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A kind of two-stage continuous chlorination method for producing trichloroisocyanuric acid

A technology of trichloroisocyanuric acid and trichloroisocyanuric acid slurry, which is applied in the field of two-stage continuous chlorination to produce trichloroisocyanuric acid, can solve the problems of increasing the tail gas of the primary reactor for alkali washing and absorption, poor chlorine gas absorption efficiency, and sodium hypochlorite Problems such as large output, to achieve the effects of short residence time, improved production efficiency, and high level of automatic control

Active Publication Date: 2016-07-06
南宁中天科技工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this patent is that the primary reactor adopts spray absorption, and the absorption efficiency of chlorine gas is poor, and it is necessary to increase the tail gas of the primary reactor for alkali washing absorption
The production process of this patented technology is relatively long, and the output of by-product sodium hypochlorite is large

Method used

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  • A kind of two-stage continuous chlorination method for producing trichloroisocyanuric acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: produce the production of 2000 tons of trichloroisocyanuric acid per year

[0028] 1. Primary chlorination reaction

[0029] The trisodium solution with a concentration of 10.0% trisodium cyanurate is cooled to 13±2°C through a heat exchanger, and the temperature is 2.3m 3 The flow rate of / h continuously enters the primary reactor. The primary reaction kettle is a ￠1000×2000 conical bottom PVC container with an effective volume of about 1.0m 3 . The material in the primary reactor is pumped and circulated, and the vacuum is generated by the jet pump, and the chlorine gas in the secondary reactor is sucked into the jet pump, and the chlorine gas and the trisodium solution are contacted and reacted in the jet pump to generate chloroisocyanuric acid Salt. Adjust the chlorine flow rate of the secondary reactor to control the temperature of the primary reactor at 23±2°C. The residence time of the materials in the primary reactor is controlled between 0....

Embodiment 2

[0035] Embodiment two: produce the production of 3000 tons of trichloroisocyanuric acid per year

[0036] 1. Primary chlorination reaction

[0037] The trisodium solution with a concentration of 8.0% trisodium cyanurate is cooled to 5±2°C through a heat exchanger, and the temperature is 4.2m 3 The flow rate of / h continuously enters the primary reactor. The primary reaction kettle is a ￠1000×2000 conical bottom PVC container with an effective volume of about 1.0m 3 . The material in the primary reactor is pumped and circulated, and the vacuum is generated by the jet pump, and the chlorine gas in the secondary reactor is sucked into the jet pump, and the chlorine gas and the trisodium solution are contacted and reacted in the jet pump to generate chloroisocyanuric acid Salt. Adjust the chlorine flow rate of the secondary reactor to control the temperature of the primary reactor at 17±2°C.

[0038] 2. Secondary chlorination reaction

[0039] The reaction liquid in the prim...

Embodiment 3

[0042] Embodiment three: the production of 10,000 tons of trichloroisocyanuric acid per year

[0043] 1. Primary chlorination reaction

[0044] The trisodium solution with a concentration of 9.2% trisodium cyanurate is cooled to 6±2°C through a heat exchanger, and the temperature is 12m 3 The flow rate of / h continuously enters the primary reactor. The primary reaction kettle is a ￠1500×2500 conical bottom PVC container with an effective volume of about 2.5m 3 . The material in the primary reactor is pumped and circulated, and the vacuum is generated by the jet pump, and the chlorine gas in the secondary reactor is sucked into the jet pump, and the chlorine gas and the trisodium solution are contacted and reacted in the jet pump to generate chloroisocyanuric acid Salt. Adjust the chlorine flow rate of the secondary reactor to control the temperature of the primary reactor at 18±2°C.

[0045] Secondary chlorination reaction, centrifugation and drying are the same as those ...

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Abstract

The invention discloses a method for producing trichloro-isocyanuric acid by virtue of two-stage continuous chlorination. A production process of the method comprises first-stage chlorination reaction and second-stage chlorination reaction; an excessive amount of chlorine is fed into a second-stage reaction kettle, a cyanuric acid trisodium salt solution is continuously added into a first-stage reactor, the excessive amount of chlorine in the second-stage reaction kettle is sucked into the first-stage reactor for chlorination reaction by virtue of an ejection pump of a first-stage reaction system, and a reaction liquid overflows into the second-stage reaction kettle to continuously react to generate trichloro-isocyanuric acid. The chlorination reaction degree of materials inside the one-stage reactor and the chlorine feeding amount of the second-stage reaction kettle are controlled by virtue of the reaction temperature of the first-stage reactor. The method is small in amount of chlorination mother liquid and high in reaction efficiency, and a gas discharged from the first-stage reactor is free of chlorine. The time that the material is retained in the chlorination reaction system is short, so that side reaction can be reduced, the effective chlorine of a product is kept greater than 90%, and the yield is more than 86%.

Description

technical field [0001] The invention belongs to the technical field of disinfectants and relates to a method for producing trichloroisocyanuric acid through two-stage continuous chlorination. Background technique [0002] Trichloroisocyanuric acid is a high-efficiency, broad-spectrum, and low-toxicity disinfectant, which has a good killing effect on bacteria, fungi, and viruses. Trichloroisocyanuric acid is mainly used for disinfection of swimming pool water, and is also widely used for sanitation and disinfection of hotels, hospitals and other public places and families. In China, it is also used for environment and water disinfection of aquaculture, sericulture and other aquaculture industries. It is also used as a kill in the circulating water system. Due to its stable chemical properties and high available chlorine, it is made into small packages of different dosage forms for easy storage and portability, and can be used as a disinfectant in disaster areas and epidemic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D251/36
CPCC07D251/36
Inventor 阮积彬王绍安赵荣卿钟鑫林健
Owner 南宁中天科技工程有限公司