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Alkali fusion tubular reactor for resorcinol and method for continuously producing resorcinol by using sulfur trioxide

A tubular reactor, resorcinol base technology, applied in chemical/physical/physical chemical fixed reactors, chemical instruments and methods, chemical/physical/physical chemical processes using energy, etc., can solve the problem of increasing three wastes Difficult to deal with, difficult to deal with sodium sulfate, large environmental pollution and other problems, to achieve good environmental protection effect, saving reaction steps, high heating efficiency

Pending Publication Date: 2020-08-21
哈密盛典科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]The benzene sulfonation alkali fusion method uses benzene as the starting material, the process conditions are simple, and the technology is mature. It is the main production process in China at present, but the environmental pollution is serious
In the production process of the product, a large amount of strong acid and strong alkali are required, and a large amount of inorganic salts Na2S04, Na2SO3(Traditional process uses oleum for monosulfonation reaction, neutralization uses sodium hydroxide, acidification uses dilute sulfuric acid or hydrochloric acid, resulting in a large amount of sodium sulfate or sodium chloride by-products, sodium sulfate is not good treatment, increasing the difficulty of the three wastes treatment), the environmental pressure is relatively high

Method used

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  • Alkali fusion tubular reactor for resorcinol and method for continuously producing resorcinol by using sulfur trioxide
  • Alkali fusion tubular reactor for resorcinol and method for continuously producing resorcinol by using sulfur trioxide

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Embodiment 1

[0033] Such as figure 1 As shown, the resorcinol alkali fusion tubular reactor of the present invention includes a tubular reactor body 1, and the tubular reactor body 1 is made of an electrical conductor, such as the tubular reactor body 1 is made of a nickel alloy material. The tubular reactor body 1 is wound with an electromagnetic coil 101, and the stirring rod of the magnetic stirrer 102 is installed in the tubular reactor body 1 along the axial direction of the tubular reactor body, and the stirring rod is provided with stirring blades. The feed end of the tubular reactor body 1 is provided with a disulfonation product feed pipe 103 and an alkali melt feed pipe 104 , and the discharge end of the tubular reactor body 1 is provided with an alkali melt product discharge pipe 105 . The caustic soda is first heated and melted in the kettle, and then enters the alkali fusion tubular reactor from the alkali melt feed pipe 104.

[0034] The resorcinol production system includes...

Embodiment 2

[0041] Method for continuous production of resorcinol using sulfur trioxide

[0042] Turn on the jacket cooling water of a sulfonation tubular reactor, and feed benzene and sulfur trioxide. The molar ratio of sulfur trioxide to benzene is 1.05:1, and the temperature in the pipeline is controlled between 30-40°C. It takes 0.5-1h to pass through the reactor, and then flows into a sulfonation buffer tank.

[0043] Then transfer to the disulfonation reactor, feed sulfur trioxide into the disulfonation reactor at a rate of 0.5-0.8t / h for disulfonation to obtain m-benzenedisulfonic acid, the reaction temperature is 160°C, sulfur trioxide and The molar ratio of benzene is 1.05:1.

[0044] Add sodium hydroxide into the alkali fusion kettle and heat it to 330°C to melt the sodium hydroxide to obtain an alkali solution.

[0045] Then the disulfonated liquid and the alkali melt are controlled according to the feed flow rate of the disulfonated liquid is 1-1.5t / h, the feed flow rate of...

Embodiment 3

[0048] Method for continuous production of resorcinol using sulfur trioxide

[0049] Open the jacket cooling water of the tubular reactor, and feed benzene and sulfur trioxide. The molar ratio to benzene is 1.2:1, and the temperature in the pipeline is controlled between 30-40°C. After passing through the reactor for 0.5-1h, it flows into a sulfonation buffer tank.

[0050] Then transfer to the disulfonation reactor, and then pass sulfur trioxide into the disulfonation reactor at a rate of 0.5-0.8t / h for disulfonation to obtain m-benzenedisulfonic acid. The reaction temperature is 160°C. The molar ratio to benzene is 1.2:1.

[0051] Add sodium hydroxide into the alkali fusion kettle and heat it to 330°C to melt the sodium hydroxide to obtain an alkali solution.

[0052] Then the disulfonated liquid and the alkali melt are controlled according to the feed flow rate of the disulfonated liquid is 1-1.5t / h, the feed flow rate of the alkali melt is 1.2-2t / h, and the molar ratio ...

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Abstract

The invention discloses an alkali fusion tubular reactor for resorcinol and a method for continuously producing resorcinol by using sulfur trioxide. The alkali fusion tubular reactor for resorcinol comprises a tubular reactor body, wherein the tubular reactor body is made of an electric conductor; an electromagnetic coil is wound outside the tubular reactor body; a stirring rod of the magnetic stirrer is arranged in the tubular reactor body; a disulfonation product feeding pipe and an alkali fusion liquid feeding pipe are arranged at the feeding end of the tubular reactor body; and an alkali fusion product discharging pipe is arranged at the discharging end of the tubular reactor body. The method for continuously producing resorcinol by using sulfur trioxide comprises the steps of primarysulfonation, secondary sulfonation, alkali fusion, dilution and acidification. The method can reduce the amount of residues, lowers treatment cost, is economical and environment-friendly, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a resorcinol alkali fusion tube reactor and a method for continuously producing resorcinol by using sulfur trioxide, belonging to the technical field of chemical production. Background technique [0002] Resorcinol is a widely used fine organic chemical raw material, which plays an extremely important role in the fields of agriculture, dyes, paints, medicines, plastics, rubber and electronic chemicals. In the field of medicine, resorcinol has a certain bactericidal effect, which can treat skin diseases caused by fungi or be used as an intestinal disinfectant. In addition, resorcinol is also an important pharmaceutical intermediate. For example, it is an anti-tuberculosis drug against Starting material for aminosalicylic acid drug. [0003] At present, the international companies that can produce more than 10,000 tons per year include American Indor Spec Chemical Company and Japan Sumitomo Chemical. In 2004, the domestic consu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/08B01J19/18C07C37/04C07C39/08
CPCB01J19/087B01J19/1812B01J19/0053C07C37/04C07C303/06B01J2219/00033B01J2219/00094C07C39/08C07C309/29
Inventor 乐金波张泉森高晶何彪高天庆
Owner 哈密盛典科技有限公司
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