# US 8,772,518 B2 · Dry fractionation method for oil or fat

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- Number: US 8,772,518 B2
- Document ID: US8772518B2
- Status: Granted
- Kind: B2
- Application number: 13/995,680
- Filed: 2011-12-19
- Published: 2013-10-17
- Granted: 2014-07-08
- Earliest claimed: 2010-12-22
- Assignees: Fuji Oil Company, Limited
- Applicants: Kenji Murai; Kazuhisa Ogawa; Shin Yoneda
- Inventors: Kenji Murai; Kazuhisa Ogawa; Shin Yoneda
- Web page: https://patentgrep.com/patent/US8772518B2

## CPC

- C11B 7/0083: {with addition of auxiliary substances, e.g. cristallisation promotors, filter aids, melting point depressors, (if a characterised solution is formed C11B7/0008)}
- A23D 9/007: characterised by ingredients other than fatty acid triglycerides
- C11B 3/008: {by filtration, e.g. including ultra filtration, dialysis (C11B3/005 takes precedence)}
- C11B 7/0075: {by differences of melting or solidifying points}
- C11B: PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES (drying-oils C09F)
- A23D: EDIBLE OILS OR FATS, e.g. MARGARINES, SHORTENINGS OR COOKING OILS (preservation thereof A23B20/00; production, refinement or preservation of animal or vegetable fats or oils C11B, C11C)

## Abstract

The purpose of the present invention is to provide a method, whereby, in the dry fractionation of an oil or fat, a decrease in solid-liquid separation efficiency, said decrease being caused by the engulfment of a filtrate fraction into a crystal fraction after crystallization and press filtration, can be prevented and thus the crystal slurry can be efficiently separated after the crystallization. A method for the dry fractionation of an oil or fat, said method comprising, before or after crystallization, adding a definite amount of a filtration aid followed by mixing and then press-filtering the thus obtained crystal slurry. Thus, the crystal slurry can be easily separated into a crystal fraction with little engulfment of a liquid fraction and the liquid fraction.

## Claims

### Claim 1

A method of separating a crystal during a dry fractionation of oil-and-fat comprising, adding and mixing a filtration aid to a crystal slurry after crystallization in an amount of 15 to 120% by weight with respect to a solid fat content crystal amount in the crystal slurry and subjecting the mixture to press-filtering, wherein:
the solid fat content crystal amount in the crystal slurry is 10 to 35% by weight,
the filtering aid is at least one selected from diatomaceous material, perlite material, and glass beads, and
the filtration aid has an average particle diameter of 1 to 60 μm.

### Claim 2 (depends on 1)

The method of separating a crystal according to claim 1, wherein the solid fat content crystal amount in the crystal slurry is 12 to 30% by weight as a solid fat content.

### Claim 3 (depends on 1)

The method of separating a crystal according claim 1, wherein the amount of the filtration aid is 15 to 80% by weight with respect to the solid fat content crystal amount.

### Claim 4 (depends on 1)

The method of separating a crystal according to claim 1, wherein the oil-and-fat is SUS-containing oil-and-fat wherein S represents a saturated fatty acid having 16 to 22 carbon atoms and U represents an unsaturated fatty acid having 16 to 18 carbon atoms.

### Claim 5 (depends on 4)

The method of separating a crystal according to claim 4, wherein the SUS-containing oil-and-fat is StOSt-containing oil-and-fat wherein St represents stearic acid, and O represents oleic acid.

### Claim 6 (depends on 5)

The method of separating a crystal according to claim 5, wherein the oil-and-fat that is a StOSt-containing oil-and-fat is one or more of shea butter, sal fat, allanblackia fat, or an interesterified oil obtained by introducing stearic acid selectively into 1,3-positions of an oil-and-fat rich in oleic acid at a 2-position of a triglyceride of the oil-and-fat.

### Claim 7 (depends on 2)

The method of separating a crystal according to claim 2, wherein the amount of the filtration aid is 15 to 80% by weight with respect to the solid fat content crystal amount.

### Claim 8 (depends on 2)

The method of separating a crystal according to claim 2, wherein the oil-and-fat is SUS-containing oil-and-fat wherein S represents a saturated fatty acid having 16 to 22 carbon atoms and U represents an unsaturated fatty acid having 16 to 18 carbon atoms.

### Claim 9 (depends on 3)

The method of separating a crystal according to claim 3, wherein the oil-and-fat is SUS-containing oil-and-fat wherein S represents a saturated fatty acid having 16 to 22 carbon atoms and U represents an unsaturated fatty acid having 16 to 18 carbon atoms.

### Claim 10 (depends on 7)

The method of separating a crystal according to claim 7, wherein the oil-and-fat is SUS-containing oil-and-fat wherein S represents a saturated fatty acid having 16 to 22 carbon atoms and U represents an unsaturated fatty acid having 16 to 18 carbon atoms.

### Claim 11 (depends on 8)

The method of separating a crystal according to claim 8, wherein the SUS-containing oil-and-fat is StOSt-containing oil-and-fat wherein St represents stearic acid, and O represents oleic acid.

### Claim 12 (depends on 9)

The method of separating a crystal according to claim 9, wherein the SUS-containing oil-and-fat is StOSt-containing oil-and-fat wherein St represents stearic acid, and O represents oleic acid.

### Claim 13 (depends on 10)

The method of separating a crystal according to claim 10, wherein the SUS-containing oil-and-fat is StOSt-containing oil-and-fat wherein St represents stearic acid, and O represents oleic acid.

### Claim 14 (depends on 8)

The method of separating a crystal according to claim 8, wherein the oil-and-fat that is a StOSt-containing oil-and-fat is one or more of shea butter, sal fat, allanblackia fat, or an interesterified oil obtained by introducing stearic acid selectively into 1,3-positions of an oil-and-fat rich in oleic acid at a 2-position of a triglyceride of the oil-and-fat.

### Claim 15 (depends on 9)

The method of separating a crystal according to claim 9, wherein the oil-and-fat that is a StOSt-containing oil-and-fat is one or more of shea butter, sal fat, allanblackia fat, or an interesterified oil obtained by introducing stearic acid selectively into 1,3-positions of an oil-and-fat rich in oleic acid at a 2-position of a triglyceride of the oil-and-fat.

### Claim 16 (depends on 10)

The method of separating a crystal according to claim 10, wherein the oil-and-fat that is a StOSt-containing oil-and-fat is one or more of shea butter, sal fat, allanblackia fat, or an interesterified oil obtained by introducing stearic acid selectively into 1,3-positions of an oil-and-fat rich in oleic acid at a 2-position of a triglyceride of the oil-and-fat.