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Composite catalyst for preparing iodic acid

A composite catalyst, iodic acid technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, iodine oxygen compound, etc., can solve the problem of slow reaction speed, long reaction time, low yield, etc. question

Active Publication Date: 2009-04-22
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above-mentioned methods, harmful gases can escape in the concentrated nitric acid oxidation method and the chloric acid oxidation method; the ozone oxidation method requires high equipment, and the yield is not high; some reaction speeds are too slow, and the reaction time is too long; If the hydrogen oxide is too high, the risk of explosion in production will increase; among them, only the hydrogen peroxide oxidation method has industrial reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Under the initial iodine amount of 3g, the amount of composite catalyst added (the mass ratio of potassium permanganate: hydroquinone is 1:1) is 0.03g, the amount of sulfuric acid is 1ml, the amount of water is 40ml and the amount of hydrogen peroxide is 20ml, placed in In a constant temperature water bath, stir the reaction with a magnetic stirrer, add 3g of iodine every half an hour, and add 10ml of hydrogen peroxide every 10min until the total amount of iodine is about 35g. The temperature starts from the initial 45°C and gradually increases to 50°C in the later stage. The consumption of hydrogen peroxide is 427ml. The amount of iodic acid solution prepared is 491g, the density is 1.09g / ml, the concentration of iodic acid is 9.8%, and the yield of iodine is 91.4%.

Embodiment 2

[0011] Under the condition that the initial iodine amount is 3g, the amount of composite catalyst added (the mass ratio of sodium molybdate:hydroquinone is 1:2) is 0.03g, the amount of sulfuric acid is 1ml, the amount of water is 50ml and the amount of hydrogen peroxide is 20ml, and placed at constant temperature In the water bath, stir the reaction with a magnetic stirrer, add 3g of iodine every half an hour, and add 10ml of hydrogen peroxide every 10min until the total amount of iodine is about 39g. The temperature starts from the initial 45°C and gradually increases to 50°C in the later stage. The consumption of hydrogen peroxide is 415ml. The amount of iodic acid solution prepared is 550g, the density is 1.10g / ml, the concentration of iodic acid is 10.4%, and the yield of iodine is 96.4%.

Embodiment 3

[0013] Under the initial iodine amount of 5g, the amount of composite catalyst added (sodium molybdate: the mass ratio of anthraquinone disulfonic acid is 1:3) is 0.06g, the amount of sulfuric acid is 2ml, the amount of water is 80ml and the amount of hydrogen peroxide is 20ml, placed in In a constant temperature water bath, stir the reaction with a magnetic stirrer, add 5g of iodine every half an hour, and add 10ml of hydrogen peroxide every 6 to 7 minutes until the total amount of iodine is about 60g. The temperature starts from the initial 45°C and gradually increases to 50°C in the later stage. Consumption of hydrogen peroxide is 815ml. The amount of iodic acid solution prepared is 1001g, the density is 1.08g / ml, the concentration of iodic acid is 8.8%, and the yield of iodine is 98.2%.

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PUM

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Abstract

The invention discloses a composite catalyst for preparing iodic acid. The composite catalyst consists of an inorganic compound and an organic compound; and the mass ratio of the inorganic compound to the organic compound is between 1 to 1 and 1 to 5. The inorganic compound is molybdate and hypermanganate; and the organic compound is dihydroxyhenzene or anthraquinone disulfonic acid. The use amount of the composite catalyst is 0.01 to 0.8 percent of the amount of fine iodine initially input. In the preparation of iodic acid through oxidizing iodine by hydrogen peroxide, the catalyst can shorten the reaction time and uses small amount.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a catalyst. Background technique [0002] Iodic acid, molecular formula: HIO 3 ;Molecular weight: 175.91. It is lustrous white crystal, or colorless or light yellow orthorhombic crystal, or crystalline powder, or colorless orthorhombic crystal. Its color becomes darker when exposed to light, and it does not absorb moisture. It is a strong acid and its concentrated solution is a strong oxidizing agent. Used as chemical reagents, oxidants, pharmaceuticals, organic synthesis. Used as a disinfectant. Industrially used for pharmaceutical synthesis, intermediates, catalysts, and chemical reagents. [0003] Currently, the reported preparation methods of iodic acid include chlorine oxidation, concentrated nitric acid oxidation, chloric acid oxidation, ozone oxidation, and hydrogen peroxide oxidation. Among the above-mentioned methods, harmful gases can escape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J23/32B01J23/24C01B11/22
Inventor 汤德元杨三可张翠微傅亚男刘辉李江华汤正河
Owner WENGFU (GRP) CO LTD