1 Pa or less,
the temperature in the type 2 condition being 5° C. or more and 15° C. or less lower than that in the type 3 condition.