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Potassium iodate preparation method

A technology of potassium iodate and potassium iodide, applied in the direction of iodine oxygen compounds, can solve the problems of three wastes, high toxicity of chlorine gas, high energy consumption, etc., and achieve the effect of uniform product particles

Inactive Publication Date: 2018-05-29
SINOPHARM CHEM REAGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Potassium iodate prepared by the traditional potassium chlorate-iodine-nitric acid process has high energy consumption, is unsafe, has many wastes and is not suitable for Disadvantages of small batch (0.1-1000Kg) customization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of potassium iodate, comprising the following steps:

[0017] (1) get 498g potassium iodide and 12.8g hydroiodic acid and be dissolved in 1000g water under room temperature and make potassium iodide aqueous solution;

[0018] (2) take by weighing 1166g mass concentration and be 30% hydrogen peroxide, under room temperature, potassium iodide aqueous solution and hydrogen peroxide are added in the first reaction module and the second reaction module of microchannel reactor respectively according to the mass ratio of 1.29:1 with feed pump Mix the reaction, control the reaction residence time to be 30S, and obtain the first reaction liquid;

[0019] (3) take by weighing 58.3g mass concentration and be 30% hydrogen peroxide, the first reaction solution that obtains and the hydrogen peroxide that weighs are passed in the 3rd reaction module of microchannel reactor simultaneously according to the mass ratio of 46:1, control reaction stays The time is 15S ...

Embodiment 2

[0024] A preparation method of potassium iodate, comprising the following steps:

[0025] (1) get 678g potassium iodide and 17.8g hydroiodic acid and be dissolved in 1000g water under room temperature and make potassium iodide aqueous solution;

[0026] (2) take by weighing 1615g mass concentration and be 28% hydrogen peroxide, under room temperature, potassium iodide aqueous solution and hydrogen peroxide are added in the first reaction module and the second reaction module of microchannel reactor respectively according to the mass ratio of 1.05:1 with feed pump Mix the reaction, control the reaction residence time to be 30S, and obtain the first reaction solution;

[0027] (3) take by weighing 69g mass concentration and be 28% hydrogen peroxide, the first reaction liquid that obtains and the hydrogen peroxide that weighs are passed in the third reaction module of microchannel reactor simultaneously according to the mass ratio of 48:1, control reaction residence time is 15S ...

Embodiment 3

[0030] A preparation method of potassium iodate, comprising the following steps:

[0031] (1) get 434.8g potassium iodide and 10.9g hydroiodic acid and be dissolved in 1000g water under room temperature and make potassium iodide aqueous solution;

[0032] (2) take by weighing 1032.8g mass concentration and be 29% hydrogen peroxide, under room temperature, potassium iodide aqueous solution and hydrogen peroxide are 1.4:1 according to mass ratio and add respectively the first reaction module and the second reaction module of microchannel reactor with feed pump Medium mixed reaction, control reaction residence time is 30S, obtains the first reaction solution;

[0033] (3) take by weighing 63.6g mass concentration and be the hydrogen peroxide of 29%, the first reaction solution obtained and the hydrogen peroxide that weighs are passed in the third reaction module of microchannel reactor simultaneously according to the mass ratio of 39:1, control reaction stay The time is 15S to o...

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Abstract

The invention relates to a potassium iodate preparation method, which comprises: (1) dissolving potassium iodide containing a small amount of hydroiodic acid in water to prepare a potassium iodide aqueous solution with a mass concentration of 30-40%; (2) at a room temperature, respectively introducing the potassium iodide aqueous solution and 28-30 wt% hydrogen peroxide into the glass module of amicrochannel reactor by a feeding pump according to a mass ratio of (1.0-1.4):1, and carrying out a mixing reaction to obtain a first reaction liquid; (3) introducing the first reaction liquid and 28-30 wt% of hydrogen peroxide into the microchannel reactor according to a mass ratio of (39-48):1, and carrying out a reaction to obtain a second reaction liquid; and (4) collecting the second reactionliquid, heating to a temperature of 75-85 DEG C, filtering, carrying out cooling crystallization, carrying out thermal insulation at a temperature of 39-41 DEG C, adding crystal seed, crystallizing,cooling to a temperature of 4-6 DEG C, and carrying out thermal insulation to obtain the potassium iodate product. According to the present invention, the high-quality potassium iodate is quantitatively prepared by using the safe and environmentally-friendly reagents so as to achieve the high utilization rate of iodine.

Description

technical field [0001] The invention belongs to the technical field of chemical reagents, in particular to a preparation method of potassium iodate. Background technique [0002] Potassium iodate prepared by the traditional potassium chlorate-iodine-nitric acid process has high energy consumption, is unsafe, has many wastes and is not suitable for Disadvantages of small batch (0.1-1000Kg) customization. There is an urgent need for a preparation scheme suitable for high-quality, small-batch special potassium iodate to meet the production requirements of green chemistry. Contents of the invention [0003] The invention mainly provides a preparation method of potassium iodate, which adopts safe and green reagents to quantitatively prepare high-quality potassium iodate, so that the utilization rate of iodine is high. Its technical scheme is as follows: a kind of preparation method of potassium iodate, it is characterized in that: comprise the following steps: [0004] (1) d...

Claims

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Application Information

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IPC IPC(8): C01B11/22
CPCC01B11/22C01P2006/80
Inventor 郭建国陆惠懿凌芳柯德宏
Owner SINOPHARM CHEM REAGENT
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