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Production method of sodium bromide, sodium bromate, potassium bromide and potassium bromate by using bromide and alkali

A technology of sodium bromate and sodium bromide, which is applied in the direction of alkali metal bromide and oxybromide, can solve the problems of irritating the respiratory tract, large urea, volatilization, etc., and achieve the effect of environmental protection

Inactive Publication Date: 2002-06-19
周群领
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Problems solved by technology

However, all processes do not remove free bromine, so that free bromine volatilizes into the air to pollute the environment and stimulate human respiratory tract
In addition, in the urea reduction method, a large amount of urea is used, and hydrobromic acid is used to remove impurities at 80°C, and the acid and bromine will volatilize into the atmosphere and pollute the environment.

Method used

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  • Production method of sodium bromide, sodium bromate, potassium bromide and potassium bromate by using bromide and alkali
  • Production method of sodium bromide, sodium bromate, potassium bromide and potassium bromate by using bromide and alkali

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Embodiment Construction

[0051] Bromine and 32% sodium hydroxide are used as raw materials, and the weight ratio is 0.932: 1.456 (ton).

[0052]Put 32% sodium hydroxide solution in the reaction tank, and then slowly introduce bromine, the amount of bromine is relatively large at the beginning, then decreases, and when the end of the reaction is approaching, the flow rate is smaller, and the reaction temperature is controlled at about 80°C , When the pH value is 6-7, the reaction is terminated and bromine is stopped. The specific gravity of the solution is adjusted to about 1.55, and the reaction formula is as follows:

[0053]

[0054] Add sodium hydroxide solution to control the pH value of the reaction solution to about 10, add about 10 kg of hydrogen peroxide (hydrogen peroxide is slightly excessive) while stirring, remove free bromine until the solution turns from light red to colorless, and adjust the pH value to 6-7 , which reacts as follows:

[0055]

[0056]

[0057] Pou...

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Abstract

The present invention uses bromide and sodium (potassium) hydroxide as raw material, makes them produce disproportionation reaction, regulates specific weight and pH value, uses hydrogen peroxide to remove free bromine, and adopts the processes of cooling and dewatering to separate sodium (potassium) bromate crude product, and makes the mother liquor undergo the processes of dewatering and concentration to obtain sodium (potassium) bromide crude product. The sodium (potassium) bromide crude product is disclosed, and undergone dthe processes of removing small quantity of sodium (potassium) bromate by using urea, filtering, dewatering, concentrating, drying and packaging to obtain sodium (potassium) bromide finished product. The sodium (potassium) bromate crude product is undergone the processes of dissolving, filtering, dewatering, concentrating, drying and packaging so as to obtain sodium (potassium) bromate finished product.

Description

technical field [0001] The invention relates to a technique for producing sodium bromide and sodium bromate with bromine and sodium hydroxide and producing potassium bromide and potassium bromate with bromine and potassium hydroxide, belonging to the field of bromide and oxybromide in inorganic chemistry. Background technique [0002] Sodium bromide is used to make photosensitive film, and it is used as a diuretic and a sedative in medicine, and it can strengthen the inhibitory process of the cerebral cortex. It is used as a brominating agent in industries such as synthetic spices, medicines and dyes. Also used as a chemical reagent. [0003] Potassium bromide is used as a nerve sedative in medicine, used in photography to make silver bromide paper, also used in engraving and lithography, making special soap, as analytical reagent, spectroscopic and infrared transmission. [0004] Sodium bromate is used as printing and dyeing auxiliaries, perm agents for daily chemicals; i...

Claims

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Application Information

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IPC IPC(8): C01B11/20C01D3/10
Inventor 周群领
Owner 周群领
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