Method for producing chlorosulfonyl isocyanate by taking cyanogen chloride and sulfur trioxide as raw materials

A chlorosulfonyl isocyanate, sulfur trioxide technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of sulfonic acid amides, etc. Filler blockage and other problems, to achieve the effect of safe and stable production process, uniform and controllable residence time, and thorough reaction

Inactive Publication Date: 2015-03-25
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production efficiency is low by using the tank reaction. In order to pursue the conversion rate of one raw material, a large excess of another raw material is required, resulting in many by-products, high consumption of raw materials and energy; by-products generated by the tower reaction are easy to cause tower Disk or packing clogging, so that the production process cannot run for a long time

Method used

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  • Method for producing chlorosulfonyl isocyanate by taking cyanogen chloride and sulfur trioxide as raw materials
  • Method for producing chlorosulfonyl isocyanate by taking cyanogen chloride and sulfur trioxide as raw materials
  • Method for producing chlorosulfonyl isocyanate by taking cyanogen chloride and sulfur trioxide as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The production method of chlorosulfonyl isocyanate is prepared by tubular reaction, and the raw materials used in the production process are cyanogen chloride and sulfur trioxide. The production equipment used includes cyanogen chloride dispersive dilution tubes and sulfur trioxide dispersive dilution tubes, tubular reactors and tubular by-product thermal decomposition reactors, crude product separation devices, purification and separation towers, connecting pipelines, metering and control instruments and appendix. Among them, the cyanogen chloride dispersion dilution pipe and the sulfur trioxide dilution pipe are equipped with chemical fillers, the tubular reactor and the tubular thermal decomposition reactor are multiple commercially available static mixers with jackets connected in series through connecting pipes, and the crude product separation device is simultaneously It has the functions of flash evaporation and sedimentation, and the purification and separat...

Embodiment 2

[0036] Embodiment 2 is the same as Embodiment 1, except that the cyanogen chloride dispersing dilution tube, the sulfur trioxide dispersing mixing tube, the tubular reactor, and the tubular by-product thermal decomposition reactor are filled with fillers in the tube, and the material In the tubular reactor, the tubular by-product pyrolysis reactor flows downwards and upwards.

Embodiment 3

[0038] Embodiment 3 is basically the same as Embodiment 1, the difference is that the tubular reactor and the tubular by-product thermal decomposition reactor are vertically arranged, and the material is unidirectionally downward in the tubular reactor and the tubular by-product thermal decomposition reactor flow.

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PUM

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Abstract

The invention relates to a method for producing chlorosulfonyl isocyanate by taking cyanogen chloride and sulfur trioxide as raw materials, belonging to the methods for producing chlorosulfonyl isocyanate. The method comprises the following steps: feeding the raw materials into a tubular reactor at a theoretical molar ratio, enabling the raw materials to react continuously in the tubular reactor, feeding the by-products of reaction into a tubular thermal decomposition reactor of by-products, continuously converting the by-products of reaction to the desired product, separating the crude product, and purifying to obtain the high-purity chlorosulfonyl isocyanate. The method provided by the invention can realize the production of the chlorosulfonyl isocyanate through continuous reaction in the tubular reactor, and the method has the advantages of low investment in devices, high production efficiency and strong production capacity. The advanced production process is adopted to produce the chlorosulfonyl isocyanate, a few by-products are generated during reaction in the tubular reactor, and the by-products can be completely converted into the target product through thermal decomposition reaction. No by-product is sent out of the bound in addition to the impurities involved into the raw materials in the production process, the utilization rate of the raw materials is high, the product has high quality, the production process is stable, and the method is easy to operate and has large operating flexibility.

Description

technical field [0001] The invention relates to a manufacturing method of chemical products, in particular to a production method of preparing chlorosulfonyl isocyanate by using cyanogen chloride and sulfur trioxide as raw materials. Background technique [0002] Chlorosulfonyl isocyanate is a very important chemical intermediate, which can be used in the pharmaceutical and pesticide industries, and can also be used as an improver for synthetic fibers and resins. The manufacturing process of chlorosulfonyl isocyanate is not complicated, and industrial production generally adopts kettle reaction, tower reaction or combined reaction of kettle and tower, and then the crude chlorosulfonyl isocyanate obtained from the reaction is purified and separated to obtain the product chlorosulfonyl isocyanate. Although the existing production methods are more mature, the technical level is not high. The production efficiency is low by using the tank reaction. In order to pursue the conve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C311/65C07C303/36C07C303/44
Inventor 吴剑华
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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