Production method and application of p-phenylphenol

A technology for the production of p-phenylphenol, which is applied in chemical instruments and methods, the preparation of organic compounds, and the preparation of sulfonic acid, etc., which can solve the problems of high catalyst requirements, unstable sources, and large equipment investment, and achieve high product quality , low industrial cost and high yield

Pending Publication Date: 2022-03-22
合肥欧腾测控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a production method of p-phenylphenol and its application,

Method used

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  • Production method and application of p-phenylphenol
  • Production method and application of p-phenylphenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The production method of p-phenylphenol in the present embodiment is as follows:

[0065] 1. Sulfonation: Add 171.1kg of biphenyl (99%, 1.1kmol) to a 1000L enamel reaction kettle, raise the temperature to 100°C, and slowly drop 100kg (1.0kmol) of concentrated sulfuric acid with a content of 98% into the reaction kettle , the dropping time is 60 minutes, the temperature of the reaction material will rise during the dropping process, the reaction temperature is controlled at 110-120°C, and the temperature is raised to 130°C after the dropping is completed, and the temperature is kept for 2 hours to generate 4-phenylbenzenesulfonic acid; ℃, 0.001MPa, distill off the water and unreacted biphenyl formed by the reaction under reduced pressure.

[0066] 2, neutralization: the reaction liquid of step (1) is slowly added mass fraction and is in the sodium sulfite aqueous solution 529.2kg (with 1.05kmol) of 25%, neutralizes 4-phenylbenzenesulfonic acid, generates 4-phenylsulfonic...

Embodiment 2

[0072] The production method of p-phenylphenol in the present embodiment is as follows:

[0073] 1. Sulfonation: Add 186.7kg of biphenyl (99%, 1.2kmol) to a 1000L enamel reaction kettle, raise the temperature to 150°C, and slowly drop 100kg (1.0kmol) of concentrated sulfuric acid with a content of 98% into the reaction kettle , the dropping time is 60 minutes, the temperature of the reaction material will rise during the dropping process, and the reaction temperature is controlled at 135-150°C. After the dropping is completed, it is kept at 150°C for 1 hour to generate 4-phenylbenzenesulfonic acid; 0.005MPa, the water generated by the reaction and unreacted biphenyl were distilled off under reduced pressure.

[0074] 2. Neutralization: The reaction solution of step (1) is slowly added into 756 kg (with 1.2 kmol) of 20% sodium sulfite aqueous solution in mass fraction to neutralize 4-phenylbenzenesulfonic acid to generate sodium 4-phenylsulfonate and sulfur dioxide , collect t...

Embodiment 3

[0080] The production method of p-phenylphenol in the present embodiment is as follows:

[0081] 1. Sulfonation: Add 155.6kg of biphenyl (99%, 1.0kmol) to a 1000L enamel reaction kettle, raise the temperature to 120°C, and slowly drop 100kg (1.0kmol) of concentrated sulfuric acid with a content of 98% into the reaction kettle , the dropping time is 60 minutes, the temperature of the reaction material will rise during the dropping process, and the reaction temperature is controlled at 100-120°C. After the dropping is completed, it is kept at 90°C for 3 hours to generate 4-phenylbenzenesulfonic acid; 0.01MPa, the water and unreacted biphenyl produced by the reaction were distilled off under reduced pressure.

[0082] 2. Neutralization: the reaction solution of step (1) is slowly added into 924 kg (with 1.10 kmol) of 15% sodium sulfite aqueous solution in mass fraction to neutralize 4-phenylbenzenesulfonic acid to generate sodium 4-phenylsulfonate and sulfur dioxide , collect th...

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Abstract

The invention discloses a production method and application of p-phenylphenol, and the production method comprises the following steps: heating biphenyl and sulfuric acid to carry out sulfonation reaction, then neutralizing 4-phenylbenzenesulfonic acid in sulfonation reaction products by using sodium sulfite to generate sodium 4-phenylsulfonate and sulfur dioxide, collecting sulfur dioxide gas, cooling after the neutralization is finished, filtering, washing and drying to obtain p-phenylphenol. Filtering to obtain a sodium 4-phenylbenzenesulfonate solid; carrying out alkali fusion reaction on the sodium 4-phenylbenzenesulfonate solid and molten solid sodium hydroxide to generate sodium p-phenylphenolate and sodium sulfite; diluting the alkali fusion material with water, introducing collected sulfur dioxide for acidification reaction to generate p-phenylphenol and sodium sulfite, standing and separating to obtain crude p-phenylphenol and mother liquor, and finally rectifying to obtain p-phenylphenol. The method provided by the invention has the advantages of simple and easily available raw materials, good reaction atom economy, high yield, high product quality and low industrial cost, and is a feasible industrial production method of p-phenylphenol.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a production method and application of p-phenylphenol. Background technique [0002] p-Phenylphenol, English name: 4-Biphenylol, CAS number: 92-69-3, is an important intermediate of the fungicide biphenyltriazole, which can be used to make oil-soluble resins and emulsifiers, and used as corrosion resistance The components of lacquer, the carrier of printing and dyeing, etc.; the red light sensitization and green light sensitization dyes synthesized from it are one of the main raw materials of color film, and can also be used as analytical reagents. The p-phenylphenol preparation method of current literature report mainly contains following several kinds: [0003] Phenylphenol sulfonation method to produce phenol from distillation residue recovery method, diphenyl sulfone alkali fusion method, biphenyl sulfonation method, cyclohexanone and phenol synthesis method, etc....

Claims

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Application Information

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IPC IPC(8): C07C37/01C07C39/15C07C37/64C07C39/235C07C303/06C07C303/32C07C309/32
CPCC07C37/01C07C37/64C07C303/06C07C303/32C07C39/15C07C39/235C07C309/32
Inventor 任刚
Owner 合肥欧腾测控技术有限公司
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