Method for separating and refining phenol through leaching-phase separation-rectification coupling

A rectification coupling and phase separation technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of low utilization value of sodium salts, difficult solid waste treatment, and difficult resource utilization, etc. Simple operation, simple and easy separation operation, low energy consumption

Active Publication Date: 2020-09-22
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Method for separating and refining phenol through leaching-phase separation-rectification coupling

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The main process equipment is leaching equipment, solid-liquid separation equipment, liquid-liquid separation equipment, rectification equipment, etc.

[0045] A method for leaching-phase separation-rectification coupled separation and purification of phenol, in particular using acetone-water mixed solvent to leach and separate the solid mixture of sodium phenolate and sodium hydroxide, and then separate and refine through liquid-liquid phase separation and rectification operation Obtain phenol, make the method that sodium hydroxide and leaching agent can be recycled simultaneously, it is characterized in that described method step is as follows:

[0046] (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;

[0047](2) Sodium phenate leaching: In the leaching equipment, the acetone-water mixed solvent obtained in the pr...

Embodiment 2

[0055] The main process equipment is leaching equipment, solid-liquid separation equipment, liquid-liquid separation equipment, rectification equipment, etc.

[0056] A method for leaching-phase separation-rectification coupled separation and purification of phenol, in particular using acetone-water mixed solvent to leach and separate the solid mixture of sodium phenolate and sodium hydroxide, and then separate and refine through liquid-liquid phase separation and rectification operation Obtain phenol, make the method that sodium hydroxide and leaching agent can be recycled simultaneously, it is characterized in that described method step is as follows:

[0057] (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;

[0058] (2) Sodium phenate leaching: In the leaching equipment, the acetone-water mixed solvent obtained in the previous...

Embodiment 3

[0066] The main process equipment is leaching equipment, solid-liquid separation equipment, liquid-liquid separation equipment, rectification equipment, etc.

[0067] A method for leaching-phase separation-rectification coupled separation and purification of phenol, in particular using acetone-water mixed solvent to leach and separate the solid mixture of sodium phenolate and sodium hydroxide, and then separate and refine through liquid-liquid phase separation and rectification operation Obtain phenol, make the method that sodium hydroxide and leaching agent can be recycled simultaneously, it is characterized in that described method step is as follows:

[0068] (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;

[0069] (2) Sodium phenate leaching: In the leaching equipment, the acetone-water mixed solvent obtained in the previou...

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Abstract

The invention relates to a method for leaching and separating a solid mixture of sodium phenolate and sodium hydroxide by taking an acetone-water mixed solvent as a leaching agent and separating and refining phenol through leaching-phase separation-rectification coupling, and sodium hydroxide and the leaching agent are recycled while phenol is obtained through separation and refining. The separation method provided by the invention fully utilizes the characteristics of the separated substance system and the characteristics of the separation process, is simple and feasible in separation operation, low in operation cost and high in valuable component utilization rate, 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 leaching-phase separation-rectification coupled separation and purification of phenol, in particular using acetone-water mixed solvent to leach and separate the solid mixture of sodium phenate and sodium hydroxide, and then through liquid-liquid phase separation and rectification The method for obtaining phenol by operation, separation and purification, and at the same time enabling sodium hydroxide and leaching agent to be recycled belongs to the technical field of chemical separation. Background technique [0002] Usually, when phenol-containing materials are subjected to evaporation and dehydration treatment, in order to reduce the volatilization of phenol and protect the phenolic hydroxyl group so that it does not undergo chemical reactions, sodium hydroxide is added to the aqueous phenol solution to make phenol react with sodium hydroxide to produce non-volatile and stable chemical properties. of sodium phenat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/82C07C37/70C07C39/235C07C37/00C07C37/74C07C39/04
CPCC07C37/82C07C37/70C07C37/00C07C37/74C07C39/235C07C39/04
Inventor 王大为许文林
Owner YANGZHOU UNIV
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