A method for leaching-crystallization coupling separation of solid mixture of sodium phenate and sodium hydroxide

A technology of sodium hydroxide and sodium phenolate, which is applied in the preparation of organic compounds, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problem of low utilization value of sodium salts, difficult solid waste treatment, and difficulty in recycling Use and other problems to achieve the effect of reasonable process, high utilization rate of materials, and low operating cost

Active Publication Date: 2022-03-25
YANGZHOU UNIV
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  • 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 for leaching-crystallization coupling separation of solid mixture of sodium phenate and sodium hydroxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The main process equipment is leaching equipment, solid-liquid separation equipment and crystallization equipment.

[0043] A method for leaching-crystallization coupled separation of solid mixtures of sodium phenate and sodium hydroxide, especially a method of using acetone-water mixed solvent as leaching agent, leaching-cooling crystallization coupling separation of solid mixtures of sodium phenate and sodium hydroxide Method, when this separation method is separated to obtain sodium phenate and sodium hydroxide, the leaching agent is also recycled, and it is characterized in that the method steps are as follows:

[0044] (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;

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

Embodiment 2

[0053] The main process equipment is leaching equipment, solid-liquid separation equipment and crystallization equipment.

[0054] A method for leaching-crystallization coupled separation of solid mixtures of sodium phenate and sodium hydroxide, especially a method of using acetone-water mixed solvent as leaching agent, leaching-cooling crystallization coupling separation of solid mixtures of sodium phenate and sodium hydroxide Method, when this separation method is separated to obtain sodium phenate and sodium hydroxide, the leaching agent is also recycled, and it is characterized in that the method steps are as follows:

[0055] (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;

[0056] (2) Sodium phenate is leached: in the leaching equipment, the acetone-water mixed solvent obtained in the previous step is used as a leaching a...

Embodiment 3

[0064] The main process equipment is leaching equipment, solid-liquid separation equipment and crystallization equipment.

[0065] A method for leaching-crystallization coupled separation of solid mixtures of sodium phenate and sodium hydroxide, especially a method of using acetone-water mixed solvent as leaching agent, leaching-cooling crystallization coupling separation of solid mixtures of sodium phenate and sodium hydroxide Method, when this separation method is separated to obtain sodium phenate and sodium hydroxide, the leaching agent is also recycled, and it is characterized in that the method steps are as follows:

[0066] (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;

[0067] (2) Sodium phenate leaching: In the leaching equipment, the acetone-water mixed solvent obtained in the previous step is used as a leaching agen...

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Abstract

The present invention relates to a method for leaching-crystallization coupling separation of sodium phenate and sodium hydroxide solid mixture, in particular to a method of using acetone-water mixed solvent as leaching agent, leaching-cooling crystallization coupling separation of sodium phenate and sodium hydroxide The method of the solid mixture, when the separation method separates and obtains sodium phenate and sodium hydroxide, the leaching agent is also recycled. The separation method of the present invention has the advantages of reasonable process, simple operation, low operation cost and high utilization rate of materials, and is a clean production method meeting the development requirements of green chemical industry.

Description

technical field [0001] The present invention relates to a method for leaching-crystallization coupled separation of sodium phenate and sodium hydroxide solid mixture, in particular to a method of using acetone-water mixed solvent as leaching agent, leaching-cooling crystallization coupling separation of sodium phenate and sodium hydroxide The method for the solid mixture, in the separation method, while obtaining sodium phenate and sodium hydroxide, the leaching agent can also be recycled, 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 phenol and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/235C07C37/68C07C37/82C07C37/84C01D1/34
CPCC07C37/68C07C37/82C07C37/84C07C37/685C01D1/34C07C39/235
Inventor 许文林陈栋贾全保吴栓王雅琼
Owner YANGZHOU UNIV
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