Method for producing bittern

Abstract

Provided is a method for producing an orally ingestible magnesium compound without heat generation. The method for producing bittern according to the present invention is characterized by bringing flame-retardant magnesium into contact with strongly acidic electrolyzed water generated by electrolysis of an aqueous sodium chloride solution.

Description

Method for producing bitter liquor

[0001] The present invention relates to a method for producing bitter liquor, which is an aqueous solution mainly composed of magnesium chloride.

[0002] A magnesium reduction furnace for reducing magnesium oxide to obtain a negative electrode material for a magnesium fuel cell is known (for example, see Patent Document 1).

[0003] The magnesium reduction furnace described in Patent Document 1 includes a storage unit for storing briquettes containing magnesium oxide and a reducing agent, and a recovery unit for depositing magnesium evaporated from the briquettes by cooling and recovering the deposited magnesium. It also includes a plurality of retorts each having these, a condensing unit for condensing sunlight onto the briquettes in one of the plurality of retorts, and a stage for driving the plurality of retorts in a state where they are placed so that the sunlight condensed by the condensing unit irradiates one of the plurality of retorts. When dolomite ore (CaMg(CO ３ ) ２ ) is used as magnesium oxide, it is said that flame-retardant magnesium with calcium added to magnesium can be obtained.

[0004] On the other hand, magnesium is one of the essential elements necessary for human life support and can be taken into the body by oral intake of magnesium compounds. As such an orally ingestible magnesium compound, for example, magnesium citrate is known. The magnesium citrate can be obtained, for example, by reacting magnesium with an aqueous solution of citric acid.

[0005] Japanese Patent Application Laid-Open No. 2017-20087

[0006] However, since the reaction between magnesium and an aqueous solution of citric acid is accompanied by heat generation, there is a disadvantage that handling may become difficult.

[0007] Therefore, an object of the present invention is to provide a method that eliminates such disadvantages and can produce an orally ingestible magnesium compound without heat generation.

[0008] The inventors of the present invention diligently studied methods for producing orally ingestible magnesium compounds and, as a result, discovered that by contacting the flame-retardant magnesium obtained when dolomite ore is used as magnesium oxide in the magnesium reduction furnace described in Patent Document 1 with strongly acidic electrolyzed water produced by the electrolysis of an aqueous sodium chloride solution, an orally ingestible magnesium compound, or bittern, can be obtained without generating heat, leading to the present invention.

[0009] Therefore, in order to achieve the above objective, the present invention's method for producing bittern is characterized by contacting flame-retardant magnesium with strongly acidic electrolyzed water produced by the electrolysis of an aqueous sodium chloride solution.

[0010] The electrolysis of the sodium chloride aqueous solution can be carried out by supplying the sodium chloride aqueous solution, prepared by adding sodium chloride to raw water, to an electrolysis apparatus equipped with an ion-permeable diaphragm between a pair of opposing electrodes. Through the electrolysis of the sodium chloride aqueous solution, chloride ions generated by the ionization of sodium chloride permeate the diaphragm and move to the anode-side electrolysis chamber, generating chlorine. This allows for the production of strongly acidic electrolyzed water containing chlorine in the anode-side electrolysis chamber.

[0011] According to the method for producing bittern of the present invention, by contacting the flame-retardant magnesium with the strongly acidic electrolyzed water containing chlorine, magnesium chloride is produced without generating heat, and thus bittern, which is an aqueous solution mainly composed of magnesium chloride, can be obtained.

[0012] A flowchart illustrating the method for producing bittern according to the present invention. A system configuration diagram showing an example of the apparatus configuration used for the electrolysis of an aqueous sodium chloride solution according to the present invention.

[0013] Next, embodiments of the present invention will be described in more detail with reference to the attached drawings.

[0014] As shown in Figure 1, the method for producing bittern in this embodiment first involves electrolyzing an aqueous sodium chloride solution in STEP 1 to obtain strongly acidic electrolyzed water in STEP 2. Next, flame-retardant magnesium in STEP 3 is brought into contact with the strongly acidic electrolyzed water in STEP 2, and a contact reaction occurs in STEP 4 to produce magnesium chloride, thereby obtaining bittern, which is an aqueous solution mainly composed of magnesium chloride.

[0015] The electrolysis in STEP 1 can be carried out, for example, by the electrolysis apparatus 1 shown in Figure 2. The electrolysis apparatus 1 includes an electrolytic cell 30 in which an anode electrode 53 and a cathode electrode 73 are arranged opposite each other. The electrolytic cell 30 is separated into an anode electrolysis chamber 51 containing the anode electrode 53 and a cathode electrolysis chamber 71 containing the cathode electrode 73 by an ion-permeable diaphragm 31 placed between the anode electrode 53 and the cathode electrode 73. The anode electrolysis chamber 51 is equipped with an acidic water outlet tube 55. For example, an ion exchange membrane can be used as the diaphragm 31.

[0016] Furthermore, the electrolysis apparatus 1 is equipped with a chloride aqueous solution storage tank 10, and the chloride aqueous solution storage tank 10 is connected to the anode electrolysis chamber 51 and the cathode electrolysis chamber 71 via a chloride aqueous solution supply pipe 33 equipped with a pump 35 in the middle.

[0017] In the electrolysis apparatus 1, an aqueous sodium chloride solution stored in the aqueous chloride solution storage tank 10 is introduced from the aqueous chloride solution supply pipe 33 into the anode electrolysis chamber 51 and the cathode electrolysis chamber 71, and electrolysis is performed by applying an electric current to the anode electrode 53 and the cathode electrode 73. The aqueous sodium chloride solution is prepared, for example, by adding sodium chloride to pure water to a final concentration of 2 to 5% by mass.

[0018] During the electrolysis of the sodium chloride aqueous solution, the sodium chloride contained in the aqueous solution introduced into the anode electrolysis chamber 51 and the cathode electrolysis chamber 71 dissociates into chloride ions and sodium ions, and the water dissociates into hydroxide ions and hydrogen ions. The chloride ions then permeate the membrane 31 and move to the anode electrolysis chamber 51 to produce chlorine, while the hydrogen ions permeate the membrane 31 and move to the cathode electrolysis chamber 71 to produce hydrogen. The sodium ions also permeate the membrane 31 and move to the cathode electrolysis chamber 71, where they react with hydroxide ions to produce sodium hydroxide.

[0019] The chlorine generated in the anodic electrolysis chamber 51 further generates strong acidic substances such as hypochlorous acid, and as a result, strongly acidic electrolyzed water with a pH of 1 to 2 containing chlorine is obtained in the anodic electrolysis chamber 51. The strongly acidic electrolyzed water is taken out of the anodic electrolysis chamber 51 by the acidic water outlet pipe 55 and subjected to a contact reaction with flame-retardant magnesium in STEP 4.

[0020] The flame-retardant magnesium in STEP 3 is a compound in which calcium is added to magnesium, and in the magnesium reduction furnace described in Patent Document 1, dolomite ore (CaMg(CO)) is used as magnesium oxide. ３ ) ２ This can be obtained by using the following. Specifically, the magnesium reduction furnace described in Patent Document 1 comprises a plurality of retorts, each having a containment section for containing briquettes containing magnesium oxide and a reducing agent, and a recovery section for recovering magnesium that has evaporated from the briquettes by cooling; a concentrating unit for concentrating sunlight onto the briquettes in one of the plurality of retorts; and a stage on which the plurality of retorts are placed, which is driven so that the sunlight concentrated by the concentrating unit irradiates one of the plurality of retorts. The flame-retardant magnesium contains, for example, calcium in an amount of 3.0% by mass of the total amount.

[0021] According to the method for producing bittern of this embodiment, by contacting the flame-retardant magnesium with the strongly acidic electrolyzed water in STEP 4, magnesium chloride is produced without generating heat, and bittern, which is an aqueous solution mainly composed of magnesium chloride, can be obtained.

[0022] 10... Chloride solution storage tank, 30... Electrolytic cell, 31... Diaphragm, 33... Chloride solution supply pipe, 35... Pump, 51... Anode electrolysis chamber, 53... Anode side electrode, 55... Acidic water outlet pipe, 71... Cathode electrolysis chamber, 73... Cathode side electrode.

Claims

1. A method for producing bittern, characterized by contacting flame-retardant magnesium with strongly acidic electrolyzed water produced by the electrolysis of an aqueous sodium chloride solution.

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