JP2000053623A - Easily soluble l-sodium glutamate granule and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a L-sodium glutamate granule with a better solubility than ever. SOLUTION: This L-sodium glutamate granule having an average particle size of 50 to 1,000 μm and bulk density of at least 500 kg/m3 is obtained by granulating a powder material which mainly comprises L-sodium glutamate and has been crushed so finely as to have an average particle size of <=20 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to sodium L-glutamate granules having improved solubility and a method for producing the same.

[0002]

2. Description of the Related Art Sodium L-glutamate (hereinafter referred to as "sodium L-glutamate")
"MSG") has the power to elicit a special or unique taste, which it calls "umami", and has a synergistic effect with the umami of 5'-ribonucleotide. Generally known. The use of MSG is mainly used as a food additive as a seasoning for home use, and is also widely used in the production of processed foods.

[0003] MSG has good solubility in water,
It is a seasoning with good fluidity, low hygroscopicity and excellent powder properties. However, MSG in the crystalline form, which is widely used at present, dissolves in a seasoning solution with a high sodium chloride concentration such as miso or soy sauce, or in a vinegar mixed solution with a low pH, etc., and is slightly slow. Even when used as a seasoning on a table, problems may occur in terms of workability and seasoning effect. Generally, as a means for increasing the dissolution rate, granulation of powder can be mentioned.

Conventionally, MSG fine powder has an average particle size of 100 μm.
Improvement of solubility by granulation from a certain degree has been proposed (JP-A-58-9666). Micron order,
Since it is relatively difficult to finely pulverize on the order of several tens of microns and granulate therefrom, it has been considered that the effect of improving solubility is optimally obtained by granulating from about 100 μm. However, there is a background of the growing demand for MSG in recent years,
The demand for MSG having even higher solubility is increasing.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide MSG granules having unprecedented excellent solubility and a method for producing the same.

[0006]

Means for Solving the Problems In order to achieve the above object, the present inventors have made intensive studies on a method for further increasing the dissolution rate of MSG. As a result, MSG to be granulated was disclosed in JP-A-58-9666. The average particle size is not limited to 100 μm, but finely pulverized until the average particle size becomes 20 μm or less, and then the average particle size is 50 μm to 1000 μm.
In the range of μm, the bulk density is at least 500 kg / m ³
By granulating up to the above, MSG having more excellent solubility as compared with crystalline MSG having the same particle size range and weight and granular MSG granulated from fine powder having an average particle size of about 100 μm. It was found that granules could be obtained. Further, from the MSG thus granulated, 1 to 1
Grains having a particle size range of 00 µm are taken out, and granulated again using them as raw materials. Granules having an average particle size of 50 to 1000 µm and a bulk density of 500 kg / m ³ or more have higher solubility. And completed the present invention.

That is, the invention according to the first aspect of the present invention has an average particle diameter of 50 to 10 which is obtained by granulating a powder material mainly composed of MSG which has been finely pulverized so as to have an average particle diameter of 20 μm or less.
00 μm, at least 500 kg / m ³
It is an easily soluble MSG granule having a bulk density of 1%.
MSG granules in the range of 100 μm, which are further granulated, are easily soluble MSG granules having an average particle size in the range of 50-1000 μm and a bulk density of at least 500 kg / m ³ , (3) The invention according to (3), wherein a powder raw material mainly composed of sodium L-glutamate finely pulverized so as to have an average particle size of 20 μm or less is in the range of 50 to 1000 μm in the presence of a binder, and A method for producing easily soluble sodium L-glutamate granules, wherein granulation is performed until the bulk density reaches 500 kg / m ³ , and the invention according to claim 4 is obtained by the production method according to claim 3. The L-sodium glutamate granules are subjected to sieving to obtain L-sodium L-glutamate granules in the range of 1 to 100 μm, and then the same granulation operation is performed again. A method for producing soluble L- sodium glutamate granules.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The fine powder to be used as a raw material for easily soluble MSG granules has an average particle diameter of 20 μm or less and is obtained by pulverizing MSG crystals. Examples of the fine pulverizer to be used include an impact type such as a jet mill, a high-speed type such as a pin mill, and a ball mill using a medium. In addition, MSG starts to undergo thermal denaturation at a high temperature of 100 ° C. or more, so it is necessary to take care that the temperature does not become high during pulverization. MSG crystal is pulverized to a predetermined particle size,
A binder such as water is added, and the average particle size is 50 to 1000 μm.
Is granulated until the bulk density becomes at least 500 kg / m ³ .

In addition to water, an aqueous solution such as an aqueous solution of MSG, an aqueous solution of dextrin, or an aqueous solution of a nucleic acid-based umami substance is used as the binder. The amount of the binder to be added varies depending on the granulation method to be employed, and is generally about 1 to 30% by weight based on the raw material powder, but compared with the conventional case of granulating from about 100 μm. The addition of the binder should be done slowly so that the fines do not dissolve, and in small amounts so that no "lumps" occur.

As the granulation method, a stirring granulation method, a flow granulation method, an extrusion granulation method, a compression granulation method and the like are appropriately selected, and from the viewpoint of suppressing the solubility, the stirring granulation is particularly preferable.

The M granulated by any of the above granulation methods
The SG granules are dried and sieved as needed. The MSG granules obtained in this way have excellent solubility compared with MSG granules or MSG granules formed from fine powder of about 100 μm, if the particle size range and weight are equal.

The MSG granules obtained as described above are sieved, if necessary, and then granules having a particle size range of 1 to 100 μm are taken out of the MSG granules. Granulated by granulation method, average particle size is 50 ~
In the range of 1000 μm, the bulk density is at least 500 k
g / m ³ of MSG granules are obtained. The obtained MSG granules are
Dried and sieved as required.

The MS thus obtained by the two-step granulation method
The G granules have better solubility than the MSG granules obtained by the above-mentioned one-step granulation method, if the particle size range and the weight are equivalent.

[0014]

The present invention will be described below in detail with reference to examples.

Example 1 MSG crystals were pulverized by a jet mill pulverizer to obtain fine powder having an average particle size of 5 μm. 56 grams of 800 g of this fine powder
g of water was slowly sprayed while stirring and granulating.
Further, MSG granules were obtained by fluidized bed drying at about 80 ° C. until the drying loss was 1% or less. The loss on drying was 99 ° C,
It was determined under conditions of drying for 5 hours.

The above MSG granules are sieved to give a particle size of 425-7.
MSG granules having a bulk density of 770 kg / m ³ in the range of 10 μm were obtained. For comparison, the MSG crystal was similarly pulverized with a pin mill to obtain a fine powder having a hand average particle diameter of about 100 μm. While 800 g of the fine powder was sprayed with 80 g of water, stirring and granulation were performed. MSG granules were obtained by fluid-bed drying at about 80 ° C. until the weight loss was 1% or less.
The SG granules are sieved and the M having a particle size in the range of 425 to 710 μm
SG granules were obtained. For comparison, MSG crystals were similarly sieved to obtain MSG crystals having a particle size of 425 to 710 μm. The dissolution rates of the three were comparatively evaluated.
Table 1 shows the results.

The dissolution rate shown in Table 1 was determined by measuring the time from charging a sample to dissolving the entire sample when 200 ml of water was poured into a beaker, gently stirred with a magnetic stirrer, and 2 g of the sample was charged therein. It was measured.

[0018]

[Table 1]

Example 2 MSG crystals were pulverized by a jet mill pulverizer to obtain fine powder having an average particle size of about 5 μm. While 800 g of the fine powder was slowly sprayed with 56 g of water, stirring granulation was performed. Further, MSG granules were obtained by fluidized bed drying at about 80 ° C. until the drying loss was 1% or less.

The MSG granules are sieved to a particle size of 100-2.
MSG granules having a bulk density of 630 kg / m ³ in the range of 50 μm were obtained. For comparison, MSG crystals were similarly sieved,
MSG crystals having a particle size range of 100 to 250 μm were obtained. For both, the dissolution rates were compared and evaluated. Table 2 shows the results.

[0021]

[Table 2]

Example 3 MSG crystals were pulverized by a jet mill pulverizer to obtain fine powder having an average particle size of 5 μm. 56 grams of 800 g of this fine powder
g of water was slowly sprayed while stirring and granulating.
Further, after drying in a fluidized bed at about 80 ° C. until the loss on drying was 1% or less, sieving was performed to obtain 100 g of MSG granules having a particle size range of 1 to 100 μm. Perform the same operation eight times,
800 g of MSG granules having a particle size range of １００100 μm were obtained.
While 800 g of the MSG granules were slowly sprayed with 56 g of water, stirring granulation was performed. Further, MSG granules were obtained by fluidized bed drying at about 80 ° C. until the drying loss was 1% or less.

The above MSG granules are sieved and the particle size is 100 to 2
MSG granules having a bulk density of 610 kg / m ³ in the range of 50 μm were obtained. The MSG granules obtained in Example 2 and their dissolution rates were comparatively evaluated. Table 3 shows the results.

[0024]

[Table 3]

[0025]

As described above, the average particle size is 20 μm.
By granulating the following fine powder MSG, the solubility can be significantly improved.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshio Ito 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Ajinomoto Co., Ltd. F-term (reference) 4H006 AA02 AA05 AD15 BS10 NB17

Claims (4)

[Claims] An average particle diameter obtained by granulating a powder material mainly composed of sodium L-glutamate finely ground to have an average particle diameter of 20 μm or less is in a range of 50 to 1000 μm, and at least 500 kg / Soluble sodium L-glutamate granules having a bulk density of m ³ . 2. The sodium L-glutamate granule according to claim 1 which is subjected to sieving to give L-glutamate in the range of 1 to 100 μm.
Sodium glutamate granules are obtained, and the granules are further granulated to have an average particle size in the range of 50 to 1000 μm and a bulk density of at least 500 kg / m ^3.
Sodium glutamate granules. 3. A powder raw material mainly composed of sodium L-glutamate finely pulverized so as to have an average particle diameter of 20 μm or less in the presence of a binder to have an average particle diameter of 50 to 1000 μm.
And producing granules having a bulk density of at least 500 kg / m ³ , wherein the granules have a bulk density of at least 500 kg / m ³ . 4. The sodium L-glutamate granule obtained by the production method according to claim 3, which is subjected to sieving to obtain 1 to 1 granules.
A method for producing easily soluble sodium L-glutamate granules, comprising obtaining granules of sodium L-glutamate having a particle size in the range of 00 µm and then performing the same granulation operation again.