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Method and equipment for refining sulfoxide chloride

A kind of thionyl chloride, rectifying tower technology, applied in the field of chemical technology production

Active Publication Date: 2015-02-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method and equipment for refining sulfoxide chloride
  • Method and equipment for refining sulfoxide chloride
  • Method and equipment for refining sulfoxide chloride

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Pass the saturated steam raw material containing 96% (mass fraction) of thionyl chloride and 4% thionyl chloride into the heater, heat it to 90°C, and then enter the fixed bed reactor. The activated carbon in the reactor is amorphous granular activity Carbon, to ensure that the residence time of the medium in the activated carbon is between 0.12-0.20 seconds, the decomposition reaction of sulfone chloride occurs (2), the conversion rate of sulfone chloride is above 95%, and the reacted gas enters the cooler to cool to saturation The liquid enters the rectification tower, the pressure inside the tower is normal pressure, the temperature at the top of the tower is -12°C, the temperature at the bottom of the tower is 76°C, and the molar reflux ratio is 5. The obtained product contains 99.8% of thionyl chloride and 0.2% of thionyl chloride %.

Embodiment 2

[0031] Pass saturated steam containing 95% of thionyl chloride and 5% of thionyl chloride into the heater, heat it to 95°C, and then enter the fixed bed reactor. The activated carbon in the reactor is amorphous granular activated carbon, ensuring that the medium is The residence time in the activated carbon is between 0.12-0.20 seconds, the decomposition reaction of sulfone chloride occurs (2), the conversion rate of sulfone chloride is above 95%, and the reacted gas enters the cooler to be cooled into a saturated liquid and enters the rectification tower Inside, the pressure inside the tower is normal pressure, the temperature at the top of the tower is -13°C, the temperature at the bottom of the tower is 76°C, and the molar reflux ratio is 6. The obtained product contains 99.8% of thionyl chloride and 0.2% of thionyl chloride.

Embodiment 3

[0033]Pass the saturated steam containing 94% of thionyl chloride and 6% of thionyl chloride into the heater, heat it to 100°C, and then enter the fixed bed reactor. The activated carbon in the reactor is amorphous granular activated carbon to ensure that the medium is The residence time in the activated carbon is between 0.12-0.20 seconds, the decomposition reaction of sulfone chloride occurs (2), the conversion rate of sulfone chloride is above 95%, and the reacted gas enters the cooler to cool into a saturated liquid and enters the rectification tower Inside, the pressure inside the tower is normal pressure, the temperature at the top of the tower is -14°C, the temperature at the bottom of the tower is 75°C, and the molar reflux ratio is 7. The obtained product contains 99.7% of thionyl chloride and 0.3% of thionyl chloride.

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Abstract

The invention relates to a method and equipment for refining sulfoxide chloride. A saturated vapor raw material enters a heater and is heated into a superheated gas in the heater; the superheated gas enters a fixed-bed reactor and subjected to decomposition reaction by contacting with an activated carbon bed layer in the fixed-bed reactor; the gas enters a cooler after being reacted to be cooled into saturated liquid, and the saturated liquid enters a rectifying tower; gas-solution mass transfer is carried out in the rectifying tower; and sulphone chloride, sulfur dioxide and chlorine are collected on a tower top, and high-purity sulfoxide chloride products are collected at a tower bottom. According to the invention, the purity of the sulfoxide chloride is more than 99.7%, and the content of the sulphone chloride is lower than 0.3%.

Description

technical field [0001] The invention belongs to the field of chemical technology production, in particular to a method and equipment for refining thionyl chloride. Background technique [0002] Thionyl chloride is a colorless or pale yellow liquid with a pungent odor at normal temperature and pressure. It will decompose in a small amount above the boiling point (78.8°C). The decomposition rate is faster at 140°C. The products are sulfur dioxide, chlorine, sulfur dichloride and sulfur monochloride. Because of its strong chlorination and acyl chloride ability, it is an important chemical intermediate and widely used in traditional industries such as agriculture, medicine and dyes. . In addition, the scope of application of thionyl chloride is also expanding, and the downstream fields are gradually increasing. It has been used in food additive industries such as the preparation of sucralose and new energy industries such as the production of lithium batteries. Since my countr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/45
Inventor 黄国强靳权
Owner TIANJIN UNIV
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