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Method for separating sodium phenolate and sodium hydroxide solid mixture and recovering phenol by toluene extraction separation

A sodium hydroxide, separation and recovery technology, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of low sodium salt use value, difficult solid waste treatment, difficult resource utilization, etc., to achieve Simple operation, easy separation operation, and low energy consumption

Active Publication Date: 2020-10-16
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) A prominent problem still existing in this treatment method is that the added acid reacts with sodium hydroxide to produce sodium salt, which has low utilization value and is difficult to be recycled as a resource. Usually, it can only be treated as waste for solid waste treatment, and the sodium salt Solid waste treatment is also more difficult

Method used

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  • Method for separating sodium phenolate and sodium hydroxide solid mixture and recovering phenol by toluene extraction separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The main process equipment is leaching equipment, solid-liquid separation equipment, evaporation equipment, extraction equipment, rectification equipment, etc.

[0053] A method for separating the solid mixture of sodium phenate and sodium hydroxide and extracting and recovering phenol with toluene, especially using acetone-water mixed solvent as the leaching agent and toluene as the extraction agent, and adopting leaching-extraction-rectification coupling technology for separation and recovery The method for phenol, while separating and obtaining phenol, realizes the recycling of sodium hydroxide, lixiviating agent, extraction agent, is characterized in that described method step is as follows:

[0054] (1) preparation of leaching agent: mixing acetone and water, the volume ratio of water and acetone in the obtained leaching agent is 10.0:100, and this solvent enters the next step as leaching agent;

[0055] (2) Sodium phenate leaching: In the leaching equipment, the a...

Embodiment 2

[0065] The main process equipment is leaching equipment, solid-liquid separation equipment, evaporation equipment, extraction equipment, rectification equipment, etc.

[0066] A method for separating the solid mixture of sodium phenate and sodium hydroxide and extracting and recovering phenol with toluene, especially using acetone-water mixed solvent as the leaching agent and toluene as the extraction agent, and adopting leaching-extraction-rectification coupling technology for separation and recovery The method for phenol, while separating and obtaining phenol, realizes the recycling of sodium hydroxide, lixiviating agent, extraction agent, is characterized in that described method step is as follows:

[0067] (1) preparation of leaching agent: mixing acetone and water, the volume ratio of water and acetone in the obtained leaching agent is 1.0:100, and this solvent enters the next step as leaching agent;

[0068] (2) Sodium phenate leaching: In the leaching equipment, the ac...

Embodiment 3

[0078] The main process equipment is leaching equipment, solid-liquid separation equipment, evaporation equipment, extraction equipment, rectification equipment, etc.

[0079] A method for separating the solid mixture of sodium phenate and sodium hydroxide and extracting and recovering phenol with toluene, especially using acetone-water mixed solvent as the leaching agent and toluene as the extraction agent, and adopting leaching-extraction-rectification coupling technology for separation and recovery The method for phenol, while separating and obtaining phenol, realizes the recycling of sodium hydroxide, lixiviating agent, extraction agent, is characterized in that described method step is as follows:

[0080] (1) preparation of leaching agent: acetone and water are mixed, and the volume ratio of water and acetone in the obtained leaching agent is 5.0:100, and this solvent enters the next step as leaching agent;

[0081] (2) Sodium phenate leaching: In the leaching equipment,...

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Abstract

The invention relates to a method for separating a sodium phenolate and sodium hydroxide solid mixture and recovering phenol by toluene extraction separation. Particularly, an acetone-water mixed solvent is used as a leaching agent, methyl benzene is used as an extracting agent, a leaching-extraction-rectification coupled technology is adopted for separating and recovering phenol, and cyclic utilization of sodium hydroxide, the leaching agent and the extracting agent is achieved while phenol is obtained through separation. The separation method fully utilizes the characteristics of a separatedmaterial system and the characteristics of the separation process, is simple and feasible in separation operation, low in operation cost, high in material utilization rate, clean and environment-friendly, and is a clean production method meeting the development requirements of green chemical industry.

Description

technical field [0001] The invention relates to a method for separating sodium phenate and sodium hydroxide solid mixture and extracting and recovering phenol with toluene, especially using acetone-water mixed solvent as leaching agent and toluene as extracting agent, adopting leaching-extraction-rectification coupling The method for separating and recovering phenol by technology, realizes the recycling of sodium hydroxide, leaching agent and extraction agent while separating and obtaining phenol, and belongs to the technical field of chemical separation. Background technique [0002] The solid mixture of sodium phenate and sodium hydroxide is a material obtained by the reaction of phenol and sodium hydroxide to form sodium phenate, which is then evaporated and dried when the phenol-containing material is treated with sodium hydroxide. Usually, when phenol-containing materials are subjected to evaporation and dehydration treatment, in order to reduce the volatilization of ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/04C07C37/68C07C37/72C07C37/74C07C37/055
CPCC07C37/68C07C37/72C07C37/74C07C37/055C07C37/82C07C39/04
Inventor 许文林陈栋贾全保刘枫王雅琼
Owner YANGZHOU UNIV
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