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A method of leaching-evaporation-phase separation coupled separation and recovery of phenol

A separation recovery 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 salt, difficult solid waste treatment, and difficult resource utilization, etc. Simple, easy separation operation, high utilization effect

Active Publication Date: 2022-03-25
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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  • A method of leaching-evaporation-phase separation coupled separation and recovery of phenol

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Experimental program
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Effect test

Embodiment 1

[0042] The main process equipment is leaching equipment, solid-liquid separation equipment, evaporation equipment, liquid-liquid separation equipment, etc.

[0043] A method for leaching-evaporation-phase separation coupled separation and recovery of phenol, in particular, using acetone-water mixed solvent as the leaching agent to leaching and separating the solid mixture of sodium phenate and sodium hydroxide, followed by evaporation and liquid-liquid phase separation to obtain Phenol, the method that sodium hydroxide, acetone, water are recycled simultaneously is characterized in that described method step is as follows:

[0044] (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;

[0045] (2) Sodium phenate leaching: In the leaching equipment, the acetone-water mixed solvent obtained in the previous step is used as a leaching ag...

Embodiment 2

[0054] The main process equipment is leaching equipment, solid-liquid separation equipment, evaporation equipment, liquid-liquid separation equipment, etc.

[0055] A method for leaching-evaporation-phase separation coupled separation and recovery of phenol, in particular, using acetone-water mixed solvent as the leaching agent to leaching and separating the solid mixture of sodium phenate and sodium hydroxide, followed by evaporation and liquid-liquid phase separation to obtain Phenol, the method that sodium hydroxide, acetone, water are recycled simultaneously is characterized in that described method step is as follows:

[0056] (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;

[0057] (2) Sodium phenate leaching: In the leaching equipment, the acetone-water mixed solvent obtained in the previous step is used as a leaching age...

Embodiment 3

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

[0067] A method for leaching-evaporation-phase separation coupled separation and recovery of phenol, in particular, using acetone-water mixed solvent as the leaching agent to leaching and separating the solid mixture of sodium phenate and sodium hydroxide, followed by evaporation and liquid-liquid phase separation to obtain Phenol, the method that sodium hydroxide, acetone, water are recycled simultaneously is characterized in that described method step is as follows:

[0068] (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;

[0069] (2) Sodium phenate leaching: In the leaching equipment, the acetone-water mixed solvent obtained in the previous step is used as a leach...

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Abstract

The invention relates to a method for leaching-evaporation-phase separation coupled separation and recovery of phenol, in particular using acetone-water mixed solvent as the leaching agent to leaching and separating the solid mixture of sodium phenate and sodium hydroxide, and then evaporating, liquid-liquid Phase separation to obtain phenol, while sodium hydroxide, acetone, and water can be recycled. The separation method of the present invention makes full use of the characteristics of the separated species and the characteristics of the separation process. Not only is the separation operation simple and easy, and the operation cost is low, but also other materials can be recovered and utilized as resources while separating and obtaining phenol. The process technology not only has industrial application value, but also has significant economic and social benefits.

Description

technical field [0001] The invention relates to a method for leaching-evaporation-phase separation coupled separation and recovery of phenol, in particular using acetone-water mixed solvent as the leaching agent to leaching and separating the solid mixture of sodium phenate and sodium hydroxide, and then evaporating, liquid-liquid Phase separation method to obtain phenol. The separation method can recycle sodium hydroxide, acetone and water while obtaining phenol, and 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, it is necessary to add sodium hydroxide to the aqueous phenol solution to make phenol react with sodium hydroxide to form non-volatile and chemical properties. Stabilized sodium phenate. Simultan...

Claims

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Application Information

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