Production technology of phenyl sulfuryl chloride

A production process, the technology of benzenesulfonyl chloride, applied in the field of benzenesulfonyl chloride production technology, to achieve the effects of saving ice, avoiding environmental pollution, and reducing environmental pollution

Inactive Publication Date: 2006-08-30
江苏康祥实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing benzenesulfonyl chloride production process, and to provide a method of absorbing hydrogen chloride gas by using a negative pressure falling film type absorption tube cooling tower, and then hydrolyzing and diluting after the sulfonation reaction. 30% concentration of hydrochloric acid is dropped into the sulfonation solution, and the energy is taken away by the hydrogen chloride released during the reaction and dilution process, and the reaction speed, temperature and time are controlled to ensure that the sulfuric acid concentration is 60-65%. The improved process method for the production of benzenesulfonyl chloride

Method used

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  • Production technology of phenyl sulfuryl chloride
  • Production technology of phenyl sulfuryl chloride

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1 Benzenesulfonyl chloride production process

[0028] (1) Raw materials

[0029] Chlorosulfonic acid content ≥ 96%, produced by Suzhou Fine Chemical Co., Ltd.

[0030] Benzene Petroleum grade, produced by Yangzi Petrochemical Company

[0031] (2) Production equipment

[0032] Serial number Equipment name Specification Model Material Quantity

[0033] (1) Sulfonation reaction kettle volume 1500L enamel 1 set

[0034] (2) Hydrolysis dilution kettle volume 2000L enamel 1 set

[0035] (3) Bleaching kettle volume 2000L enamel 1 set

[0036](4) Distillation kettle volume 1500L enamel 1 set

[0037] (5) Tube and tube condenser heat exchange area 10M 2 Enamel 1 set

[0038] (6) Water ring vacuum pump model 2SK-6 1 set

[0039] (7) Water jet homemade polypropylene 1 set

[0040] (8) Graphite polypropylene falling film absorption tower heat transfer area 10M 2 Graphite polypropylene 1 set

[0041] (3) Production control conditions

[0042] (1) Feed molar ...

Embodiment 2

[0057] Embodiment 2 Benzenesulfonyl chloride production process

[0058] (1) Raw materials are the same as in Example 1.

[0059] (2) Production equipment With embodiment 1.

[0060] (3) Production control conditions

[0061] (1) Feed molar ratio proportioning benzene: chlorosulfonic acid=1: 3,

[0062] Among them, benzene 300kg, chlorosulfonic acid 1343kg;

[0063] (2) Sulfonation reaction Stirring speed 70 rpm, reaction temperature ≤ 55 ℃,

[0064] Benzene dropwise reaction time is 5 hours,

[0065] Reaction end point Dropwise reaction finishes and continues to stir for 0.5 hour;

[0066] Hydrolysis dilution Stirring speed 45 rpm, reaction temperature ≤ 50 ° C,

[0067] The total dripping amount of hydrochloric acid is 678kg,

[0068] Control the hydrochloric acid drop rate first slow and then fast 50-200kg / hour,

[0069] Adding time is 4.5 hours, stop stirring immediately after dropp...

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Abstract

The present invention provides a production method of benzenesulfonyl chloride. It is characterized by that said invention uses benzene and chlorosulfonic acid as raw material, and makes them undergo the processes of sulfonation reaction, hydrolytic dilution, standing still and layer separation and reduced pressure distillation so as to obtain the invented product. Said invention also provides the concrete steps of every process and its concrete requirements.

Description

technical field [0001] The present invention relates to the general method of organic chemistry, particularly a kind of benzenesulfonyl chloride production process. Background technique [0002] The existing benzenesulfonyl chloride production process adopts the reaction of benzene and chlorosulfonic acid to prepare, because the hydrogen chloride gas produced by the reaction is input into the plane absorption equipment with a slight positive pressure, and the water in the absorption equipment absorbs the hydrogen chloride and releases heat to make the temperature continuously rise. The effect is getting worse and worse. Due to the action of high-temperature hydrochloric acid, the equipment and contacts of the absorption system are easily corroded and damaged, resulting in a large amount of hydrogen chloride gas leakage and cannot be absorbed. The exhaust gas is then sprayed and absorbed by the ceramic absorption tower and then discharged into the sewe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/02C07C309/86
Inventor 朱康洋
Owner 江苏康祥实业集团有限公司
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