JPH0453576B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for producing an emulsifier composition, and more specifically, the present invention relates to a method for producing an emulsifier composition. The present invention relates to a method for producing an emulsifier composition comprising:

Sucrose monoester of higher fatty acids (hereinafter referred to as
(hereinafter abbreviated as "SE") is a substance that has a significant demulsifying effect on oil-fat emulsions containing proteins, and glycerin or sorbitan ester of saturated higher fatty acids (hereinafter abbreviated as "GE") has an emulsion stabilizing effect. These compositions are used as additives in the production of ice creams.

[Conventional technology and its problems]

By the way, among SEs, those made of saturated higher fatty acids can be handled as fluid powders, and a homogeneous composition with GEs can be easily obtained by powder mixing. Since SE made of saturated higher fatty acids is hygroscopic, it is difficult to handle it as a powder, and it is qualitatively impossible to obtain a homogeneous composition with GE by the above procedure.

For this reason, the SE of unsaturated higher fatty acids
In the production of an emulsifier composition consisting of and GE,
In order to homogenize both components, for example, a solution mixing method or a melt mixing method is attempted.

However, in the solution mixing method, mixing is performed using a low boiling point solvent that is easily distilled, such as ethanol or ethyl acetate, but when removing the solvent from the mixture, as the distillation progresses, The mixture becomes viscous, so that it is difficult to thoroughly distill off the solvent.

[Means for solving problems]

In view of the above circumstances, the present inventors conducted research on the melt-mixing method and found that unsaturated higher fatty acids
It was found that the ease of melt mixing of SE and GE and the stability of the mixture are significantly influenced by the melting temperature.

That is, the melting points of SE and GE vary depending on the type of constituent fatty acids, but are approximately 50 to 80°C. Therefore, when heating and melting mixing of both components was attempted at various temperatures above the melting point, it was found that at temperatures near the melting point of 110 to 120°C, both were mixed uniformly during stirring, but phase separation occurred immediately when stirring was stopped. Therefore, it is difficult to obtain a uniform composition of both by cooling and solidifying. However, if melt mixing is carried out at a higher temperature within a specific range, such phase separation will not occur and a stable homogeneous mixture will be obtained.
Furthermore, such a stable homogeneous mixture has excellent fluidity when it is cooled and solidified to form a powder of an emulsifier composition, and therefore has a property that allows it to be handled as a powdered emulsifier composition. has.

The present invention was achieved based on this new knowledge, and its purpose is to improve the production of unsaturated higher fatty acids.
The purpose of the present invention is to provide a uniform and stable emulsifier composition consisting of SE and GE.

Furthermore, another object of the present invention is to provide the above-mentioned emulsifier composition which can be handled as a powder.

According to the present invention, these objects are achieved by combining a sucrose monoester of an unsaturated higher fatty acid with a glycerin or sorbitan ester of a saturated higher fatty acid.
This is easily achieved by melt mixing at 130-200°C.

The present invention will be explained in detail below.

The SE used in the present invention is a monoester of unsaturated higher fatty acids. As unsaturated higher fatty acids, mono-, di-, and trienoic acids having 14 or more carbon atoms are usually used, and specifically, myristoleic acid, palmitoleic acid, petroselic acid, petroselaidic acid, oleic acid, and elaidin. Examples include basenic acid, gondoinic acid, sorbic acid, linoleic acid, linolenic acid, ricinolenic acid, etc., but generally palmitoleic acid, oleic acid, or linoleic acid SE is used.

Further, SE includes mono-, di-, and triester, and SE having a monoester content of 60% by weight or more is usually used.

The higher fatty acids constituting the GE used in the present invention usually have 14 or more carbon atoms, and specifically include myristic acid, palmitic acid,
Examples include stearic acid, arachidic acid, behensenic acid, lignoceric acid, and the former three are generally used.

In addition, GE includes mono-, di-, and triester in either case of sorbitan or glycerin ester, but usually the monoester content is
GE of 50% or more by weight is used.

The emulsifier composition of the present invention has the above-mentioned SE and
The mixing ratio of each component varies depending on the intended use, but in general, the weight ratio of SE:GE is 1:1 to 10.
The range of

The method of the present invention melts and mixes SE and GE from 130 to
The main idea is to carry out the process at 200℃.

SE composed of unsaturated higher fatty acids used in the present invention
is more hydrophilic than SE, which is composed of saturated higher fatty acids, due to the presence of unsaturated bonds. On the other hand, GE used in the present invention is lipophilic. Therefore, the two are inherently incompatible, and therefore, even if uniform mixing is achieved by stirring, phase separation tends to occur when stirring is stopped. However, melt mixing at 130~200℃
If this is done, a homogeneous mixture with no phase separation will be obtained. Although the reason for this is not necessarily clear, it is clear that those melted and mixed at a high temperature of 130°C or higher are transparent, while those that are melted and mixed at a lower temperature are opaque. It is presumed that this is due to differences in manufacturing (structure of molecular aggregates).

Furthermore, the SE made of unsaturated higher fatty acids used in the present invention cannot necessarily be said to be a stable substance at high temperatures. The same applies to GE.
Therefore, thermal decomposition is generally expected when melt-mixing is performed at a high temperature of 130°C or higher, but surprisingly,
In a mixed system of SE and GE, both components are relatively stable, and thermal decomposition to the extent expected is not observed. However, higher temperatures than necessary are not economical, and exceeding 200°C may cause thermal decomposition problems, so the melting temperature must be below 200°C, preferably in the range of 140 to 170°C. It is better.

Melt mixing can be carried out according to known methods, for example, using a stirring tank equipped with a heating jacket. In addition, the melt-mixing method is to charge GE in a stirring tank and melt it, then add SE to it to make a mixed melt, reverse the order of addition, or mix both components in advance. Any method of melting by later charging it into a stirring tank may be used.
Alternatively, a method of dividing a predetermined amount of components into portions may also be adopted.

The time for mixing the melt is not particularly limited, but 30 to 60 minutes is usually sufficient.

A transparent mixture is obtained by melt mixing, but even if the temperature is lowered thereafter, phase separation will not occur and the mixture will not become opaque.

The emulsifier composition of the present invention thus obtained is cooled and solidified for various purposes, but is preferably powdered for ease of handling. Although various conventionally known methods can be employed as the powdering method, so-called spray cleaning is convenient.
Spray cleaning is carried out, for example, by keeping the molten mixture at its melting temperature or once lowering the temperature to 120 to 130°C, and then spraying the molten mixture from a nozzle placed facing cold air. The powdered emulsifier composition thus obtained has almost no hygroscopicity and therefore has the property of being able to be handled as a fluid powder for a long period of time.

〔Effect of the invention〕

According to the method of the present invention explained above, an emulsifier composition with excellent properties as described above can be easily obtained by simple operations, and therefore, the present invention contributes to the field of manufacturing and application of emulsifiers. It is important to do so.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 Glycerin monoester of stearic acid (mono:di-:triester (weight ratio) approximately 60:30:
80 parts by weight of the so-called medium-purity product (No. 10) was charged into a stirring tank equipped with a heating jacket and brought to a molten state at 150°C.

Next, 20 parts by weight of sucrose monoester of oleic acid (oleic acid content: 80% by weight or more, monoester content: 70% by weight or more) was added to this melt under stirring, and the mixture was stirred for 30 minutes.

The resulting transparent mixed melt was cooled to 130° C., and then sprayed from a nozzle of a spray cleaning device and brought into countercurrent contact with cold air to form a powder.

The powdered emulsifier composition thus obtained exhibits smooth fluidity, and this fluidity is 1% in the atmosphere.
No substantial change was observed even after leaving it for several months.

When the powder product was analyzed, no decomposition products were detected.

Comparative example 1 Example 1 except that the heating melting temperature was changed to 120°C
The melt-mixing process was carried out in the same manner as described above. Even after continued stirring for 2 hours, the molten mixture remained opaque and did not become transparent. When this opaque mixed molten liquid was sprayed at a spray temperature of 120°C and the powder ratio was tried in the same manner as in the example, the resulting powder was like a stagnant moisture product and was a smooth powder product. I couldn't get it.

Example 2 80 parts by weight of sorbitan monoester of stearic acid was charged into a stirring tank equipped with a heating jacket and brought to a molten state at 140°C.

Next, 20 parts by weight of sucrose monoester of oleic acid (equivalent to Example 1) was added to this melt while stirring, and the mixture was stirred for 30 minutes.

When the resulting transparent mixed melt was allowed to cool to room temperature, a solid emulsifier composition was obtained without phase separation occurring during cooling.

Comparative Example 2 Example 2 except that the heating melting temperature was changed to 110°C
The melt-mixing process was carried out in the same manner as described above. 2
Even if the stirring was continued for hours, the gel-like insoluble matter of sucrose monoester of oleic acid did not disappear, and a transparent homogeneous liquid could not be obtained.

Claims (1)

[Claims] 1. A method for producing an emulsifier composition, which comprises melt-mixing a sucrose monoester of an unsaturated higher fatty acid and a glycerin or sorbitan ester of a saturated higher fatty acid at 130 to 200°C. 2. The method for producing an emulsifier composition according to claim 1, wherein the unsaturated higher fatty acid is oleic acid. 3. The method for producing an emulsifier composition according to claim 1 or 2, wherein the saturated higher fatty acid is stearic acid.