JPS60260401A - Manufacture of ice containing ozone - Google Patents

Abstract

PURPOSE:To manufacture ice contg. ozone by cooling water contg. dissolved ozone and adding a ferric compound of oxyacid in vegetable acid or oxyacid produced by the oxidation of saccharides as a catalyst immediately before freezing. CONSTITUTION:About 5ppm ozone is dissolved in water and this water is cooled. The ferric compound of oxyacid in vegetable acid or oxyacid produced by the oxidation of saccharides, e.g., ferric gluconate or ferric glycolate is added to the water as a catalyst by a small amount immediately before freezing, and the water is frozen to manufacture ice contg. ozone. When caught fishes are preserved with the ice contg. ozone on the sea, the ice maintains the freshness for a longer time than ice contg. ozone manufactured without adding the catalyst.

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a method for producing ozone ice.

"Prior Art" For the purpose of preserving the freshness of foods, the present inventor developed ozone ice, which is produced by cooling and freezing water in which ozone has been dissolved.

However, although such ozone ice is certainly effective in preserving the freshness of food, it has a problem in that its freshness preservation period is surprisingly short.

"Problems to be Solved by the Invention" Therefore, the inventor of the present invention conducted further research and conducted repeated experiments to solve these problems. ice.

It has been discovered that the above-mentioned problems can be solved by adding, as a catalyst, an oxyacid in a vegetable acid or an oxyacid secondary to oxidation of sugars, and an iron compound before electricity formation.

During the experiment, we tried using a catalyst other than the above, for example, inorganic iron ions, but in this case, the ozone oxidation reaction rate increased, but the ozone self-decomposition reaction was also accelerated, so it was not as effective. It turns out that's not the case. Furthermore, it has been found that in this case, precipitation of ferric hydroxide occurs after the reaction is completed, which significantly reduces the commercial value.

"Means for Solving the Problems" The method for producing ozone ice according to the present invention includes the above-mentioned energization, cooling the water in which ozone has been dissolved, and immediately before freezing, oxidation of oxyacids or sugars in vegetable acids. This method is characterized by adding a ferric acid compound as a catalyst. This accelerates the oxidation reaction rate of ozone and significantly extends the freshness period.

"Example" Next, examples of the present invention will be described.

Ozone water was produced by cooling water in which ozone was dissolved (ozone water), adding a small amount of ferric gluconate or ferric glycolate as a catalyst just before freezing, and freezing the water.

This ozonated water was left in the refrigerator, and after one month, it was taken out and dissolved at room temperature. The dissolved ozonated water was tested and the results were as follows.

A) Time required to sterilize Bacillus subtilis (spore-forming bacteria) when ferric gluconate is added to ozonated water with 5 ppm of ozone dissolved B) Ferric gluconate is added to ozonated water with 2 ppm of ozone dissolved Time required for sterilization of Inunaki bacteria when added C) An aqueous solution of methyl orange when ferric glycolate is added to ozonated water in which 5 ppm of ozone is dissolved.
Time required for decolorization to 40% The above dye decolorization test was based on Japanese Patent No. 412776, and shows a sterilization effect without any decolorization effect on the dye.

Furthermore, when the ozonated water produced according to the present invention was used to preserve fish caught at sea, the freshness lasted longer than when ozonated water without the addition of a catalyst was used, as a result of experiments. It was found that ozonated water has an effective period of about one month.

Furthermore, the ferric gluconate used as a catalyst in the present invention has trivalent iron ions in an aqueous solution, and the iron ions are chemically hidden and do not easily precipitate due to changes in -. It is easy to use and does not change the taste. Therefore, the quality of the product is not compromised at all.

"Effects of the Invention" According to the present invention, as mentioned above, the oxidation reaction rate of ozone is accelerated by adding the ferric compound of organic oxyacid as a catalyst, thereby significantly extending the freshness retention period of ozonated water. Now I can do it.

Claims (1)

[Claims] 1. A method for producing ozone ice, which comprises cooling water in which ozone is dissolved, and adding, as a catalyst, a ferric compound of an oxyacid produced by oxidizing an oxyacid or sugar in a vegetable acid just before freezing.