JPS5932945A - Granular deoxidizing agent - Google Patents

Abstract

PURPOSE:To provide a granular deoxidizing agent good in flowability and capable of being filled and packed continuously and automatically for a long time, obtained by coating a deoxidizing agent containing ascorbic acid, alkali metal carbonate, an iron compound, carbon black and water with a fine powder. CONSTITUTION:A deoxidizing agent obtained by mixing about 10-500pts.wt. alkali metal carbonate, about 1-200pts.wt. iron compound, 10-500pts.wt. carbon black and a proper amount of water in 100pts.wt. ascorbic acid and/or a salt thereof is coated with a fine powder with a particle size of about 100 mesh or less comprising, for example, activated carbon or gypsum to be formed into a granular shape. As ascorbic acid, L-ascorbic acid is used and, as alkali metal carbonate, Na2CO3 is used while, as the iron compound, FeCl2 or FeC>3 is used and, as carbon black, any carbon blac can be used. The particle size thereof is about 100 mesh or less and water is added after other components are mixed therein.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to particulate oxygen scavengers. More specifically, ascorbic acid and/or its salts, alkali metal carbonates,
This invention relates to a granular oxygen absorber characterized in that the oxygen absorber containing an iron compound, carbon black, and water is coated with a fine filler.

In recent years, various types of oxygen absorbers, such as iron-based ones or those using ascorbic acids, have become known as oxygen absorbers for the purpose of preventing mold, oxidation, and discoloration of foods.

Conventional oxygen scavengers using 7 scorbic acids contain fillers such as alkali carbonates or alkali hydroxides, iron compounds, water, and active carbon charcoal, along with ascorbic acids.

However, the conventional 7-scorbic acid-based deoxidizers have poor fluidity and have the following drawbacks in practical use. This is used by sealing it in a sealed system with food, but in order to package the oxygen-absorbing composition in a breathable packaging material, a die-roll method or ) (-Seal) Type 5 automatic light "A packaging" is used. The machine is used at ℃. However, in the case of self-packaging, the flowability of the oxygen absorber as a powder is not good, so during automatic packaging,
It is difficult to measure accurately and the packaging material is sealed. There was a drawback that the oxygen-absorbing composition was sealed all together in 5 minutes.In order to improve this drawback, the upper management group a! l of course
There are attempts to reduce the particle size to n particles, but if activated carbon, etc.
fl 1.・To avoid this, a large amount of binder is required.
If you use 1n grains, you can use a large amount of binder.
There was a drawback that the suction force was inhibited.

As a result of extensive research to improve the above-mentioned drawbacks, the inventors have developed a granular deoxidizer with good fluidity that can be easily filled and packaged automatically by using carbon black as a filler. It has been found that it is possible to produce a drug.

However, when continuously filling the above bulk powder using a high-speed automatic filling and packaging machine, it can be manufactured for a short time of about 1 to 2 hours without any problems, but if the bulk powder is exposed to air for a longer period of time, it will gradually change over time. There was a drawback that the bulk powder reacted and became moist granules that generated heat and increased adhesion of the bulk powder to the packaging machine, making it impossible to do so.

In order to improve these shortcomings, the present inventors further conducted research and found that ascorbic acid and/or its salts, carbonates of alkali metals, iron compounds, carbon black, and deoxidizing agents containing water were used as deoxidizers containing ascorbic acid and/or its salts. The present invention was completed by creating a granular oxygen scavenger with good fluidity that can be easily and continuously filled and packaged automatically over a long period of time by coating it with a poorly soluble fine powder.

The seven salts are L-7 sfulvin vaginalis, L-7 sulfur
1. According to the present invention, 7. Scorbino acid and/or sodium corbate or a---iso-ascol.
□ Sodium birate etc. alone or a mixture of these can be used.

Alkali metal carbonates include Na, CO3, and NaHC.
U.

8. o3f? ,, 1-1- KH9゜3 Near, I
I 1,161.4.71, Ch ”i (')
1 Salts may be used alone or in mixtures.

hi of alkali metal carbonates is ascorbic acid and/or
or its salt (100 parts), 1 part is commonly used
□ is 10 to 500 severely damaged parts, preferably 30 to 500
1250ThjJi part.
However, in the present invention, when alkali metal carbonate: CNaHCO3 or KHCO3 is used, or when RL is small even if Na2CO3 or CO, the oxygen scavenger of the present invention is O7.
As CO is absorbed, CO is generated.

In the present invention, both ferrous groups and ferric salts are preferably used as iron compounds. Specifically, FeCl2
, FeC1,, Fe50. or Fez (8
04)3:.

and salts having water of crystallization are used, among which salts having water of crystallization are particularly preferred.

As the iron compound, ascorbic acid and/or as the carbon black, any carbon black for rubber, color or battery use can be used.

Generally, l of carbon silicon is 10 to 500 l per 100 parts soaked in ascorbic acid and/or 7Ω salt.
ff, '-111 parts, preferably 50 to 200@
It is a quantity part.

The particle size of the Naori-bon blank is preferably 1001 noshi2 or less.

In the present invention, as the fine powder for applying the oxygen scavenger, water-soluble fine powder having a particle size of 100 mesosinus or less, such as activated carbon, gypsum, calcium carbonate, zeolite, perlite, fine silica powder, or iron oxide, is used. It will be done.

In the present invention, coating refers to sprinkling of granules or a mixture of granules and fine powder. It is not something that is determined by these things.

In the present invention, in order to produce a granular oxygen absorber with a fine powder of 19) t"+il, generally mixed crushed granules 1
．． False, extrusion granulation 1 size, fluidized bed granulation 4 μ, transfer ipH + blue granulation machine, :i;, It' granulation 1 size or crushing granulator are used, but among these, extrusion granulation Granulation or rolling lvb granulation (kneading is preferred.Also, there are no particular restrictions on the method of blending each component in this table, but for water, other components may be combined with ILL plywood iC1173, or iron compounds may be mixed in advance. It is preferably added after 1611+ hours in water.

In addition, the present invention has 1+5, and the granular de-removal agent has +1 t.
Not only the granular ones, but also the granular ones are great.

In the present invention, the method for stacking fine powder into granular de-P base material is generally carried out using an 18-character blender, □v
Aji blender, nauta miki ta, coachin
1.Put the granules in a concrete mixer, etc., add the granular powder, and mix.
However, it is preferable to use a method such as breaking with a coating pan, concrete mixer, etc.
A method in which fine powder is added to a rolling granulator or the like and coated is also preferred.

This will be explained in more detail below with reference to Examples.

Example Sodium Ascorbate 1 (lHjtitf15
Carbon black 1O Na, Co, 5NaHC0
After mixing the composition consisting of 312 ferrous sulfate salt 2 for 5 minutes in a co-kneader, 6 parts by weight of water was added and kneaded for an additional 5 minutes.

After kneading, a granular oxygen scavenger composition was obtained using a cylindrical extrusion granulator (mesh diameter: z%).

The above-mentioned granules were placed in a coating pan, and the silica fine powder was coated on the weight part of the granules for 5 minutes to obtain a deoxidizing composition with good fluidity.

When this was continuously filled using an automatic filling and packaging machine with a breathable packaging material made of open-pore polyethylene laminated to pure white paper, the result was 117 times.

A desaturation agent filled with 5 g of the above composition was sealed in a vinylidene chloride-1 polyethylene bag with 250 g of air, and after one day, the oxygen a degree in the bag was analyzed and found to be less than 0.1 g. The Ta II of the carbonate residue was 22.1%.

Patent applicant: Mitsubishi Gas Chemical Co., Ltd. Representative: Kazukichi Nono

Claims (1)

[Claims] A granular oxygen absorber comprising an oxygen absorber containing ascorbic acid and/or its salt alkali metal carbonate, an iron compound, carbon chloride, and water, coated with fine powder.