JP2013108659A - Method for producing hydrogen-containing ice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing hydrogen-containing ice with hydrogen contained.SOLUTION: Firstly, magnesium hydride is produced. In this case, pulverization is performed so that the mean particle diameter of magnesium hydride particles is preferably set to 0.1-20 μm, more preferably set to 0.1-5 μm. The produced granular magnesium hydride is put in water cooled to about 2°C, agitated by an agitator, and suspended. Further, magnesium hydride suspension is subjected to rapid ice making by an ice making device. When ice is produced, hydrolysis reaction of the magnesium hydride makes progress. Therefore, in the ice, the magnesium hydrate and hydrogen exist in the ice, and the hydrogen exists in the ice as dissolved hydrogen and bubbles.

Description

  The present invention relates to a method for producing ice containing hydrogen.

  Hydrogen contained in hydrogen water (electrolytically reduced water) acts only on harmful hydroxyl radicals in the active oxygen produced in the body to make them harmless, thereby suppressing aging and maintaining the health of the human body. . As a method for producing hydrogen water, for example, as described in Patent Document 1, there is a method of generating water by electrolyzing water at normal temperature and pressure.

  However, the solubility of hydrogen in water is 1.6 ppm at maximum under normal temperature and normal pressure, and the method described in Patent Document 1 has a problem that water containing a larger amount of hydrogen than the saturation amount cannot be produced.

Japanese Patent No. 3349710

  An object of the present invention is to provide a method for producing ice containing a larger amount of hydrogen than the saturation amount.

  The method for producing hydrogen-containing ice according to the present invention is characterized in that a liquid produced by mixing granular magnesium hydride with water is made into ice.

  Magnesium hydride generates hydrogen by a hydrolysis reaction represented by the formula (1). The generated hydrogen is dissolved in the magnesium hydride suspension, and in the form of bubbles, it is present in ice. Thereby, ice containing hydrogen containing a larger amount than the saturation amount of hydrogen with respect to water can be made.

  The method for producing hydrogen-containing ice according to the present invention is characterized in that the granular magnesium hydride has an average particle size of 0.1 μm or more and 20 μm or less.

  The average particle diameter of the magnesium hydride particles is a 50 wt% diameter obtained by measuring the particle size distribution of the magnesium hydride. The 50 wt% diameter is a particle diameter having a 50% cumulative frequency. That is, the particle size is obtained when the magnesium hydride particles having a smaller particle size are accumulated in order and the accumulated value reaches 50%. When the average particle size exceeds 50 μm, the hydrolysis reaction may not be sufficiently performed. On the other hand, if the average particle size is too small, the hydrolysis reaction is almost completed before ice making and hydrogen bubbles are formed and released into the atmosphere, making it difficult to make ice containing a large amount of hydrogen. Therefore, the average particle size of magnesium hydride is desirably about 0.1 μm or more and 20 μm or less.

  The method for producing hydrogen-containing ice according to the present invention is characterized in that the granular magnesium hydride has an average particle size of 0.1 μm or more and 5 μm or less.

  In order for the hydrolysis reaction to be sufficiently performed, the average particle size of magnesium hydride is more preferably 0.1 μm or more and 5 μm or less.

  According to the present invention, a magnesium hydride suspension in which granular magnesium hydride is added to water and stirred and mixed with water is rapidly cooled to generate ice in the produced ice by a hydrolysis reaction. The dissolved hydrogen is dissolved, and the generated hydrogen bubbles are included. Therefore, ice containing a larger amount of hydrogen than the saturation amount can be made.

It is a block diagram which shows a magnesium hydride particle manufacturing apparatus. It is a schematic diagram which shows the ice making apparatus in this invention. It is a schematic diagram which shows a mode that the magnesium hydride suspension was made into ice.

  Embodiments of the present invention will be described. Hereinafter, a method for producing ice according to the present embodiment will be described. First, magnesium hydride particles having an average particle size of 0.1 μm to 5 μm are generated.

  FIG. 1 is a block diagram showing an apparatus for producing magnesium hydride particles. The apparatus for producing magnesium hydride particles includes a jet crusher 1 of an interparticle collision type.

  The jet crusher 1 includes a cylindrical mill, and a plurality of crushing nozzles and one raw material supply port are equally arranged in the circumferential direction on the inner peripheral surface of the mill. The raw material supply port is provided with a feeder vibratory feeder 2 for supplying magnesium hydride coarse particles having an average particle size exceeding 5 μm to the jet crusher 1. The pulverizing nozzle is provided with a compressor 3 for supplying compressed gas to the jet pulverizer 1 via an air filter 4. The maximum discharge pressure by the crushing nozzle is 1.57 MPa. Further, the mill is appropriately equipped with a collector 5 for collecting magnesium hydride particles having an average particle diameter of 0.1 μm or more and 5 μm or less pulverized by the jet pulverizer 1. The collector 5 is, for example, a cylindrical filter cloth.

  The magnesium hydride coarse particles supplied from the raw material supply port to the inside of the mill are accelerated while swirling by the high-pressure jet stream injected from the pulverizing nozzle, and are pulverized by collision between particles. In addition, since the magnesium hydride coarse particles are configured to rotationally accelerate inside the cylindrical mill, there are few particle collisions with the inner peripheral wall of the mill, and there is little risk of contamination due to scraping of the mill wall surface.

  These apparatuses are used to produce magnesium hydride coarse particles having an average particle size exceeding 5 μm. Magnesium hydride coarse particles are obtained by reacting raw material particles containing magnesium as a main component with hydrogen gas as shown in the formula (2).

  The detailed reaction procedure is as follows. First, the raw material particles containing magnesium as a main component are kept in a hydrogen gas atmosphere sealed in a sealed container, and the pressure of the hydrogen gas atmosphere in the sealed container is maintained at a predetermined pressure. The temperature of the hydrogen gas atmosphere in the enclosure is increased from room temperature, and the temperature of the hydrogen gas atmosphere in the enclosure corresponds to the predetermined pressure on the equilibrium curve between the reaction in which the magnesium and hydrogen molecules combine to produce magnesium hydride and the reverse reaction. The first temperature is maintained at a first temperature that is higher than the temperature at which the temperature difference is within 100 ° C. from the temperature. Specifically, the pressure of hydrogen gas is 4 MPa, the first temperature is 550 ° C., and the first period is 1 hour. The coating on the surface of the raw material particles is removed by the above-described treatment.

  Next, without returning the temperature of the hydrogen gas atmosphere in the enclosure to room temperature, the temperature is lower than the temperature corresponding to the predetermined pressure on the equilibrium curve, and the temperature difference from the temperature is within 100 ° C. The second period is maintained. Specifically, the second temperature is 400 ° C. and the second period is 20 hours. By this treatment, magnesium hydride can be produced from the raw material particles.

  Using the feeder vibration feeder 2, the magnesium hydride coarse particles are supplied to the jet pulverizer 1. Next, by supplying high-pressure gas to the jet pulverizer 1, the magnesium hydride coarse particles are pulverized into magnesium hydride particles having an average particle size of 0.1 μm to 5 μm, and the pulverized magnesium hydride particles are recovered. Finish the manufacturing process. The particle size distribution of magnesium hydride is measured by, for example, a wet method (medium: IPA) using a laser diffraction particle size distribution analyzer (product name: CILAS 1064, manufactured by CILAS).

  In addition, if the average particle diameter of the magnesium hydride particles is 0.1 μm or more and 20 μm or less, a desirable effect of promoting the hydrolysis reaction can be obtained. Magnesium hydride particles having an average particle size of 0.1 μm or more and 20 μm or less can also be produced by the same steps as in the case of the average particle size of 0.1 μm or more and 5 μm or less.

  The magnesium hydride produced in this way is forcibly stirred and mixed with water to produce a magnesium hydride suspension. In order to perform ice making quickly, it is desirable that the water temperature is close to 0 ° C., which is about 2 ° C. in the present embodiment. The magnesium hydride suspension undergoes a hydrolysis reaction, and hydrogen is dissolved to a saturation amount. Moreover, hydrogen is produced | generated by hydrolysis reaction and it exists as a bubble in water. In addition, 15.2 wt% hydrogen of magnesium hydride is generated by the hydrolysis reaction.

  The hydrogen bubbles generated in the magnesium hydride suspension by the hydrolysis reaction merge with each other to form larger bubbles. Since the bubbles increase in buoyancy as they become larger, they rise in water and are released into the atmosphere. In order to prevent such release into the atmosphere, the magnesium hydride suspension is rapidly cooled and iced.

  Therefore, since the ice contains dissolved hydrogen and bubble hydrogen, the ice containing the hydrogen having a concentration higher than the saturation amount is produced.

  Assuming that hydrogen is ingested by putting ice in a beverage liquid, it is desirable that the ice contains as much hydrogen as possible in terms of ingestion efficiency. However, if too much hydrogen is mixed, ice may melt and hydrogen gas may be rapidly generated. Therefore, for example, it is desirable to mix 0.1 g or more and 1.0 g or less of magnesium hydride in 1 liter of water, and it is more desirable to add 0.4 g or more and 0.6 g or less of magnesium hydride.

  FIG. 2 is a schematic view showing an ice making device according to the present invention. The ice making device is provided below the ice tray 12 with an ice tray 12 having a plurality of recesses 12a opened downward at the center upper portion of the container 11 and can be bonded and separated from the basket of the ice tray 12. A flat liquid supply plate 14 is provided. The movement of the liquid supply plate 14 is performed by a rotating shaft 13 provided in the horizontal direction near one end of the liquid supply plate 14 and rotated by a motor (not shown). A cooling device 15 is bonded to the back surface of the ice tray 12 having the recess 12a.

  The liquid supply plate 14 is provided with a liquid supply hole 14 a at a position corresponding to each of the recesses 12 a, and the liquid supply hole 14 a is connected to the liquid supply pump 17 through the hose 16. The liquid supply pump 17 stores the above-described magnesium hydride suspension.

  The rotating shaft 13, the cooling device 15, and the liquid supply pump 17 are connected to the control unit 18. The control unit 18 rotates the rotating shaft 13 in order to control the inclination of the liquid supply plate 14 in addition to the operation and stop of the cooling device 15 and the liquid supply pump 17.

  The operation of the control unit 18 for making ice will be described. First, the control unit 18 operates the rotary shaft 13 to move the liquid supply plate 14 to a position where it adheres to the basket of the ice tray 12. Thereafter, the liquid supply pump 17 is operated to supply the magnesium hydride suspension in an amount that fills the recess 12a through the liquid supply hole 14a. After supplying the magnesium hydride suspension, the cooling device 15 is operated to produce the magnesium hydride suspension. In a freezer for home use, cooling is performed with a cooling capacity of about several kW to cool 10 pieces of ice of several centimeters. However, the cooling device 15 performs cooling more rapidly, for example, 10 kW for making the same amount of ice. It has the above ice making ability. After ice making of the magnesium hydride suspension, the liquid supply plate 14 is tilted to drop the ice. The control unit 18 determines whether or not ice making is to be further performed. If ice making is to be continued, each process of ice making is repeated again. If ice making is not to be continued, the process is terminated. By this process, the magnesium hydride suspension is iced.

  FIG. 3 is a schematic diagram showing a state in which the magnesium hydride suspension has been made into ice, FIG. 3A shows a state before ice making, and FIG. 3B shows a state after ice making. A hydrolysis reaction occurs when the magnesium hydride suspension is made, so that magnesium hydroxide molecules, dissolved hydrogen, and hydrogen bubbles are present in the ice.

DESCRIPTION OF SYMBOLS 1 Jet crusher 2 Feeder vibration feeder 3 Compressor 4 Air filter 5 Collecter 11 Container 12 Ice tray 12a Recess 13 Rotating shaft 14 Liquid supply plate 14a Liquid supply hole 15 Cooling device 16 Hose 17 Liquid supply pump 18 Control part

Claims (3)

A method for producing hydrogen-containing ice, comprising: ice-making a liquid produced by mixing granular magnesium hydride with water. 2. The method for producing hydrogen-containing ice according to claim 1, wherein an average particle diameter of the granular magnesium hydride is 0.1 μm or more and 20 μm or less. The method for producing hydrogen-containing ice according to claim 2, wherein the granular magnesium hydride has an average particle size of 0.1 µm or more and 5 µm or less.

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