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Production method for sulfonyl isocyanate

The technology of a sulfonyl isocyanate and its production method is applied in the production field of sulfonyl isocyanate, which can solve the problems of complex manufacturing process of methyl carbamate, high waste rate of raw materials, low product yield, etc., shorten the reaction time, reduce the cost of raw materials and Energy consumption, the effect of simplifying the synthesis system

Inactive Publication Date: 2012-12-12
ANHUI GUANGXIN AGROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the manufacturing process of methyl carbamate in China is complicated, the waste rate of raw materials is high, the product yield is low, the environmental pollution is serious, and the competitiveness is poor compared with similar foreign products, which cannot meet the market demand for high-quality and low-priced products.

Method used

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Embodiment Construction

[0010] The present invention uses sulfonamide raw material (o-chlorobenzenesulfonamide, 2-sulfonamido-methyl benzoate, 2-sulfonamido methyl benzoate, 2-methoxycarbonyl-3-sulfonamidothiophene) and The xylene is configured into sulfonamide slurry, and the sulfonamide slurry is obtained by photochemical synthesis of phosgene under the action of a catalyst, which is driven off by nitrogen and filtered to obtain a finished product.

[0011] The specific synthesis process is: put the measured xylene into the slurry preparation kettle at one time with a pump, then add the measured sulfonamide raw materials, make the sulfonamide into a sulfonamide slurry, open the jacket of the slurry kettle, and enter the cooling water , Outlet valve, cool the material to room temperature for later use. Put the metered catalyst into the catalyst metering tank for standby use. Add a certain amount of xylene into the photochemical kettle as a primer, and after the completion, open the steam inlet and ...

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Abstract

The invention provides a production method for sulfonyl isocyanate. The method comprises the steps of adding dimethylbenzene into a slurry-preparing kettle in one time; adding raw materials of sulfonamides to prepare a sulfanilamide slurry; cooling to a normal temperature for use; adding dimethylbenzene into a photochemical kettle as a base material; adding the sulfanilamide slurry and a catalyst into the photochemical kettle; passing phosgene through till to a reaction terminal point; transferring reaction product to a phosgene-driving kettle; driving phosgene with nitrogen; cooling to the normal temperature; filtering; and thus the product of sulfonyl isocyanate is obtained. The procedure simplifies a synthetic system of sulfonyl isocyanate, improves yield of sulfonyl isocyanate, simplifies operation programs and shortens reaction time. The whole process procedure is material balance and energy exchange balance. By controlling reaction conditions, high selectivity of the product is achieved; comprehensive utilization is reached; raw materials and energy consumption are decreased; and production cost is greatly reduced.

Description

technical field [0001] The invention relates to a preparation method in the field of chemical industry, in particular to a production method of sulfonyl isocyanate. Background technique [0002] Sulfonyl isocyanate is a kind of chemical product, which is widely used in medicine, pesticide, rubber manufacturing and other industries. It has the characteristics of wide application range and good use effect. At present, the manufacturing process of methyl carbamate in China is complicated, the waste rate of raw materials is high, the product yield is low, the environmental pollution is serious, and the competitiveness is poor compared with similar foreign products, which cannot meet the market demand for high-quality and low-priced products. Contents of the invention [0003] Aiming at the above problems in the prior art, the present invention provides a production method of sulfonyl isocyanate with simple process, high utilization rate of raw materials and little environmenta...

Claims

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Application Information

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IPC IPC(8): C07B43/10C07C311/65C07C303/40C07D333/38
Inventor 黄金祥过学军许健杨小明胡安胜吴建平高焰兵魏健
Owner ANHUI GUANGXIN AGROCHEM
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