One-step two-phase continuous production of trichloro-isocyanuric acid

A technology of trichloroisocyanuric acid and cyanuric acid, applied in the fields of botanical equipment and methods, chemicals for biological control, biocides, etc., can solve the problem of low sodium chloride content, complicated operation, long production process, etc. The problem is to achieve the effect of reducing acetone insoluble impurities, easy operation and control, and saving caustic soda and chlorine gas.

Active Publication Date: 2006-07-19
河北冀衡化学股份有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The two-step continuous chlorination method has the advantages of safer production, lower sodium chloride content in the product, and high quality; but the production process is longer, the equipment is more, and the intermediate product and the finished product are separated twice, and the operation is more cumbersome and the production environment Poor
[0005] The patent No. is U.S3,453,274 and U.S2,963,360 U.S. Patents disclose a kind of production method of chlorinated isocyanuric acid, this method adopts chlorine one-step method two-stage continuous formula chlorination synthesis trichloroisocyanuric acid, because The sodium cyanurate slurry liquid that adopts needs to be chlorinated, so the impurities insoluble in acetone are relatively high, and the appearance is relatively poor; the consumption of chlorine gas is relatively high, especially the second-stage chlorination system is chlorinated under slightly acidic conditions (pH2.4 ~3.8) chlorine absorption rate is low (68~85%), and this patent does not disclose the processing method of a large amount of chlorine tail gas; One stage chlorination selects pH5.0, and two stage chlorination selects pH2~4 to carry out chlorination reaction, still Nitrogen trichloride is produced as a side reaction product, and it is prone to explosion during the production process

Method used

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  • One-step two-phase continuous production of trichloro-isocyanuric acid
  • One-step two-phase continuous production of trichloro-isocyanuric acid

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Production of trichloroisocyanuric acid: (annual output of 3,000 tons of trichloroisocyanuric acid)

[0036] 1. Preparation of trisodium cyanurate solution:

[0037] In a 45 cubic meter stainless steel trisodium cyanurate dissolution reactor with stirring, thermometer, feeding port and jacket heat exchange, add 28565 kg of water, and add 3000.0 kg of cyanuric acid with fine powder content ≥ 98.5% under stirring, and stir to make It became a homogeneous slurry suspension. Under the condition of keeping the reaction temperature not higher than 35°C under stirring, slowly add 14689 kg of 20% liquid caustic soda within 6 to 6.5 hours. The speed of adding liquid caustic soda should be fast first and then slow. liters / hr, and the speed of adding liquid caustic soda in the middle is controlled at 1800 liters / hr; later, it is reduced to 800-820 liters / hr. After the addition of liquid caustic soda, keep the reaction at 36-38°C and stir to dissolve all the materials. After ...

Embodiment 2

[0074] (1) Production of trichloroisocyanuric acid (annual output of 5,000 tons of trichloroisocyanuric acid)

[0075] 1. Preparation of trisodium cyanurate solution:

[0076] In a 45 cubic meter stainless steel trisodium cyanurate dissolution reactor with stirring, thermometer, feeding port and jacket heat exchange, add 28008 kg of water, add 3000.0 kg of fine powder content ≥ 98.5% cyanuric acid under stirring, and stir to make It became a homogeneous slurry suspension. Put warm water into the jacket, keep the reaction temperature not higher than 35°C under stirring, slowly add 15595 kg of 20% caustic soda solution within 6 to 6.5 hours, the speed of adding liquid caustic soda should be fast at first and then slow. The speed of liquid caustic soda is about 3200 liters / hr, and the speed of adding liquid caustic soda in the middle is controlled at 1800 liters / hr; later it is reduced to 800-820 liters / hr. After adding the liquid caustic soda, keep the reaction temperature at ...

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Abstract

The disclosed one-step two-segment preparation method for trichloroiminocyanuric acid comprises: preparing the trisodium cyanurate; pressure filtering, absorbing and tail chlorine; taking the first/second-segment chlorination reaction; crystallizing, cleaning, and drying to obtain the product or co-generate sodium dichloroisocyanurate. This invention realizes cogeneration with high yield and low cost.

Description

technical field [0001] The invention belongs to the technical field of disinfectant and bactericide, and relates to a method for continuously producing trichloroisocyanuric acid in one step and two stages. Background technique [0002] Sodium dichloroisocyanurate and trichloroisocyanuric acid are both extremely strong disinfectants and chlorinating agents and oxidants in chemical production. Both products are high-efficiency, rapid, broad-spectrum, and low-toxicity disinfectants, which can effectively and quickly kill various bacteria, fungi, spores, and molds. The two products also have the functions of inactivating hepatitis A and hepatitis B surface antigens, algae killing, deodorizing, water purification and bleaching. This type of product is a non-toxic and safe disinfectant product popularized internationally. It is widely used in swimming pool disinfection, industrial water cycle treatment, food processing industry, food hygiene industry, aqua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/36A01N47/40A01P1/00
Inventor 柴如行韩伯睿徐可宸李俊娟李英刚刘荣新
Owner 河北冀衡化学股份有限公司
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