Method for preparing potassium iodide by using micro-channel reactor

A micro-channel reactor, potassium iodide technology, applied in the direction of alkali metal iodide, etc., can solve the problems of narrow product application field, harsh production conditions, and many three wastes, etc., achieves simple and easy preparation method, widened application field, Overcome unsafe effects

Active Publication Date: 2017-06-06
SHANGHAI WOKAI BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problems existing in the existing potassium iodide preparation process, such as harsh production conditions, high cost, excessive production of three wastes, and narrow product application f

Method used

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  • Method for preparing potassium iodide by using micro-channel reactor
  • Method for preparing potassium iodide by using micro-channel reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: utilize microchannel reactor to prepare potassium iodide.

[0034] (1) At room temperature, weigh 1422g of hydroiodic acid (wherein the content of hydrogen iodide is 57wt%) and 4.4g of formic acid, and mix them uniformly to obtain solution A.

[0035] (2) At room temperature, weigh 326g of potassium hydroxide and 414g of deionized water respectively, and mix them uniformly to obtain solution B (wherein the content of potassium hydroxide is 40wt%).

[0036] (3) Utilize feed pump to pump above-mentioned solution A and solution B respectively in the reactant storage tank A and the reactant storage tank B of liquid-liquid phase microchannel reactor, under 70 ℃ of reaction temperature, by controlling solution A and The respective flow velocity of solution B continuously makes the two mix according to the hydrogen iodide in solution A: the weight ratio of potassium hydroxide=2.16:1 in solution B in the reaction pipeline of liquid-liquid phase microchannel reacto...

Embodiment 2

[0038] Embodiment 2: utilize microchannel reactor to prepare potassium iodide.

[0039] (1) At room temperature, weigh 1400g of hydroiodic acid (wherein the content of hydrogen iodide is 58wt%) and 5.6g of formic acid, and mix the two uniformly to obtain solution A.

[0040] (2) At room temperature, weigh 380g of potassium hydroxide and 620g of distilled water respectively, and mix them uniformly to obtain solution B (wherein the content of potassium hydroxide is 38wt%).

[0041] (3) Utilize feed pump to pump above-mentioned solution A and solution B respectively in the reactant storage tank A and the reactant storage tank B of liquid-liquid phase microchannel reactor, under 95 ℃ of reaction conditions, by controlling solution A and The respective flow velocity of solution B continuously makes the two mix according to the hydrogen iodide in solution A: the weight ratio of potassium hydroxide=2.3:1 in solution B in the reaction pipeline of liquid-liquid phase microchannel react...

Embodiment 3

[0043] Embodiment 3: utilize microchannel reactor to prepare potassium iodide.

[0044] (1) At room temperature, weigh 1540g of hydroiodic acid (wherein the content of hydrogen iodide is 56wt%) and 3.9g of formic acid, and mix the two uniformly to obtain solution A.

[0045] (2) At room temperature, weigh 450g of potassium hydroxide and 550g of deionized water respectively, and mix them uniformly to obtain solution B (wherein the content of potassium hydroxide is 45wt%).

[0046] (3) Utilize feed pump to pump above-mentioned solution A and solution B respectively in the reactant storage tank A and the reactant storage tank B of the liquid-liquid phase microchannel reactor, under 85 ℃ of reaction conditions, by controlling solution A and The respective flow velocity of solution B continuously makes the two mix according to the hydrogen iodide in solution A: the weight ratio of potassium hydroxide=2.2:1 in solution B in the reaction pipeline of liquid-liquid phase microchannel r...

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Abstract

The invention belongs to the technical field of chemical reagent synthesis and relates to a method for preparing potassium iodide by using a micro-channel reactor. Specifically, the method comprises the following steps of (1) preparing a solution A by using hydroiodic acid and formic acid; (2) preparing a solution B by using potassium hydroxide and water; (3) reacting the two solutions in the micro-channel reactor; and (4) carrying out after-treatment. The method is mild in reaction condition, the high-quality potassium iodide can be efficiently and quantitatively prepared, and no waste gas or wastewater is generated in the whole preparation process; the disadvantages that a traditional technology is unsafe, toxic and multiple in three wastes in after-treatment are overcome; the potassium iodide prepared through the method is safe and reliable; various detection results can meet the requirements of related standards; the application field of a product is expanded; the preparation method is simple and feasible; and the possibility is provided for massive production.

Description

technical field [0001] The invention belongs to the technical field of chemical reagent synthesis, and relates to a method for preparing potassium iodide using a microchannel reactor. Background technique [0002] Potassium iodide is white cubic crystal or powder, which is slightly hygroscopic in humid air. After a long period of storage, it will turn yellow due to the precipitation of free iodine, and can form trace amounts of iodate, with a relative density of 3.12. The melting point is 680°C and the boiling point is 1330°C. [0003] Potassium iodide is often used as a steel pickling corrosion inhibitor or a synergist for other corrosion inhibitors, and is also a raw material for the preparation of iodides and dyes. In addition, potassium iodide is also used as a photographic photosensitive emulsifier, food additive, and in the medical field as an expectorant, diuretic, goiter prevention and treatment for hyperthyroidism, and has a wide range of uses. [0004] At present...

Claims

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Application Information

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IPC IPC(8): C01D3/12
CPCC01D3/12C01P2006/80
Inventor 薛循育宋忠哲王涛郑琦
Owner SHANGHAI WOKAI BIOTECH
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