A device and method for processing raw material gas from thionyl chloride production

A technology of thionyl chloride and treatment method, applied in chemical instruments and methods, separation methods, sulfur trioxide/sulfuric acid and other directions, can solve the problems of high impurity content and low purity of sulfur dioxide, and achieve low waste liquid generation and reduction. Sedimentation, the effect of improving the discharge situation

Active Publication Date: 2021-11-23
JIANGXI SELON INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of this, the present invention aims to propose a device and method for processing raw material gas produced by thionyl chloride, so as to solve the problem of high impurity content and low purity of the raw material gas obtained in the prior art, especially sulfur dioxide

Method used

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  • A device and method for processing raw material gas from thionyl chloride production
  • A device and method for processing raw material gas from thionyl chloride production
  • A device and method for processing raw material gas from thionyl chloride production

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Experimental program
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Effect test

Embodiment 1

[0082] S1, get the sulfur dioxide gas purchased from the market, use drying device 8 to dry the sulfur dioxide gas, the composition in the sulfur dioxide gas after drying is sulfur dioxide (99.5w%), dust (0.42w%), moisture (0.02w%) , non-condensable gas and other substances (0.06w%); filter sulfur dioxide by air filter device 9 to obtain pure sulfur dioxide gas;

[0083] S2. At normal temperature, pressurize the compressor 10, condense the sulfur dioxide gas through the condenser 11 to obtain liquid sulfur dioxide, and transport the liquid sulfur dioxide to the storage tank 12 as the raw material gas for the production of thionyl chloride.

[0084] Liquid sulfur dioxide was tested for purity, and the results are shown in Table 1.

Embodiment 2

[0086] S1. Collect the tail gas in the production process of thionyl chloride to obtain a mixed gas A; wherein the mixed gas A includes sulfur dioxide, chlorine, hydrogen chloride, sulfur monochloride vapor, sulfur dichloride vapor, and thionyl chloride vapor;

[0087] S2. Transport the mixed gas A to the first absorption tank 3 through a pneumatic diaphragm pump, and use carbon disulfide to perform first-stage absorption on the mixed gas A to remove sulfur monochloride vapor, sulfur dichloride vapor, thionyl chloride vapor, Chlorine, to obtain mixed gas B;

[0088] S3, transporting the mixed gas B to the second absorption tank 4, using ethylene glycol to perform second-stage absorption on the mixed gas B, removing hydrogen chloride, and obtaining sulfur dioxide-enriched gas;

[0089] S4. Pass the sulfur dioxide-rich gas into the barium hydroxide and barium chloride composite solution in the third absorption kettle 5 to obtain a barium sulfite-containing slurry, and use the ce...

Embodiment 3

[0095] S1. Collect the tail gas in the production process of thionyl chloride to obtain a mixed gas A; wherein the mixed gas A includes sulfur dioxide, chlorine, hydrogen chloride, sulfur monochloride vapor, sulfur dichloride vapor, and thionyl chloride vapor;

[0096] S2. Transport the mixed gas A to the first absorption tank 3 through a pneumatic diaphragm pump, and use carbon tetrachloride to perform first-stage absorption on the mixed gas A to remove sulfur monochloride vapor, sulfur dichloride vapor, and chlorinated Sulfone steam, chlorine gas, obtain mixed gas B;

[0097] S3. Transport the mixed gas B to the second absorption tank 4, and use the 1,2-propanediol and 1,2-butanediol mixed reagent with a volume ratio of 2:1 to perform second-stage absorption on the mixed gas B to remove hydrogen chloride , to obtain sulfur dioxide-rich gas;

[0098] S4. Pass the sulfur dioxide-rich gas into the barium hydroxide and barium chloride composite solution in the third absorption ...

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Abstract

The invention provides a processing device and method for producing raw material gas from thionyl chloride, the raw material gas at least includes sulfur dioxide; after drying the sulfur dioxide gas, the sulfur dioxide gas is sent to an air filter device to filter the dust in the sulfur dioxide, Obtain pure sulfur dioxide gas; after being pressurized by a compressor, the sulfur dioxide gas is condensed by a condenser at normal temperature to obtain liquid sulfur dioxide, and the liquid sulfur dioxide is transported to a storage tank as a raw material gas for the production of thionyl chloride; the present invention The device and method for processing the raw material gas for the production of thionyl chloride improve the purity of the sulfur dioxide raw material gas.

Description

technical field [0001] The invention relates to a treatment device and method for raw material gas produced by thionyl chloride. Background technique [0002] Thionyl chloride, also known as thionyl chloride, thionyl chloride, its molecular formula is SOCl 2 , as a basic chemical raw material, has the advantages of complete chlorination and less side reactions, and is widely used in the preparation of acyl chlorides, as well as in the production of pesticides, medicines, and dyes. In the prior art, thionyl chloride is often synthesized by gas-phase catalytic method, using activated carbon as a catalyst, sulfur chloride reacts with sulfur dioxide and chlorine gas, which has the advantages of simple process, low investment, high product purity, etc., and a closed internal circulation device can be used Production, no environmental pollution. [0003] In the process of producing thionyl chloride in the existing closed internal circulation method, concrete such as: [0004] U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/48B01D53/50B01D53/68B01D53/70B01D53/78C01B17/69
CPCB01D53/48B01D53/502B01D53/68B01D53/70B01D53/78C01B17/69
Inventor 程文明敖永平朱卫昌
Owner JIANGXI SELON INDAL
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