Method for preparing halogen elementary substance by oxidizing halogen ions and generating power

Abstract

The invention belongs to the field of preparation of halogen simple substances, and particularly discloses a method for preparing halogen simple substances and generating power by oxidizing halogen ions, which comprises the following specific steps: S1, preparing a halide solution and a concentrated nitric acid solution; s2, adopting a halide solution as a negative electrode and concentrated nitric acid as a positive electrode, and respectively pouring the halide solution and the concentrated nitric acid into two ends of a reactor; s3, the halide solution and concentrated nitric acid are connected with wires respectively and then start to react; s4, in the negative electrode, halide ions are oxidized, electrons are lost, halogen simple substances are generated, in the positive electrode, nitrate ions are reduced, and electron-generated nitric oxide is obtained; s5, due to the oxidation-reduction reaction, electrons flow from the negative electrode to the positive electrode, and current is formed through the wire; s6, collecting the generated halogen simple substance by using a condenser; the halide solution and the concentrated nitric acid solution are used, the concentrated nitric acid is used for performing electrochemical oxidation on the halide solution to generate the halogen simple substance, and the technological process of halogen simple substance production is greatly simplified.

Description

Technical Field

[0001] The invention belongs to the field of preparing halogen elements, and in particular relates to a method for preparing halogen elements by oxidizing halogen ions and generating electricity. Background Art

[0002] Halogens refer to substances that exist in the form of a single element in nature. Halogen elements include chlorine, bromine, iodine, etc. Chlorine is widely used in water treatment and disinfection, and can effectively kill bacteria and viruses. Bromine is also used in water treatment, especially in swimming pools. Iodine is often used for disinfection and medical treatment, especially in skin disinfection before surgery. Halogens are key reactants in many chemical reactions, especially in organic chemistry, used to synthesize compounds such as halogenated hydrocarbons. Some halogen compounds are used to make photosensitive materials and are widely used in the photography and printing industries. Halogen compounds are also used in the manufacture of semiconductors and electronic products, with a wide range of applications.

[0003] Halides refer to compounds formed by the combination of halogen elements (fluorine, chlorine, bromine, iodine, astatine) with other elements (usually metals or hydrogen). Halides can be ionic compounds or covalent compounds, including chlorides: such as sodium chloride, calcium chloride; bromides: such as sodium bromide, magnesium bromide; iodides: such as sodium iodide, calcium iodide;

[0004] However, the traditional production process of chlorine, bromine and iodine is relatively complicated, the production efficiency is not ideal, and certain pollutants are generated, the cost is high, and it is not conducive to use. Summary of the invention

[0005] The object of the present invention is to provide a method for oxidizing halogen ions to prepare halogen elements and generate electricity, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for oxidizing halogen ions to prepare halogen elements and generate electricity, the specific steps are as follows:

[0008] S1: prepare halide solution and concentrated nitric acid solution;

[0009] S2: Using halide solution as the negative electrode and concentrated nitric acid as the positive electrode, the halide solution and concentrated nitric acid are poured into both ends of the reactor respectively;

[0010] S3: The halide solution and concentrated nitric acid are connected to wires and react with each other;

[0011] S4: In the negative electrode, the halide ions are oxidized and lose electrons to generate halogen elements. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0012] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0013] S6: Use a condenser to collect the generated halogen element.

[0014] Preferably, the halide solution is a sodium bromide solution, and the specific steps for preparing bromine element are as follows:

[0015] S1: prepare sodium bromide solution and concentrated nitric acid solution;

[0016] S2: Using sodium bromide solution as the negative electrode and concentrated nitric acid as the positive electrode, pour the sodium bromide solution and concentrated nitric acid into both ends of the reactor respectively;

[0017] S3: Sodium bromide solution and concentrated nitric acid are connected to wires and react with each other;

[0018] S4: In the negative electrode, bromide ions are oxidized and lose electrons to generate bromine. In the anode, nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0019] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0020] S6: Use a condenser to collect the generated bromine element.

[0021] Preferably, the ionic equation for preparing bromine is as follows:

[0022] 2NaBr+4HNO3→2KaNO3+2H2O+2NO2+Br2.

[0023] Preferably, the halide solution is a sodium chloride solution, and the specific steps for preparing chlorine are as follows:

[0024] S1: prepare sodium chloride solution and concentrated nitric acid solution;

[0025] S2: Use sodium chloride solution as the negative electrode and concentrated nitric acid as the positive electrode, and pour the sodium chloride solution and concentrated nitric acid into both ends of the reactor respectively;

[0026] S3: Sodium chloride solution and concentrated nitric acid are connected to wires and react with each other;

[0027] S4: In the negative electrode, chloride ions are oxidized and lose electrons to generate chlorine. In the anode, nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0028] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0029] S6: Use a condenser to collect the generated chlorine element.

[0030] Preferably, the ionic equation for preparing chlorine is as follows:

[0031] 2NaCI+4HNO3→2KaNO3+2H2O+2NO2+CI2.

[0032] Preferably, the halide solution is a sodium iodide solution, and the specific steps for preparing elemental iodine are as follows:

[0033] S1: prepare sodium iodide solution and concentrated nitric acid solution;

[0034] S2: Using sodium iodide solution as the negative electrode and concentrated nitric acid as the positive electrode, pour the sodium iodide solution and concentrated nitric acid into both ends of the reactor respectively;

[0035] S3: Sodium iodide solution and concentrated nitric acid are connected to wires and react with each other;

[0036] S4: In the negative electrode, the iodide ions are oxidized and lose electrons to generate chlorine. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0037] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0038] S6: Use a condenser to collect the generated iodine element.

[0039] Preferably, the ionic equation for preparing elemental iodine is as follows:

[0040] 2NaI+4HNO3→2NaNO3+2H2O+2NO2+I2.

[0041] Preferably, the ratio of the halide solution is 0.01-3 mol / L, and the concentration of the concentrated nitric acid is above 30%.

[0042] Preferably, the voltage at which the redox reaction generates an electric current through the wire is above 0.3 volts.

[0043] Preferably, the oxidation reaction between the halide solution and concentrated nitric acid will generate nitrates, which can be regenerated into nitric acid by reacting the nitrates with sulfuric acid, and the nitrogen oxides generated by the reaction of concentrated nitric acid can be regenerated into nitric acid by reacting with water and air, which can be recycled.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention uses a halide solution and a concentrated nitric acid solution, halogen ions are oxidized to generate halogen elements, and concentrated nitric acid is reduced to nitrogen oxides. The halide solution is electrochemically oxidized by concentrated nitric acid to generate halogen elements, which greatly simplifies the process flow of halogen element production.

[0046] The present invention uses a halide solution as a negative electrode and concentrated nitric acid as a positive electrode, and uses wires to connect to form a primary battery. When the halogen ions are oxidized to generate halogen elements, they lose electrons, and when the nitrate ions are reduced, they gain electrons. The electrons flow from the negative electrode to the positive electrode, and due to the potential difference between the electrodes, a current of more than 0.3 volts is generated through the wires to achieve power generation.

[0047] According to the present invention, sodium nitrate is generated by the reaction of a halide solution with concentrated nitric acid, and the sodium nitrate can be separated by evaporation and crystallization, and the nitrogen oxides generated by the reduction reaction of concentrated nitric acid can be absorbed and converted into nitrates by an alkaline solution absorption method, and nitric acid can be generated by the reaction of the obtained nitrates with sulfuric acid. The generated nitric acid can be recycled and used in the next reaction, thereby reducing environmental pollution and reducing reaction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0049] Figure 1 A flowchart of the method steps of the present invention;

[0050] Figure 2 This is a flowchart of the specific steps for preparing bromine element of the present invention;

[0051] Figure 3 This is a block diagram of the specific steps for preparing chlorine element of the present invention;

[0052] Figure 4 The figure is a flowchart of the specific steps of preparing iodine element according to the present invention. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0054] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0055] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0056] As attached Figure 1 To Attachment Figure 4 As shown:

[0057] Embodiment 1: This embodiment provides a method for oxidizing halogen ions to produce halogen elements and generate electricity, and the specific steps are as follows:

[0058] S1: prepare halide solution and concentrated nitric acid solution;

[0059] S2: Using halide solution as the negative electrode and concentrated nitric acid as the positive electrode, the halide solution and concentrated nitric acid are poured into both ends of the reactor respectively;

[0060] S3: The halide solution and concentrated nitric acid are connected to wires and react with each other;

[0061] S4: In the negative electrode, the halide ions are oxidized and lose electrons to generate halogen elements. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0062] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0063] S6: Use a condenser to collect the generated halogen element.

[0064] Specifically, the halide solution is a sodium bromide solution, and the specific steps for preparing bromine element are as follows:

[0065] S1: prepare sodium bromide solution and concentrated nitric acid solution;

[0066] S2: Using sodium bromide solution as the negative electrode and concentrated nitric acid as the positive electrode, pour the sodium bromide solution and concentrated nitric acid into both ends of the reactor respectively;

[0067] S3: Sodium bromide solution and concentrated nitric acid are connected to wires and react with each other;

[0068] S4: In the negative electrode, bromide ions are oxidized and lose electrons to generate bromine. In the anode, nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0069] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0070] S6: Use a condenser to collect the generated bromine element.

[0071] Specifically, the ionic equation for preparing bromine is as follows:

[0072] 2NaBr+4HNO3→2KaNO3+2H2O+2NO2+Br2.

[0073] Specifically, the ratio of the halide solution is 0.01-3 mol / L, and the concentration of the concentrated nitric acid is above 30%.

[0074] Specifically, the voltage at which the redox reaction generates an electric current through the wire is above 0.3 volts.

[0075] Specifically, the oxidation reaction between the halide solution and concentrated nitric acid will generate nitrate, which can be regenerated into nitric acid by reacting with sulfuric acid. The nitrogen oxides generated by the reaction of concentrated nitric acid can be regenerated into nitric acid by reacting with water and air, and can be recycled.

[0076] As can be seen from the above, during the reaction, bromide ions will be oxidized to generate bromine elemental substance, and concentrated nitric acid will be reduced to nitrogen oxides. At the same time, bromide ions will lose electrons when being oxidized to generate bromine elemental substance, and nitrate ions will gain electrons when being reduced. Sodium bromide solution and concentrated nitric acid are connected by wires to form a primary battery. Electrons flow from the negative electrode to the positive electrode, and due to the potential difference between the electrodes, a current of more than 0.3 volts will be generated through the wires to achieve power generation. The sodium bromide solution is chemically oxidized by concentrated nitric acid to generate bromine elemental substance, which greatly simplifies the process flow of bromine production. Sodium bromide solution will generate sodium nitrate when reacting with concentrated nitric acid, which can be separated by evaporation and crystallization. Nitrogen oxides generated by the reduction reaction of concentrated nitric acid can be absorbed and converted into nitrates by alkali solution absorption method. Nitric acid can be generated by reacting the obtained nitrates with sulfuric acid. The generated nitric acid can be recycled for the next reaction, reducing environmental pollution and reducing reaction costs.

[0077] Embodiment 2: This embodiment provides a method for oxidizing halogen ions to produce halogen elements and generate electricity, and the specific steps are as follows:

[0078] S1: prepare halide solution and concentrated nitric acid solution;

[0079] S2: Using halide solution as the negative electrode and concentrated nitric acid as the positive electrode, the halide solution and concentrated nitric acid are poured into both ends of the reactor respectively;

[0080] S3: The halide solution and concentrated nitric acid are connected to wires and react with each other;

[0081] S4: In the negative electrode, the halide ions are oxidized and lose electrons to generate halogen elements. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0082] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0083] S6: Use a condenser to collect the generated halogen element.

[0084] Specifically, the halide solution is a sodium chloride solution, and the specific steps for preparing chlorine element are as follows:

[0085] S1: prepare sodium chloride solution and concentrated nitric acid solution;

[0086] S2: Use sodium chloride solution as the negative electrode and concentrated nitric acid as the positive electrode, and pour the sodium chloride solution and concentrated nitric acid into both ends of the reactor respectively;

[0087] S3: Sodium chloride solution and concentrated nitric acid are connected to wires and react with each other;

[0088] S4: In the negative electrode, chloride ions are oxidized and lose electrons to generate chlorine. In the anode, nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0089] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0090] S6: Use a condenser to collect the generated chlorine element.

[0091] Specifically, the ionic equation for preparing chlorine is as follows:

[0092] 2NaCI+4HNO3→2KaNO3+2H2O+2NO2+CI2.

[0093] Specifically, the ratio of the halide solution is 0.01-3 mol / L, and the concentration of the concentrated nitric acid is above 30%.

[0094] Specifically, the voltage at which the redox reaction generates an electric current through the wire is above 0.3 volts.

[0095] Specifically, the oxidation reaction between the halide solution and concentrated nitric acid will generate nitrate, which can be regenerated into nitric acid by reacting with sulfuric acid. The nitrogen oxides generated by the reaction of concentrated nitric acid can be regenerated into nitric acid by reacting with water and air, and can be recycled.

[0096] As can be seen from the above, during the reaction, chloride ions will be oxidized to generate chlorine element, and concentrated nitric acid will be reduced to nitrogen oxides. At the same time, chloride ions will lose electrons when they are oxidized to generate chlorine element, and nitrate ions will gain electrons when they are reduced. Sodium chloride solution and concentrated nitric acid are connected by wires to form a primary battery. Electrons flow from the negative electrode to the positive electrode, and due to the potential difference between the electrodes, a current of more than 0.3 volts will be generated through the wires to achieve power generation. The sodium chloride solution is chemically oxidized by concentrated nitric acid to generate chlorine element, which greatly simplifies the process flow of chlorine production. Sodium nitrate will be generated when sodium chloride solution reacts with concentrated nitric acid, which can be separated by evaporation and crystallization. Nitrogen oxides generated by the reduction reaction of concentrated nitric acid can be absorbed and converted into nitrates by alkali solution absorption method. Nitric acid can be generated by reacting the obtained nitrate with sulfuric acid. The generated nitric acid can be recycled for the next reaction, reducing environmental pollution and reducing reaction costs.

[0097] Embodiment 3: This embodiment provides a method for oxidizing halogen ions to produce halogen elements and generate electricity, and the specific steps are as follows:

[0098] S1: prepare halide solution and concentrated nitric acid solution;

[0099] S2: Using halide solution as the negative electrode and concentrated nitric acid as the positive electrode, the halide solution and concentrated nitric acid are poured into both ends of the reactor respectively;

[0100] S3: The halide solution and concentrated nitric acid are connected to wires and react with each other;

[0101] S4: In the negative electrode, the halide ions are oxidized and lose electrons to generate halogen elements. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0102] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0103] S6: Use a condenser to collect the generated halogen element.

[0104] Specifically, the halide solution is a sodium iodide solution, and the specific steps for preparing elemental iodine are as follows:

[0105] S1: prepare sodium iodide solution and concentrated nitric acid solution;

[0106] S2: Using sodium iodide solution as the negative electrode and concentrated nitric acid as the positive electrode, pour the sodium iodide solution and concentrated nitric acid into both ends of the reactor respectively;

[0107] S3: Sodium iodide solution and concentrated nitric acid are connected to wires and react with each other;

[0108] S4: In the negative electrode, the iodide ions are oxidized and lose electrons to generate chlorine. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides.

[0109] S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire;

[0110] S6: Use a condenser to collect the generated iodine element.

[0111] Specifically, the ionic equation for preparing iodine is as follows:

[0112] 2NaI+4HNO3→2NaNO3+2H2O+2NO2+I2.

[0113] Specifically, the ratio of the halide solution is 0.01-3 mol / L, and the concentration of the concentrated nitric acid is above 30%.

[0114] Specifically, the voltage at which the redox reaction generates an electric current through the wire is above 0.3 volts.

[0115] Specifically, the oxidation reaction between the halide solution and concentrated nitric acid will generate nitrate, which can be regenerated into nitric acid by reacting with sulfuric acid. The nitrogen oxides generated by the reaction of concentrated nitric acid can be regenerated into nitric acid by reacting with water and air, and can be recycled.

[0116] As can be seen from the above, during the reaction, iodide ions will be oxidized to generate iodine element, and concentrated nitric acid will be reduced to nitrogen oxides. At the same time, iodide ions will lose electrons when they are oxidized to generate iodine element, and nitrate ions will gain electrons when they are reduced. Sodium iodide solution and concentrated nitric acid are connected by wires to form a primary battery. Electrons flow from the negative electrode to the positive electrode, and due to the potential difference between the electrodes, a current of more than 0.3 volts will be generated through the wires to achieve power generation. The sodium iodide solution is chemically oxidized by concentrated nitric acid to generate iodine element, which greatly simplifies the process flow of iodine production. Sodium nitrate will be generated when the sodium iodide solution reacts with concentrated nitric acid, which can be separated by evaporation and crystallization. Nitrogen oxides generated by the reduction reaction of concentrated nitric acid can be absorbed and converted into nitrates by alkali solution absorption method. Nitric acid can be generated by reacting the obtained nitrate with sulfuric acid. The generated nitric acid can be recycled for the next reaction, reducing environmental pollution and reducing reaction costs.

[0117] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0118] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0119] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0120] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for producing halogen by oxidizing halogen ions and generating electricity, characterized in that: The specific steps are as follows: S1: preparing halide solution and concentrated nitric acid solution; S2: Using halide solution as the negative electrode and concentrated nitric acid as the positive electrode, the halide solution and concentrated nitric acid are poured into both ends of the reactor respectively; S3: The halide solution and concentrated nitric acid are connected to wires and react with each other; S4: In the negative electrode, the halide ions are oxidized and lose electrons to generate halogen elements. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides. S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire; S6: Use a condenser to collect the generated halogen element.

2. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 1, characterized in that: The halide solution is a sodium bromide solution, and the specific steps for preparing bromine element are as follows: S1: prepare sodium bromide solution and concentrated nitric acid solution; S2: Using sodium bromide solution as the negative electrode and concentrated nitric acid as the positive electrode, pour the sodium bromide solution and concentrated nitric acid into both ends of the reactor respectively; S3: Sodium bromide solution and concentrated nitric acid are connected to wires and react with each other; S4: In the negative electrode, bromide ions are oxidized and lose electrons to generate bromine. In the anode, nitrate ions are reduced and gain electrons to generate nitrogen oxides. S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire; S6: Use a condenser to collect the generated bromine element.

3. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 2, characterized in that: The ionic equation for preparing bromine is as follows: 2NaBr+4HNO3→2KaNO3+2H2O+2NO2+Br2.

4. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 1, characterized in that: The halide solution is a sodium chloride solution, and the specific steps for preparing chlorine element are as follows: S1: prepare sodium chloride solution and concentrated nitric acid solution; S2: Use sodium chloride solution as the negative electrode and concentrated nitric acid as the positive electrode, and pour the sodium chloride solution and concentrated nitric acid into both ends of the reactor respectively; S3: Sodium chloride solution and concentrated nitric acid are connected to wires and react with each other; S4: In the negative electrode, chloride ions are oxidized and lose electrons to generate chlorine. In the anode, nitrate ions are reduced and gain electrons to generate nitrogen oxides. S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire; S6: Use a condenser to collect the generated chlorine element.

5. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 4, characterized in that: The ionic equation for preparing chlorine is as follows: 2NaCI+4HNO3→2KaNO3+2H2O+2NO2+CI2.

6. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 1, characterized in that: The halide solution is a sodium iodide solution, and the specific steps for preparing elemental iodine are as follows: S1: prepare sodium iodide solution and concentrated nitric acid solution; S2: Using sodium iodide solution as the negative electrode and concentrated nitric acid as the positive electrode, pour the sodium iodide solution and concentrated nitric acid into both ends of the reactor respectively; S3: Sodium iodide solution and concentrated nitric acid are connected to wires and react with each other; S4: In the negative electrode, the iodide ions are oxidized and lose electrons to generate chlorine. In the anode, the nitrate ions are reduced and gain electrons to generate nitrogen oxides. S5: Due to the redox reaction, electrons flow from the negative electrode to the positive electrode, forming an electric current through the wire; S6: Use a condenser to collect the generated iodine element.

7. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 6, characterized in that: The ionic equation for preparing iodine is as follows: 2NaI+4HNO3→2NaNO3+2H2O+2NO2+I2.

8. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 1, characterized in that: The ratio of the halide solution is 0.01-3 mol / L, and the concentration of the concentrated nitric acid is above 30%.

9. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 1, characterized in that: The voltage at which the redox reaction generates an electric current through the wire is above 0.3 volts.

10. The method for preparing halogen element and generating electricity by oxidizing halogen ions according to claim 1, characterized in that: The oxidation reaction between the halide solution and concentrated nitric acid will generate nitrate, which can be regenerated into nitric acid by reacting with sulfuric acid. The nitrogen oxides generated by the reaction of concentrated nitric acid can be regenerated into nitric acid by reacting with water and air, and can be recycled.

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