JPS59232078A - Production of granular agent to preserve freshness - Google Patents

Abstract

PURPOSE:To obtain the titled agent granulated uniformly and surely, and resistant to the secondary agglomeration, by mixing an L-ascorbic acid compound, an alkali hydroxide and an alkali carbonate at least one of which is hydrated salt, a ferrous salt, and a porous substance for a definite time interval, and granulating the mixture. CONSTITUTION:(A) An L-ascorbic acid compound, (B) two or more alkaline compounds composed of an alkali metal or alkaline earth metal hydroxide or an alkali metal or alkaline earth metal (bi)carbonate at least one of which is a hydrated salt, (C) a ferrous salt, and (D) a porous substance (e.g. a substance having uniform fine pores, e.g. activated carbon, zeolite, activated alumina, etc.) are mixed with each other for a definite time interval, and granulated with a granulator. The water of crystal existing in the hydrated salt of the alkaline compound is isolated by the heat of mixing and dispersed among the powdery mixture to effect the uniform moistening of the composition. Consequently, the granulation can be carried out without using a binder, and solid granules can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a freshness-preserving agent that is enclosed in a package together with food, etc., absorbs oxygen in the package, and enables food to be stored for a long time.
The present invention relates to a method for producing a granular freshness-preserving agent.

Oxygen is responsible for most of the deterioration in food quality.
In order to improve this problem, vacuum packaging and gas exchange packaging methods have been used.

In recent years, a packaging method has been adopted in which an oxygen absorber that absorbs oxygen is enclosed in the package together with foods.

In order to increase the oxygen absorption rate, each component of this oxygen absorber is finely powdered, so when filling this oxygen absorber into a bag made of breathable material, measurement errors and powder flying up may occur. High-speed filling was not possible. Therefore, in the past, granulation processing has been carried out, and the process involves first uniformly mixing a certain amount of each component, then adding water to the mixture, humidifying it, and then extruding it into granules. I was doing it.

However, in the granules produced by the above process, it is difficult to uniformly disperse the moisture during humidification, and areas with low moisture are not granulated, and if there is a lot of moisture, the granules are soft and become secondary due to some pressure. Not only does this cause agglomeration, making it impossible to obtain granules of uniform particle size, but the surface area decreases, resulting in a decrease in the reaction rate.

The present invention is a method for producing a granular freshness-preserving agent that eliminates these drawbacks and does not cause secondary condensation even when it is made into granules.

The present invention will be explained in detail below.

The components of the freshness-preserving agent produced in the present invention are L-ascorbic acid, L-ascorbic acid isomers, or L-ascorbic acid-based compounds consisting of salts thereof, and alkali hydroxide or alkali carbonate in which at least one is a hydrated salt. consisting of two or more alkaline compounds, a ferrous salt, and a porous substance.

L-amecorbic acid compounds include L-ascorbic acid,
D-i 5cy-ascorbic acid or their sodium salts are suitable.

Alkali hydroxides are alkaline metal or alkaline earth metal hydroxides, specifically lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide, berylum hydroxide. , magnesium hydroxide, calcium hydroxide, strontium hydroxide, and radium hydroxide, while alkali carbonate is charcoal, @lJf′)”・1+“″”・1”″″
・Alkali metal or alkaline earth metal carbonates, hydrogen carbonates, or hydrated salts thereof, such as magnesium carbonate, potassium carbonate, potassium hydrogen carbonate, sodium hydrogen carbonate, and lithium hydrogen carbonate.

Ferrous salts include ferrous sulfate, ferrous chloride, ferrous hydroxide,
Ferrous carbonate is an anhydrous or hydrated salt of ferrous iron.

Porous materials are materials with uniform pores, such as activated carbon, zeolite, bentonite, activated alumina, and activated clay.

Regarding the size of the above components, ferrous sulfate heptahydrate is in the form of a fine powder of 10 mesh or more, the alkaline compound is a powder or 10 mesh or more, and the other components are in the form of a fine powder of 80 mesh or more.

Specific examples of the above components are as follows.

The manufacturing method will be explained based on the freshness preserving agent as the specific ingredient.

This is a method for producing a granular freshness-preserving agent, in which the above-mentioned components are sufficiently mixed together in a sealable mixer, and then extruded and granulated.

In the present invention, water of crystallization is liberated from an alkaline compound consisting of hydrated salts such as sodium carbonate and decahydrate during mixing due to the heat during mixing, and is dispersed in the mixed powder, distributing moisture evenly throughout the freshness-preserving agent. can be applied, and granulation can be performed reliably and uniformly.

The amount of alkaline compound consisting of this hydrated salt is 2
The range of 0 to 80% by weight is preferable, and if it is less than 20% by weight, granulation will not take place and it will remain in a powder state, and if it is more than 80% by weight, it will become filamentous during granulation, which is not preferable.

Moreover, this alkaline compound consisting of a hydrous salt functions not only to granulate but also to promote oxygen absorption reaction.

Even if the components of the present invention were mixed at once, moisture was not imparted to the freshness-preserving agent, making granulation impossible.

The granular freshness-preserving agent obtained in this way has hard granules, does not cause secondary aggregation even under some pressure, and has a smaller surface area compared to conventional powder, but is free from oxygen. There was no decrease in absorption capacity.

In addition, the particle size distribution is narrow, and filling can be carried out within an extremely small range of measurement errors.

Furthermore, according to the production method of the present invention, granulation is possible without using binders such as gum arabic, polyvinyl alcohol, alginate underlayer, glycerin, gelatin, etc. during granulation as in the past, and hard granules can be obtained as described above. was gotten.

The mixer used in the present invention may be one having a sealed structure, such as a container rotating type mixer such as a cylindrical type or a type, or a container fixed type mixer such as a ribbon type, horizontal screw type, paddle type, or planetary motion type. It is possible to use a mold mixer.

Furthermore, extrusion granulation is suitable for granulation because it can be carried out in a short time.

In this extrusion granulation method, the material to be granulated has been limited to viscous or moist materials in order to ensure smooth screw rotation and ejectability from the screen. Since the water of crystallization contained in the powder is used, it is possible to granulate the powder as it is by adding other auxiliary agents for imparting moisture.

Further, the pore size used in granulation varies depending on the particle size to be obtained, but the appropriate range is 08 to 2.8 mnφ and the screen porosity is 20 to 40%.

Next, examples of the present invention will be described.

<Example 1> 3 kg of each drug with the formulation shown in the table below, 2 empty volumes
0 stone, 60 minutes with a V-type mixer at a rotation speed of 30 times/min, 2
The mixture was mixed in a sealed state at a temperature of 0 to 25°C. This mixed chemical was applied to the screen with a hole diameter of 1.5 mm and an opening rate of 225%.
As a result of granulation using an extrusion granulation machine equipped with a screen of Granules containing particulate matter were obtained.

However, in Nos. 1 and 2, the moisture was insufficient and the granulation was poor.

In addition, although the chemical in the formulation No. 7 had sufficient moisture, it was extruded into threads from the screen during granulation, and a granular freshness-preserving agent could not be obtained.

The particle size distribution of the granular freshness-preserving agents 6 and 4 was as shown in Table 2.

Table 1 All numerical values in Table 1 above indicate parts by weight.

7- Table 2 <Example 2> After mixing the drugs 1 to 7 shown in Table 1 of Example 1 in the mixer used in Example 1 for 5 minutes at 20 to 25°C, the whole was further mixed. After heating to 40° C. and leaving for 30 minutes, granulation was performed using the same granulator as in Example 1.

As a result, drugs 3 to 6 were granulated in the same manner as in Example 1, but drugs 1, 2, and 7 could not be granulated.

patent applicant Toppan Printing Co., Ltd. Representative Kazuo Suzuki 8-

Claims (1)

[Claims] (1) A drug consisting of an L-ascorbic acid compound, at least two or more alkaline compounds consisting of an alkali hydroxide or alkali carbonate, at least one of which is a hydrated salt, a ferrous salt, and a porous substance is mixed for a certain period of time. A method for producing a granular freshness-preserving agent, which is then granulated using a granulator.