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A kind of green production technology of iodate

A technology of green production and iodate, which is applied in the field of green production technology of iodate, and can solve problems such as environmental pollution, environmental pollution, safety accidents, etc.

Active Publication Date: 2022-06-17
TAIAN HAVAY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] A main disadvantage of direct electrolytic synthesis of potassium iodate is: due to the low solubility of potassium iodate in water, the electrolysis process will increase with the concentration of iodate generated, and the iodate will precipitate and crystallize with potassium ions, and adhere to the plate or membrane, resulting in Increased energy consumption, damage to equipment, and short-circuit of plate crystallization can also cause safety accidents. Therefore, it is difficult to achieve industrial production by direct electrolytic synthesis of potassium iodate
[0012] Potassium iodate is produced by direct oxidation of potassium chlorate, which produces chlorine gas during the reaction, pollutes the environment, and contains a large number of side reaction products in the product, which is difficult to separate and high in cost
[0013] Similarly, if chemical synthesis is used to produce other iodates, the synthesis process will also produce chlorine gas like the synthesis of potassium iodate. Once leaked, it will cause environmental pollution and safety accidents, and the reaction process of dangerous chlorate and nitric acid will produce carbon dioxide. The possibility of chlorine, chlorine dioxide is extremely unstable, and it is easy to cause explosion accidents, so it is difficult to achieve large-scale and continuous production by chemical synthesis
Simultaneous oxidation synthesis of iodate will produce a large amount of by-product chloride, which not only affects product quality, but also pollutes the environment

Method used

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  • A kind of green production technology of iodate
  • A kind of green production technology of iodate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of potassium iodate:

[0043]Add 3600mL of deionized water to the 5000mL reaction kettle, put in 632g of lithium hydroxide (≥56.5%), 1910g of iodine, and 12.08g of potassium dichromate, take samples to detect the concentration and pH of lithium ions and potassium dichromate, and add an appropriate amount according to the test results. Water, lithium hydroxide, iodine, potassium dichromate, adjust the final lithium ion mass concentration to 1.7%, add potassium dichromate to adjust the potassium dichromate mass concentration to 0.2%, adjust the pH to 10.1, configure 3 batches of electrolysis according to this ratio The liquid is transferred to the electrolyte storage tank for backup.

[0044] The configured electrolyte part is put into the electrolysis device, the temperature is raised to 80°C, the cycle is turned on, the voltage is set to 3.8V, and the electrolysis is carried out until the mass concentration of iodate is 18%. The electrolysis completion liqu...

Embodiment 2

[0050] The preparation of potassium iodate (mother liquor is applied mechanically):

[0051] Get 4000mL of metathesis mother liquor obtained in embodiment 1, detect lithium ion, potassium ion, potassium dichromate concentration, pH value, add appropriate amount of water, lithium hydroxide and iodine fine-tuning according to the detection result, make the lithium ion mass concentration in the solution be 0.8 %, potassium ion mass concentration ≤ 1.3%, potassium dichromate mass concentration 0.2%, adjust PH to 9.6, configure 3 batches and transfer to electrolyte storage tank for standby.

[0052] Continuously add the above electrolyte in the 18% iodate-containing electrolysis circulation system stabilized in Example 1, control the electrolysis cathode and anode voltage 3.8V, and continuously extract the electrolysis completion solution from the discharge port, through the electrolyte feed valve, The flow rate was adjusted, the mass concentration of iodate in the extracted electr...

Embodiment 3

[0058] Preparation of sodium iodate:

[0059] Add 3600mL of deionized water to the 5000mL reaction kettle, put in lithium hydroxide and iodine, adjust the lithium ion mass concentration to 1.7%, add sodium dichromate to adjust the sodium dichromate mass concentration to 0.15%, adjust the pH to 10.6, according to this ratio Configure 4 batches of electrolyte and transfer it to the electrolyte storage tank for backup.

[0060] The configured electrolyte part is put into the electrolysis device, the temperature is raised to 80°C, the cycle is turned on, the voltage is set to 3.7V, and electrolyzed to 16% of the iodate mass concentration, and the electrolyte is continuously added to the electrolysis device, and continuously collected from the discharge port. The finished electrolysis solution is discharged, the flow rate is adjusted through the electrolyte feeding valve, the mass concentration of iodate in the extracted electrolysis finished solution is controlled to be 16%, and t...

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Abstract

The invention belongs to the field of electrochemical synthesis, and specifically relates to a green production process of iodate. The process prepares lithium iodate by electrolysis, then reacts the prepared lithium iodate with iodide to prepare iodate, and circulates the mother liquor Utilization, no effluent waste is produced, the product yield is high, and the generation of a large amount of waste salt is avoided, which is green and environmentally friendly. Preparation of lithium iodate by electrolysis The clean electrolysis process does not need to add oxidants and other additional raw and auxiliary materials like the chemical method. The raw and auxiliary materials are simple and the quality of the iodate produced is high.

Description

technical field [0001] The invention belongs to the technical field of electrochemical synthesis, and in particular relates to a green production process of iodate. [0002] technical background [0003] Iodates are widely used in chemical synthesis, chemical analysis, pesticides, medicine, and materials industries; some iodates can be used as additives in the food and feed industries. [0004] Taking potassium iodate as an example, it is used as a precipitant and a standard reagent in chemical analysis; as a feed additive in agriculture; as an iodine or medicament for the prevention and treatment of endemic goiter disease in medicine, and can also be used in organic synthesis; used in the food industry as An additive for the trace element iodine. The existing potassium iodate synthesis methods mainly include direct electrolysis of potassium iodide to synthesize potassium iodate and potassium chlorate oxidation method. [0005] The method of directly electrolyzing potassium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/14C01B11/22
CPCC25B1/14C01B11/22C25B1/24C25B15/081
Inventor 孙桂彬王加旺李贺存任淑振
Owner TAIAN HAVAY CHEM
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