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Method for synthesizing thionyl chloride with crude product thionyl chloride as raw material

A technology for thionyl chloride and crude products, which is applied in the field of raw material synthesis, and can solve problems such as difficult separation, complicated process, and difficulty in obtaining high purity

Active Publication Date: 2009-04-22
JIANGXI SELON INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) Phosphorus pentachloride reacts with sulfur dioxide, the process is simple, but SOCl 2 with POCl 3 Difficult to separate, difficult to obtain high-purity SOCl 2 ;
[0010] (2) Using antimony chloride etc. as a catalyst, sulfur chloride reacts with chlorosulfonic acid, which is widely used in China at present, with complex process and large investment;

Method used

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  • Method for synthesizing thionyl chloride with crude product thionyl chloride as raw material
  • Method for synthesizing thionyl chloride with crude product thionyl chloride as raw material
  • Method for synthesizing thionyl chloride with crude product thionyl chloride as raw material

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Embodiment 1

[0094] A method for synthesizing thionyl chloride with crude product thionyl chloride as raw material, comprising:

[0095] (1) The crude product sulfur oxychloride whose content of sulfur oxychloride accounts for 60% of the crude product sulfur oxychloride is vulcanized in a vulcanization kettle, and the crude product sulfur oxychloride also contains 18% of sulfur dichloride , Sulfur monochloride 20%. The temperature in the vulcanization kettle is that the residual temperature of the crude product thionyl chloride is 65° C., and the pressure is normal pressure. To the crude product thionyl chloride, add sulfur that is not excessive relative to the sulfur dichloride therein. The amount of sulfur added is For 80% of the amount of sulfur required for the complete reaction with the sulfur dichloride in the crude product sulfur oxychloride, so that other substances in the crude product sulfur oxychloride are converted into sulfur monochloride except for the sulfur oxychloride, obt...

Embodiment 2

[0105] A method for synthesizing thionyl chloride with crude product thionyl chloride as raw material, comprising:

[0106] (1) The crude product sulfur oxychloride whose content of sulfur oxychloride accounts for 65% of the crude product sulfur oxychloride is vulcanized in a vulcanization kettle, and the crude product sulfur oxychloride also contains 20% of sulfur dichloride , the temperature in the vulcanization kettle is that the residual temperature of the crude product thionyl chloride is ≤ 80°C, and the pressure is 0.12MPa. Add sulfur that is not excessive relative to the sulfur dichloride therein in the crude product thionyl chloride, and the amount of sulfur The amount added is 88% of the amount of sulfur required for the complete reaction of sulfur dichloride in the crude product thionyl chloride, so that other substances in the crude product thionyl chloride except thionyl chloride are converted into sulfur monochloride , to obtain the crude sulfur oxychloride after su...

Embodiment 3

[0116] A method for synthesizing thionyl chloride with crude product thionyl chloride as raw material, comprising:

[0117] (1) The crude product sulfur oxychloride whose content of sulfur oxychloride accounts for 68% of the crude product sulfur oxychloride total amount is vulcanized in a vulcanization kettle, and also contains 15% sulfur dichloride in the crude product sulfur oxychloride , the temperature in the vulcanization kettle is that the residual temperature of the crude product thionyl chloride is ≤ 80°C, and the pressure is normal pressure, and the sulfur that is not excessive relative to the sulfur dichloride therein is added to the crude product thionyl chloride, and the amount of sulfur is The amount added is 80-98% of the amount of sulfur required for the complete reaction of sulfur dichloride in the crude product thionyl chloride, so that other substances in the crude product thionyl chloride except thionyl chloride are converted into monochlorine sulfur sulfide...

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Abstract

The invention relates to a method for synthesizing thionyl chloride which takes a crude thionyl chloride product as an initial point. The method is a totally closed circulating process comprising the following steps: other materials in the synthesized crude thionyl chloride product is used to react with sulfur so as to mainly produce a sulfur monochloride product; the other materials comprises sulfur monochloride, sulfur dichloride, thionyl chloride, a small amount of chlorine and sulfur dioxide; and then the sulfur monochloride product is used to synthesize thionyl chloride together with chlorine, sulfur dichloride, and a gas product from the condenser after thionyl chloride synthesis and the crude product purification process.

Description

technical field [0001] The present invention relates to a method for synthesizing thionyl chloride by using crude thionyl chloride as a raw material. Specifically, the present invention is a method for utilizing other substances in the synthesized crude thionyl chloride and the The generated sulfur monochloride is then combined with chlorine gas, sulfur dioxide and gas products from the condenser after the synthesis of sulfur oxychloride and the crude product purification process to synthesize thionyl chloride in a fully closed cycle process. Background technique [0002] Thionyl chloride is an important intermediate raw material for the synthesis of pesticides, medicines, photosensitive materials and polymer intermediates. The prior art discloses some technical solutions for the synthesis and purification of thionyl chloride, including: [0003] ZL95110380 discloses a kind of manufacture method of thionyl chloride, this method is to utilize sulfur dioxide and the monochlori...

Claims

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Application Information

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IPC IPC(8): C01B17/45
Inventor 汪国清汪新泉戴恒文潘英曙李世群郑小辉刘朔
Owner JIANGXI SELON INDAL
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