JPH02290482A - Ice and manufacture thereof - Google Patents

Abstract

PURPOSE:To enable preservation, storage and transportation of ozone in a stable state for a long time by dissolving the ozone and hydrogen peroxide in water and freezing the same or by freezing ozone-containing anodic water obtained from a water electrolytic ozonizer. CONSTITUTION:Ice is manufactured by bringing a gas containing ozone into contact with cold water of 6 deg.C or below or by using ozone-containing anodic water obtained at and around an anode of a water electrolytic ozonizer. On the occasion of manufacturing the ice, rapid cooling is preferable for maintaining the ozone at high concentration in the ice and further it is preferable to conduct manufacture under a pressure. The ice thus manufactured can preserve the ozone of high concentration stably for a long time and also is easy to transport, and thus it is used suitably for production, preservation and transportation of processed foodstuffs and fishery products, in particular.

Description

[Detailed description of the invention] Hair! FIELD OF THE INVENTION The present invention relates to ozone-containing ice and a method for producing the same. More specifically, the present invention relates to ozone-containing water used for sterilization, deodorization, decolorization, freshness preservation, etc. in various fields including food processing and transportation, and a method for producing the same.

BACKGROUND OF THE INVENTION Ozone has strong oxidizing power and is widely used for sterilization, deodorization, and decolorization. However, ozone is highly reactive and extremely unstable, and usually remains in the liquid phase for several minutes to
It easily decomposes into oxygen with a half-life of several tens of minutes. In this way, it is difficult to store ozone in a stable state for a long period of time, so large-scale ozone generators are installed at sites where ozone is used, such as in water and ice treatment plants, to generate ozone. It was necessary to use it while generating it.

The present invention preserves ozone in a stable state for a long period of time so that it can be easily used for sterilization, deodorization, decolorization, freshness preservation, etc.
The present invention provides ice containing high concentrations of ozone that can be stored and transported safely and easily.

Means for Solving the Problems The present invention provides: (1) ice characterized by containing ozone and hydrogen peroxide; (2) ozone and hydrogen peroxide dissolved in water;
A method for producing ice characterized by freezing this, and ■
The present invention provides an ice manufacturing method characterized by freezing ozone-containing anode water obtained from a water electrolysis ozone generator.

When the ice of the present invention contains only ozone, the ozone-containing ice is l. O mg/kg or more, preferably 2.0 mg/kg or more, more preferably 4.0 mg/kg or more.
0 mg/kg or more. Further, when ozone and hydrogen peroxide are allowed to coexist in water, the ozone content is 0.
5 mg/kg or more, preferably I. O mg/k
g or more, more preferably 2. 5 mg/kg or more, and the content of hydrogen peroxide is at least I/too times the mole of ozone and no more than 100 times the mole, preferably 1/50 times the mole of ozone.
More than twice the mole and less than 50 times the mole, more preferably 1 times the mole of ozone
/10 times mole or more and 10 times mole or less. It is conventionally believed that when ozone and hydrogen peroxide coexist in an aqueous solution, ozone becomes extremely unstable and easily decomposes, but surprisingly, by keeping the hydrogen peroxide concentration in water within the above range. , ozone can be stored stably in ice.

To produce such ozone-containing water, an ozone-containing gas is brought into contact with cold water of 6°C or lower, preferably 4°C or lower, more preferably 2°C or lower, or further peroxidation. Ice is made after adding hydrogen. Also,
Cold water containing hydrogen peroxide at 6°C or lower, preferably 4°C or lower, more preferably 26°C or lower is prepared in advance, and ice may be made after contacting this with a gas containing ozone. . When making ice, it is preferable to rapidly cool the water in order to maintain a high concentration of ozone in the water, and it is also preferable to make the ice under pressure.

In this case, normal drinking water (tap water) may be used as the cold water, but depending on the water quality, ozone may easily decompose, so it is preferable to use ion-exchanged water, pure water with few impurities, distilled water, etc. By using such water, ice containing a high concentration of ozone can be obtained.

As the ozone-containing gas used in the present invention, it is possible to use ozonized gas generated by ordinary silent discharge methods, ultraviolet irradiation methods, electrolysis methods, and the like. The ozone concentration in ozonized gas is 1% by weight (hereinafter simply referred to as %)
The content is preferably 3% or more, more preferably 6% or more, and particularly preferably 10% or more. In particular, the gas (oxygen) containing a high concentration of ozone of 10% or more obtained by electrolysis of ice does not contain impurities such as metal dust and nitrogen oxides, so it produces clean water containing a high concentration of ozone. most preferred for

In addition, it is desirable that the temperature of the ozonized gas is low;
The temperature is 15°C or lower, preferably 10°C or lower, and more preferably around the temperature of cold ice.

Furthermore, as for the ozone-containing water used to produce the water of the present invention, ozone-containing anode water obtained near the anode of a water electrolysis ozone generator is directly used instead of absorbing ozonized gas into the water. May be used.

As the hydrogen peroxide used in the present invention, a commercially available hydrogen peroxide solution having a concentration of 30% or less can be used, and if necessary, a hydrogen peroxide solution diluted with water may be used.

In addition, when using the ozone-containing water of the present invention,
By keeping the atmosphere in a low 1 state, the effect of ozone can be controlled. For example, the effect of ozone can be alleviated by coexisting ozone-containing water and ordinary water.

1.The ice of the present invention can hold ozone in a stable state for a longer period of time than water containing ozone, and as it melts, it generates ozone gas and becomes ozone-containing water, which exhibits the effect of ozone. It can be used for various purposes such as sterilization, deodorization, decolorization, and freshness preservation.

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

In the examples, % means heavy dragon%.

Example 1 Pour 800 mf2 of tap water into an Erlenmeyer flask (IQ) and add 4
Ozone was absorbed by bubbling small bubbles of 3.1% ozonized air (silent discharge ozone) through a glass fiber filter at ℃ for 1 hour.

Then, 0.5% of 0.3% H t O t aqueous solution was added to this solution.
Add mQ and mix well. This liquid contains 8.8% ozone. 1
mg, 7 kg and hydrogen peroxide 1. 1 mg/k
It contained g. The ozone content in water is 7. 8
It was mg/kg. This water was quickly dispensed in 50 m (!) portions into <100 mf2 stoppered Meyers and the stoppers were placed. Each of the 6 Meyers was placed in a refrigerator at -5°C and -15°C to make ice. Afterwards, it was taken out and the ozone content was measured.The results are shown in Table 1 below.
Another dispensed stopper Mayer was placed in a water tank at 25° C., and the change in ozone content over time at this temperature was investigated. The results are also shown in Table 1.

As is clear from Table 1 below, the half-life of ozone in water at 25°C is within about 40 minutes, while -5
Ozone in ice at -15°C and -15°C is stable for much longer periods of time, resulting in surprising ozone preservation results.

Example 2 In Example 2, 800 mQ of distilled water was used instead of tap ice, and ozone was absorbed in the same manner as in Example 1.
．． 0.3 mQ of 3% H,0, aqueous solution was added and mixed well to prepare ozone-containing water. This liquid contains 7.7% ozone. 8 m
g/kg and hydrogen peroxide 1. It contained 0 mg/kg. This liquid was treated in the same manner as in Example 1 to prepare ozone-containing water. The results are shown in Table 1.

Example 3 In Example 1, 1.5 ml of hydrogen peroxide was used instead of 4°C tap ice. Distilled water at 4° C. containing 8 mg/kg was used to absorb ozone in the same manner as in Example 1 to prepare ozone-containing water. The ozone content in this cold water is 8.
It was 9 mg/kg. This water was treated in the same manner as in Example 1 to produce water. The results are shown in Table 1.

Example 4 Ozone generation ability 2. Ion-exchanged water at 2°C was supplied at a rate of 5001/min to the anode side of a 0 g/H water electrolysis type ozone generator, while ozone-containing water obtained at the anode was supplied at 5001/min.
It was taken out at 00 mQl minutes. This ozone-containing water 50
mi2 was taken into a stopper Meyer of IOOmC, placed in a 25 °C water tank, -5 °C refrigerator, and -15 °C refrigerator, ice was made in the same manner as in Example 1, and the change in ozone content over time was measured. did. The results are shown in Table 1.

1. It can be carried on the surface, is easy to transport, and can be used in various places and applications. Especially in the production and preservation of processed foods and seafood,
Suitable for transportation. In particular, water containing ozone and hydrogen peroxide has better sterilization, deodorization, and
Shows synergistic effects in decolorizing, preserving freshness, etc. Furthermore, according to the ice production method of the present invention, water containing ozone at a higher concentration than ever before can be obtained.

Patent applicant: Takeda Pharmaceutical Company Limited

Claims (3)

[Claims] (1) Ice characterized by containing ozone and hydrogen peroxide. (2) A method for producing ice characterized by dissolving ozone and hydrogen peroxide in water and freezing the solution. (3) A method for producing ice characterized by freezing ozone-containing anode water obtained from a water electrolysis ozone generator.