Dry-mode oil/fat separation method

Patent metadata

Field	Value
Publication number	US-10472590-B2
Application number	US-201716462541-A
Country	US
Kind code	B2
Filing date	Nov 21, 2017
Priority date	Nov 28, 2016
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

The present invention addresses the problem of providing a crystallization method having excellent separation performance between a crystal fraction and a liquid fraction after crystallization in a dry-mode separation method employing stirring crystallization and compression filtration, whereby it becomes possible to produce an SUS-rich oil/fat from an SUS-containing oil/fat. In the dry-mode oil/fat separation for producing an SUS-rich oil/fat having an SUS content of 60% by weight or more from an SUS-containing oil/fat having an SUS content of 30% by weight or more, a crystalline S3 component is added to the SUS-containing oil/fat in an amount of 5 to 200 ppm by weight relative to the amount of the SUS-containing oil/fat at a temperature that is higher by 0 to 2° C. than a cloud point of the SUS-containing oil/fat so as to be mixed, and performing stirring crystallization.

First claim

The invention claimed is:

1. A crystallization method, comprising:
adding a crystalline S3 component to an SUS-containing oil/fat at 5 to 200 ppm by weight with respect to an amount of the SUS-containing oil/fat at a temperature that is 0 to 2° C. higher than a cloud point of the SUS-containing oil/fat so as to be mixed, and performing stirring crystallization, in dry-mode oil/fat separation for obtaining an SUS-rich oil/fat having an SUS content of 60% by weight or more from the SUS-containing oil/fat having an SUS content of 30% by weight or more by employing stirring crystallization and compression filtration,
wherein SUS is a 1,3-di-saturated-2-unsaturated glyceride, S3 is a tri-saturated triglyceride, S of each of SUS and S3 is a saturated fatty acid having 16 to 22 carbon atoms, and U of SUS is an unsaturated fatty acid having 18 carbon atoms.

2. The crystallization method according to claim 1 , wherein a crystalline amount of a crystal slurry subjected to the compression filtration is 10 to 20% by weight as a solid fat content.

3. The crystallization method according to claim 2 , wherein the SUS is StOSt, St of StOSt is a stearic acid, and O of StOSt is an oleic acid.

4. The crystallization method according to claim 3 , wherein the S3 component is a tri-saturated triglyceride derived from an extremely hydrogenated oil of an oil/fat that is in a liquid form at room temperature.

5. The crystallization method according to claim 3 , wherein an StOSt-containing oil/fat is any one or more kinds of transesterification reaction oils obtained by selectively introducing stearic acid into 1,3-positions of an oil/fat in which the 2-position of shea fat, sal fat, allanblackia fat, or triglyceride is rich in oleic acid.

6. The crystallization method according to claim 4 , wherein an StOSt-containing oil/fat is any one or more kinds of transesterification reaction oils obtained by selectively introducing stearic acid into 1,3-positions of an oil/fat in which the 2-position of shea fat, sal fat, allanblackia fat, or triglyceride is rich in oleic acid.

Assignees

• Fuji Oil Holdings Inc

Inventors

• Murai Kenji

Classifications

• C11B7/00

  Separation of mixtures of fats or fatty oils into their constituents, e.g. saturated oils from unsaturated oils · CPC title

• C11C3/00

  Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom (sulfonated fats or oils C07C309/62; factice C08H; drying oils C09F) · CPC title

• A23D9/02

  characterised by the production or working-up · CPC title

• C11B7/0083 Primary

  with addition of auxiliary substances, e.g. cristallisation promotors, filter aids, melting point depressors, (if a characterised solution is formed C11B7/0008) · CPC title

• C07B2200/13

  Crystalline forms, e.g. polymorphs · CPC title