JPH119984A - Powdered emulsifier and method for producing the same - Google Patents

Abstract

(57) [Problem] To provide a powdered emulsifier having a low melting point or an amorphous property such as polyglycerin fatty acid ester, which has improved dispersibility and solubility in water, and a method for producing the same. A powdered emulsifier comprising a low melting point or amorphous emulsifier and a sugar or sugar alcohol crystal having a particle size of 149 μm sieved is adhered to the surface, and a low melting point or amorphous emulsifier and a particle size. A method for producing a powdery emulsifier, which comprises mixing and pulverizing a sugar or sugar alcohol crystal having a size of 149 μm under a low temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powdery emulsifier and a method for producing the same, and more particularly to a powdery emulsifier having a low melting point or non-crystallinity and having improved dispersibility and solubility in water. And its manufacturing method.

[0002]

2. Description of the Related Art Examples of emulsifiers that are hardly dispersible and hardly soluble in water include polyglycerin fatty acid esters, organic acid monoglycerides, sucrose fatty acid esters of unsaturated fatty acids, and sorbitan fatty acid esters.

[0003] The above-mentioned emulsifiers are usually in the form of pellets or blocks, and require strong stirring to dissolve them in water. Furthermore, many of these emulsifiers are difficult to pulverize, and even if they can be pulverized by freeze-pulverization or the like, the obtained powder solidifies when returned to room temperature and becomes a lump. In addition, there is a problem that operability in pulverization and dispersion dissolution is reduced by adhering to the inside of the pipe.

[0004] As a method of pulverizing the above-mentioned emulsifier, there is a method of using an aqueous solution of glucose, fructose, xylose, maltose, sucrose, mannitol, xylitol or the like, and kneading or spray drying to coat the surface. However,
In such a method, a long time is required for drying, and in some cases, it becomes harder to dissolve due to solidification by a sugar solution, and furthermore, there is a problem in storage due to increased hygroscopicity.

On the other hand, Japanese Unexamined Patent Publication No. 56-32955 discloses a method for easily dispersing an oil-soluble food emulsifier in water, which is disadvantageous (unevenness) of an emulsifier obtained by coating with a hydrophilic colloid substance and then spray drying. Are disclosed. This powdery emulsifier is added to the emulsifier by heating an aqueous solution of sugars and / or sugar alcohols of pentose or hexose, and the sugar and / or sugar alcohol is added to the continuous phase in the presence of a small amount of water-soluble food emulsifier. Is obtained by dissolving and emulsifying an oil-soluble emulsifier so as to obtain, followed by dehydration under reduced pressure, solidification by cooling, and pulverization. However,
Such a method is complicated in operation and requires a great deal of labor. In addition, there is a limitation in use since only the oil-soluble emulsifier is used.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a low-melting or non-crystalline emulsifier such as polyglycerin fatty acid ester which is dispersed and dissolved in water. An object of the present invention is to provide a powdery emulsifier having improved properties and a method for producing the same.

[0007]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above-mentioned emulsifier and sugar or sugar alcohol crystals having a specific particle size are mixed and pulverized at a low temperature to disperse them in water. The inventors have found that a powdery emulsifier having improved solubility can be obtained, and have completed the present invention.

[0008] That is, a first gist of the present invention is to provide a powdery powder comprising a low melting point or amorphous emulsifier and a sugar or sugar alcohol crystal having a particle size of 149 µm under a sieve attached to the surface thereof. The second gist of the present invention resides in the emulsifier,
A method for producing a powdery emulsifier, comprising mixing and pulverizing a low-melting or amorphous emulsifier and a sugar or sugar alcohol crystal having a particle size of 149 μm under a sieve at a low temperature.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The emulsifier used in the present invention is a low-melting or non-crystalline emulsifier, and specific examples thereof include (1) non-crystalline, having no specific melting point and often distributed in a wax form. Emulsifiers, for example, polyglycerin fatty acid ester, organic acid monoglyceride, paste-like lecithin, etc. (2) Although crystalline, the melting point is 40 ° C. or less, and it is difficult to melt to powder due to heat generated during pulverization. Emulsifiers include, for example, unsaturated fatty acids, sucrose fatty acid esters of lauric acid, sorbitan fatty acid esters and the like. These emulsifiers are usually distributed in the form of pellets or blocks.

The powdery emulsifier of the present invention is obtained by adhering a sugar or sugar alcohol crystal having a particle size of 149 μm or less according to JIS standard sieve to the surface of the emulsifier as described above. Sugars include lactose, glucose, sucrose, maltose, powdered starch syrup, dextrin and the like, and sugar alcohols include erythritol, mannitol, xylitol, maltitol, powdered reduced maltose syrup and the like.

Lactose is preferred among the above sugars, and erythritol is preferred among the above sugar alcohols. because,
These are slightly more difficult to dissolve than sucrose, but have less hygroscopicity and are less likely to undergo chemical changes during long-term storage. In particular, erythritol having a water content adjusted to 0.05% by weight or less does not solidify during storage, and thus has an advantage of easy handling. The solubility in water at 20 ° C (w / w)
Is 20 for lactose and 35 for erythritol as compared to sucrose 66.

The above-mentioned crystals having a particle size of 149 μm can be obtained as a commercially available product directly, or can be obtained by sieving or, if necessary, pulverizing by a usual method. In addition, erythritol crystals having a relatively large particle size are fragile compared to sucrose and easily refined.
Grind using a crusher such as a hammer mill, a screen mill, a vibrating ball mill, and a jet crusher.

Since the smaller the crystal grain size of the sugar or sugar alcohol is, the smaller the crystal grain size, the smaller the crystal grain size, the smaller the grain size is preferably 75 μm or less. When the crystal particle size is larger than the 149 μm sieve, adhesion of the emulsifier to the surface is poor, and uniform mixing with the emulsifier powder is poor.

The amount of the sugar or sugar alcohol crystals attached to the surface of the emulsifier is usually 5 to 90% by weight, preferably 20 to 90% by weight, more preferably 50 to 90% by weight, based on the total amount of the emulsifier and the sugar or sugar alcohol crystals. To 90% by weight.

The powdery emulsifier according to the present invention having improved dispersibility in water can be obtained by mixing and grinding the emulsifier and sugar or sugar alcohol crystals having a particle size of 149 μm under a low temperature. Specifically, the emulsifier and the pulverizer are cooled to at least a temperature lower than the melting point or solidification temperature of the emulsifier, mixed with sugar or sugar alcohol crystals, and the rotor is mixed so that the heat generated by the pulverization does not cause the emulsifier to melt or become irregular. Pulverize with a pulverizer such as a speed mill. As the cooling method, (1) a method in which an emulsifier or a mixture of an emulsifier and a sugar or a sugar alcohol is immersed in liquid nitrogen to freeze and then pulverize; A method of pulverizing while cooling with nitrogen, (3) a method of using these in combination, and the like.

In the above-mentioned mixing and pulverizing treatment, powders having different particle diameters are mixed with each other.
The powder is preferably mixed using a general mixer such as a mold, a horizontal cylindrical mold, a vertical screw mold, or the like. In order to prevent the emulsifier from melting due to heat generated during mixing, it is preferable to appropriately cool the apparatus and take measures for flowing liquid nitrogen. The size of the powdery emulsifier of the present invention is not particularly limited, but is usually 0.1.
The range is about 5 to 2 mm.

[0017]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist of the present invention.

Reference Example 1 (Preparation of Erythritol Fine Crystals) Erythritol (manufactured by Mitsubishi Chemical Foods Co., Ltd.) was pulverized and dried under the conditions shown in Table 1 below, and then 149 μm sieve (JIS)
(Standard sieve) to obtain erythritol fine crystals.

[0019]

[Table 1] Pulverizer M-4 type pulverizer manufactured by Nara Machinery Co., Ltd. Rotation speed 3550 (RPM), screen 0.25 (mm) Processing amount (kg / min) 10/2 Drying temperature 72 ° C Powder supply amount 30 (Kg / H), powder feeding method: electromagnetic feeder

Reference Example 2 (Production of diglycerin fatty acid monoester) 700 g of diglycerin (manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.) and 800 g of palmitic acid were added in the presence of a sodium hydroxide catalyst in the presence of 25 g.
After reacting at 0 ° C. for 2.5 hours, the mixture was cooled, unreacted diglycerin was removed and subjected to molecular distillation to obtain diglycerin fatty acid ester (monoester 70% by weight, diester 30
360% by weight).

Examples 1 to 5 and Comparative Example 1 The erythritol crystal powder obtained in Reference Example 1 and the lump of diglycerin fatty acid monoester obtained in Reference Example 2 were immersed in liquid nitrogen at a ratio shown in Table 2. After freezing, a crusher (rotor speed mill P-14: screen hole diameter 0.5 m)
m) to obtain a powdery emulsifier.

In a 400 ml glass beaker equipped with a stirrer (stirring blade: length 5 × width 1 cm), hot water at 65 ° C. was added, and while stirring at 200 rpm, the amount of emulsifier sample shown in Table 2 was added. The time until the particles were uniformly dispersed was measured. Table 2 shows the results. Comparative Example 1 is an example of an emulsifier powder obtained by freeze-pulverization without addition of erythritol. In this case, immediately after the freeze-pulverization, the powder was subjected to the above evaluation.

[0023]

[Table 2]

Since the powdered emulsifier of Comparative Example 1 produced powder as it was, it took 210 seconds (3.5 minutes) for dispersion. However, the powdered emulsifier of Example, which was mixed and ground with erythritol, was easily dispersed. When the powdery emulsifier of Comparative Example 1 was left at room temperature, it solidified into a mass after about 8 hours. On the other hand, 1 kg of the powdery emulsifier of Example 3 was filled in a polyethylene bag and stored at 35 ° C. for one month, but did not solidify.

Examples 6 to 10 In the same manner as in Example 1, except that lactose crystal powder having a particle size of 149 μm under a sieve was used in place of erythritol crystal powder at a quantitative ratio shown in Table 3. A powdered emulsifier was prepared. Then, the dispersing effect on water was examined in the same manner as in Example 1, and the results are shown in Table 3.

[0026]

[Table 3]

[0027]

According to the present invention described above, there is provided a powdery emulsifier which is excellent in dispersibility and solubility in water and does not solidify even after long-term storage.

Claims (7)

[Claims] 1. A powdery emulsifier comprising a low melting point or amorphous emulsifier and a sugar or sugar alcohol crystal having a particle size of 149 μm sieved on the surface thereof. 2. The powdery emulsifier according to claim 1, wherein the amount of the sugar or sugar alcohol crystals attached is 5 to 90% by weight of the powdery emulsifier. 3. The powdery emulsifier according to claim 1, wherein the emulsifier is one or more selected from the group consisting of polyglycerin fatty acid ester, sucrose fatty acid ester, sorbitan fatty acid ester, and organic acid monoglyceride. 4. The powdery emulsifier according to claim 1, wherein the sugar is lactose. 5. The powdery emulsifier according to claim 1, wherein the sugar alcohol is erythritol. 6. A low melting point or amorphous emulsifier and a particle size of 1
A method for producing a powdery emulsifier, comprising mixing and pulverizing sugar or sugar alcohol crystals under a 49 μm sieve at a low temperature. 7. The method according to claim 6, wherein the mixing weight ratio of the emulsifier and the sugar or sugar alcohol crystal is 10:90 to 95: 5.