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Preparing method of thionyl chloride

A technology of thionyl chloride and chlorine gas, which is applied in the direction of thionyl chloride, sulfur and halogen compounds, etc., can solve problems such as complex processes, and achieve the effects of increasing product yield, strong system safety, and low energy consumption

Inactive Publication Date: 2017-01-25
SHANDONG KAISHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most domestic thionyl chloride production enterprises adopt the sulfur dioxide gas phase method, but the process of producing thionyl chloride by this method is complicated, and more condensers, pumps, etc. are inevitably added during the synthesis and preparation of thionyl chloride. equipment

Method used

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  • Preparing method of thionyl chloride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The raw material mixture gas composed of sulfur dioxide, chlorine and sulfur dichloride enters from the upper part of the reactor, the gas phase of the crude thionyl chloride directly enters the rectification tower from the lower part of the reactor, and the gas phase at the top of the rectification tower is circulated back to the reactor, and the rectification tower Qualified products are produced in the middle; the pressure of the reactor and the rectification tower are both normal pressure, the temperature of the reactor is 100°C, the gas phase at the top of the rectification tower is controlled by the fan for circulation, and the middle of the rectification tower is equipped with a liquid accumulator. The temperature of the liquid vessel is controlled at 77°C, and the temperature of the rectifying column tank is 140°C. The product yield is 99.95%.

Embodiment 2

[0018] The raw material mixture gas composed of sulfur dioxide, chlorine and sulfur dichloride enters from the upper part of the reactor, the gas phase of the crude thionyl chloride directly enters the rectification tower from the lower part of the reactor, and the gas phase at the top of the rectification tower is circulated back to the reactor, and the rectification tower Qualified products are produced in the middle; the pressure of the reactor and the rectification tower are both normal pressure, the temperature of the reactor is 400°C, the gas phase at the top of the rectification tower is controlled by the fan for circulation, and the middle of the rectification tower is equipped with a liquid accumulator. The temperature of the liquid vessel is controlled at 76°C, and the temperature of the rectifying column tank is 110°C. The product yield is 99.96%.

Embodiment 3

[0020] The raw material mixture gas composed of sulfur dioxide, chlorine and sulfur dichloride enters from the upper part of the reactor, the gas phase of the crude thionyl chloride directly enters the rectification tower from the lower part of the reactor, and the gas phase at the top of the rectification tower is circulated back to the reactor, and the rectification tower Qualified products are produced in the middle; the pressure of the reactor and the rectification tower is normal pressure, the temperature of the reactor is 300 ° C, the gas phase at the top of the rectification tower is controlled by the fan, and a liquid accumulation device is installed in the middle of the rectification tower. The temperature of the liquid vessel is controlled at 78°C, and the temperature of the rectifying column tank is 120°C. The product yield is 99.98%.

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Abstract

The invention belongs to the technical field of chemical synthesis, and relates to a preparing method of thionyl chloride. The raw material mixture composed of sulfur dioxide, chlorine gas and sulfur dichloride is fed from the upper part of the reactor, and the crude sulfurous sulfide gas phase is directly from the lower part of the reactor into the rectifying tower, the top of the rectifying tower gas phase is cycled back to the reactor, and the middle of the rectifying tower produces qualified products; the reactor and rectifying tower pressure is atmospheric pressure. The preparing method of thionyl chloride simplifies the process for the preparation of thionyl chloride by sulfur dioxide. The reaction in atmospheric pressure, simple process, low energy consumption, and high system safety improve the product yield, which is up to 99.95%.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of thionyl chloride. Background technique [0002] At present, most domestic thionyl chloride production enterprises adopt the sulfur dioxide gas phase method, but the process of producing thionyl chloride by this method is complicated, and more condensers, pumps, etc. are inevitably added during the synthesis and preparation of thionyl chloride. equipment. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of thionyl chloride, which has low energy consumption, simple production process and greatly improved product yield. [0004] The preparation method of thionyl chloride of the present invention is that the raw material mixture gas composed of sulfur dioxide, chlorine and sulfur dichloride enters from the upper part of the reactor, and the gas phase of the crude thionyl chlori...

Claims

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Application Information

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IPC IPC(8): C01B17/45
CPCC01B17/4584
Inventor 谢圣斌张泰铭张良张善民孙丰春刘嵩高俊
Owner SHANDONG KAISHENG NEW MATERIALS