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A method for producing trichloroisocyanuric acid in a supergravity field

A technology for producing trichloroisocyanide and hypergravity field, which is applied in the direction of organic chemistry, etc., can solve the problems of low comprehensive value of recyclability, high consumption of kettle type reactor, high process labor intensity, etc., and achieves the advantages of recycling operation, The product yield is safe and environmentally friendly, and the effect of easy promotion and application

Active Publication Date: 2022-04-19
山东昌邑海能化学有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, trichloroisocyanuric acid is mainly produced by the chlorine gas method, that is, chlorine gas directly reacts with alkali, carbonate or isocyanate dissolved in water or other solvents. The defect of this process is: the consumption of reactants is large , and every ton of product produced will produce 6-9 tons of waste water, which contains a large amount of sodium chloride, and trichloroisocyanuric acid or dichloroisocyanurate, but its own value is not as high as the cost of recycling, As a result, the comprehensive value of recyclables is low, and it is basically in a state of efflux, causing serious environmental pollution
In addition, in this process, because cyanuric acid is easy to generate nitrogen trichloride in alkaline solution, the trichloroisocyanuric acid product will also decompose to generate nitrogen trichloride under heat or alkaline conditions, and nitrogen trichloride It is very easy to explode in the closed reaction container of chlorination reaction, which affects the safety of production
[0004] Chinese invention patent application 200510048183.5 discloses a production method for using sodium hypochlorite-chlorine gas to continuously synthesize sodium dichloroisocyanurate and co-produce trichloroisocyanuric acid in one step, and 201010254956.6 discloses a method for producing trichloroisocyanurate using calcium carbonate as a raw material The production process of uric acid, and 201510238770.4 disclosed the research and application of the new process of cyanuric acid derivatives, which are ecologically friendly and zero-emission, all belong to the above-mentioned traditional process category, and do not get rid of the problems of the traditional process; and the tank reactor has high consumption and low yield. The process is labor-intensive and the production continuity is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The steps of producing trichloroisocyanuric acid are as follows:

[0025] (1) Hypochlorous acid mist production: Excess chlorine gas and metal oxides are reacted in the hypergravity field formed by the first hypergravity reactor, and hypochlorous acid mist is separated upwards, and chlorine is separated downwards. Salt solution, recovery and extraction of chloride salt in the chloride salt solution, the remaining chlorine gas is discharged from the tail gas outlet of the first high gravity reactor and then returned to the first high gravity field to prepare hypochlorous acid mist;

[0026] (2) Desalting: use a salt catcher to desalt the hypochlorous acid mist produced in step (1);

[0027] (3) Preparation of trichloroisocyanuric acid: the hypochlorous acid mist and cyanuric acid slurry treated in step (2) undergo a gas-liquid-solid three-phase reaction in the hypergravity field formed by the second hypergravity reactor to obtain Trichloroisocyanuric acid. The cyanuric...

Embodiment 2

[0031] The differences between this embodiment and Embodiment 1 are:

[0032] In step (1), chlorine gas and metal hydroxide react in the hypergravity field formed by the first hypergravity reactor, and the metal hydroxide can specifically be sodium hydroxide, calcium hydroxide or / and magnesium hydroxide, etc., as long as It only needs to be able to consume the hydrochloric acid produced in the reaction, and its specific substance is not specifically limited;

[0033] In step (3), the preparation of trichloroisocyanuric acid: the concentration of the cyanuric acid slurry used is 35%, and the molar ratio of chlorine gas to cyanuric acid is 6:1.

[0034] The prepared trichloroisocyanuric acid has been tested and its available chlorine is above 91.5%. All the other are the same as embodiment one.

Embodiment 3

[0036] The differences between this embodiment and Embodiment 1 are:

[0037] In step (1), chlorine gas and carbonate react in the hypergravity field formed by the first hypergravity reactor. Specifically, the carbonate can be sodium carbonate, calcium carbonate or / and magnesium carbonate, as long as it can consume the Hydrochloric acid can be used, and its specific substance is not specifically limited;

[0038] In step (3), the preparation of trichloroisocyanuric acid: the concentration of the cyanuric acid slurry used is 50%, and the molar ratio of chlorine gas to cyanuric acid is 10:1. All the other are the same as embodiment one.

[0039] The prepared trichloroisocyanuric acid has been tested and its available chlorine is above 91.4%. All the other are the same as embodiment one.

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PUM

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Abstract

The invention discloses a method for producing trichloroisocyanuric acid in a supergravity field, which belongs to the technical field of heterocyclic compounds, and includes (1) arranging excess chlorine gas and a metal compound that consumes hydrochloric acid in a first supergravity field ‑Liquid countercurrent reaction, the hypochlorous acid mist is separated upward, and the chloride solution is separated downward; (2) Desalting the hypochlorous acid mist prepared in step (1); (3) Prepared by step (2) The hypochlorous acid mist and cyanuric acid slurry undergo a gas-liquid-solid three-phase reaction in the second hypergravity field to prepare trichloroisocyanuric acid in three steps. This method uses excessive chlorine gas to generate hypochlorous acid and chloride salt as much as possible, and also makes the first hypergravity field in an acidic environment, reducing decomposition; and the hypochlorous acid mist after desalination is more conducive to subsequent reactions, and ultimately jointly improve The yield of trichloroisocyanuric acid; and cyanuric acid or trichloroisocyanuric acid do not come into contact with alkaline substances, avoiding the production of nitrogen trichloride and environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of heterocyclic compounds, and in particular relates to a method for producing trichloroisocyanuric acid in a supergravity field. Background technique [0002] Trichloroisocyanuric acid is one of the chlorinated isocyanuric acid series products, it is white crystalline powder or granular solid, and has a strong chlorine gas pungent smell. Its available chlorine is above 90%, which is 2 to 3 times higher than that of bleaching powder. It has high-efficiency, broad-spectrum, and relatively safe disinfection effects. It has gradually become a replacement product for bleaching powder and bleaching essence. Disinfection and sterilization of restaurants, hotels, public places, families, hospitals, poultry eggs and prevention of fish disease. And the three wastes produced by the production of trichloroisocyanuric acid are much lower than that of bleaching essence, and advanced countries use it to replace bleaching...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D251/36
CPCC07D251/36
Inventor 于强强王金富高唤弟安文超丁术鹏张伟
Owner 山东昌邑海能化学有限责任公司