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Preparation method of sodium bromite water solution

A technology of sodium bromite and aqueous solution, which is applied in the field of preparation of sodium bromite aqueous solution, which can solve the problems of product quality and safe transportation, unstable sodium bromite content, and product chloride ion exceeding the standard, and achieve product degradation rate The effects of slowing down and overcoming product instability and stable product quality

Active Publication Date: 2014-09-03
SHANDONG TIANXIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The biggest disadvantage of the sodium hypobromite method is that the yield is not high. In the process, only 14% of the bromine is converted into sodium bromite, and a large amount of bromine is converted into by-product sodium bromide. The value of sodium bromide is low, and it is difficult to obtain it from Separation in the solution increases the production cost, the sodium bromite content of the product is unstable, and the degradation speed is fast
It is easy to generate a large amount of degradation gas in the packaging barrel, which has a great impact on product quality and safe transportation.
[0005] The sodium hypochlorite method is the result of optimization based on the sodium hypobromite method. The presence of chlorine makes the utilization rate of bromine reach 35%. However, due to the introduction of chloride ions in this process, the follow-up treatment of the product has not changed, and the cost has increased. , the product chloride ion exceeds the standard, the product is similar to the sodium hypobromite process, the quality is unstable, and it is easy to degrade

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put 1000 kg of 15% sodium hydroxide aqueous solution into the reaction kettle, and under the condition of stirring, 100 kg of sodium bromite aqueous solution is pumped into the reaction kettle at a temperature of 10 ° C; then slowly add 100 kg of bromine dropwise, and the dropping time is 8 hours. After the dropwise addition, react for 2 hours under the conditions of stirring and temperature 10°C; stop stirring, let it stand for 6 hours, and the filtrate obtained by fine filtration is the sodium bromite aqueous solution product, and the sodium bromite content is determined to be 170g / L .

Embodiment 2

[0017] Put 1000kg of 15% sodium hydroxide solution into the reactor, and under the condition of stirring, at a temperature of 20°C, pump 200kg of sodium bromite aqueous solution into the reactor; then slowly add 1000kg of bromine dropwise for 9 hours. After the dropwise addition, react for 3 hours under the conditions of stirring and temperature 20°C; stop stirring, let it stand for 8 hours, and the filtrate obtained by fine filtration is the sodium bromite aqueous solution product, and the sodium bromite content is determined to be 250g / L .

Embodiment 3

[0019] Put 1000kg of 15% sodium hydroxide solution into the reaction kettle, and under the condition of stirring, at a temperature of 15°C, pump 150kg of sodium bromite aqueous solution into the reaction kettle; then slowly add 500kg of bromine dropwise, and the dropping time is 10 hours. After the dropwise addition is completed, react for 2.5 hours under the conditions of stirring and temperature 15°C; stop stirring, let it stand for 7 hours, and the filtrate obtained by fine filtration is the sodium bromite aqueous solution product, and the sodium bromite content is determined to be 210g / L .

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Abstract

The invention discloses a preparation method of sodium bromite water solution. The method comprises the following steps of: adding bromine to mixed solution of the sodium bromite water solution and 15% of sodium hydroxide water solution under the conditions of stirring and the temperature of 10-20 DEG C so as to prepare the sodium bromite water solution after the stirring reaction is complete, wherein the weight ratio of the sodium hydroxide water solution to the sodium bromite water solution is 1:0.1 to 1:0.2; and the weight ratio of the sodium hydroxide water solution to the bromine is 1:0.1 to 1:1. The preparation method is low in cost. A prepared product has high purity and good stability, the degradation velocity is low, a lot of degradation gas can not be formed in a pail pack, and the storage and the transportation are safe.

Description

technical field [0001] The present invention relates to a kind of preparation method of sodium bromite aqueous solution, specifically a kind of method utilizing bromine, sodium hydroxide and water to prepare sodium bromite aqueous solution. Background technique [0002] Sodium bromite aqueous solution is used as a desizing agent for cotton spinning in the textile industry. It has the advantages of fast desizing, no heat source, no damage to fabric fibers, good hand feeling, thorough and uniform desizing, etc.; printing and dyeing industry can replace sodium red alum for dye oxidation and color development , also used for bleaching; in the paper industry, it is used for the treatment of paper and pulp, which can increase the wear resistance of paper. [0003] The traditional production process of sodium bromite aqueous solution mainly includes the following types: (1) Sodium hypobromite method: Add water to solid alkali to make liquid alkali, add bromine at low temperature to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B11/00
Inventor 赵庭栋闫晓红魏军波刘杰单美青
Owner SHANDONG TIANXIN CHEM
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