Production method of isocyanuric acid

An isocyanuric acid and production method technology, applied in the direction of organic chemistry, etc., can solve the problems of non-compliance with clean production and environmental protection requirements, large steam consumption, low absorption efficiency, etc., to expand the industrial chain, reduce steam consumption, thermal energy low loss effect

Inactive Publication Date: 2010-09-15
HEZE WOLAN CHEM
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Problems solved by technology

[0008] Now domestic production of isocyanuric acid generally adopts "coal-fired heating method" to produce crude products and "intermittent open straight-through steam heating method" to produce high-quality products, which has high energy consumption and serious pollution. The ammonia gas and isocyanuric acid produced by urea condensation The dilute sulfuric acid produced in the process only adopts one-stage simple absorption and low-altitude discharge, and the absorption efficiency is low. The excess dilute sulfuric acid is neutralized with lime milk and then discharged. On the one hand, it causes a waste of resources, and on the other hand, it also pollutes the environment. Production and environmental protection requirements, product concentration adopts simple kettle distillation, and steam consumption is large

Method used

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  • Production method of isocyanuric acid
  • Production method of isocyanuric acid
  • Production method of isocyanuric acid

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Effect test

Embodiment 1

[0045] 1.5 tons of urea and 1.5 kilograms of ammonium chloride are polycondensed in the polymerization furnace, and the material after the furnace is coarsely crushed and finely crushed to obtain the isocyanuric acid fine material. 1.2 tons of isocyanuric acid fine material, 1400 liters of mass percent are Put 25% sulfuric acid into the first batching tank and the second batching tank respectively, then connect the batching tank, mix the two evenly, and drive the feed liquid into the 3000-liter first-stage pressurized reaction kettle by the power pump, and pass through at the same time Enter steam to heat the feed liquid. The pressure in the reactor is 0.4MPa and the temperature is 138°C. Under this condition, the feed liquid is instantly hydrolyzed. After the first-stage pressurized reactor is full, the feed liquid enters 3000 m The hydrolysis reaction continues to occur in the secondary pressurized reactor. At this time, the pressure in the secondary pressurized reactor is 0....

Embodiment 2

[0051] 3 tons of urea and 6 kilograms of ammonium chloride are polycondensed in the polymerization furnace, and the material after the furnace is coarsely crushed and finely crushed to obtain the isocyanuric acid fine material. 2.4 tons of isocyanuric acid fine material and 2800 liters of mass percent are Put 25% sulfuric acid into the first batching tank and the second batching tank respectively, then connect the batching tank, mix the two evenly, and then drive the feed liquid into a 6000-liter first-stage pressurized reactor by a power pump, and pass Enter steam to heat the feed liquid. The pressure in the reactor is 0.4MPa and the temperature is 135°C. Under this condition, the feed liquid is instantly hydrolyzed. After the first-stage pressurized reactor is full, the feed liquid enters 6000 m The hydrolysis reaction continues to occur in the secondary pressurized reactor. At this time, the pressure in the secondary pressurized reactor is 0.3MPa and the temperature is 133°C...

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Abstract

The invention discloses a production method of isocyanuric acid, in particular relates to a method for producing isocyanuric acid by adopting fully-enclosed continuous four-stage vapour pressure differential reaction. The production method of the isocyanuric acid is characterized in that after isocyanuric acid fine material and sulfuric acid the weight percent of which is 25 percent are evenly mixed, the hydrolysis reaction is generated in sequence by a closed four-stage pressurizing reaction kettle under the action of vapour heating, and feed liquid enters a cooling reaction kettle for being cooled after the reaction is ended, therefore, the production method of the isocyanuric acid has the advantages of not only effectively utilizing energy sources and saving cost but also greatly reducing the smoke discharge amount, saving coal and electricity and greatly improving the production efficiency.

Description

(1) Technical field [0001] The invention relates to a production method of isocyanuric acid, in particular to a method for producing isocyanuric acid by adopting a fully enclosed continuous four-stage steam pressure difference reaction. (2) Background technology [0002] Isocyanuric acid, also known as cyanuric acid, cyanuric acid, chemical name is 2,4,6-trihydroxy-1,3,5-triazine, molecular formula C 3 h 3 N 3 o 3 , molecular weight 129.1, appearance is white crystalline powder, odorless, slightly soluble in water, soluble in hot alcohol, pyridine, concentrated hydrochloric acid and hot sulfuric acid, insoluble in cold methanol, ether, acetone, benzene and chloroform, specific gravity 1.768 (including Two crystal waters), melting point 330°C (decomposition), pH value of saturated solution ≥ 4.0, used to manufacture cyanuric acid bromide, chloride, bromochloride, iodochloride and its cyanurates, esters, mainly It is used for the synthesis of new-type bactericidal disinfec...

Claims

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Application Information

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IPC IPC(8): C07D251/32
Inventor 刘东杰杨一言
Owner HEZE WOLAN CHEM
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