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A kind of leaching separation method of sodium phenate and sodium hydroxide solid mixture

A sodium hydroxide and separation method technology, applied in the preparation of organic compounds, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problems of difficult solid waste treatment, low sodium salt utilization value, and difficult resource recovery Utilization and other issues to achieve the effect of high utilization rate of materials, reasonable process and low operating cost

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

Method used

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  • A kind of leaching separation method of sodium phenate and sodium hydroxide solid mixture

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The main process equipment is leaching equipment, solid-liquid separation equipment and evaporation equipment.

[0044] A method for leaching and separating the solid mixture of sodium phenate and sodium hydroxide, in particular, a coupling technology of leaching, solid-liquid separation, and evaporation desolventization, using acetone-water mixed solvent as the leaching agent for leaching and separating sodium phenate and the separation method of the solid mixture of sodium hydroxide, when separating and obtaining sodium phenate and sodium hydroxide, the leaching agent is also recycled, and it is characterized in that the method steps are as follows:

[0045] (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;

[0046] (2) Sodium phenate is leached: in the leaching equipment, the acetone-water mixed solvent obtained in the p...

Embodiment 2

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

[0055] A method for leaching and separating the solid mixture of sodium phenate and sodium hydroxide, in particular, a coupling technology of leaching, solid-liquid separation, and evaporation desolventization, using acetone-water mixed solvent as the leaching agent for leaching and separating sodium phenate and the separation method of the solid mixture of sodium hydroxide, when separating and obtaining sodium phenate and sodium hydroxide, the leaching agent is also recycled, and it is characterized in that the method steps are as follows:

[0056] (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;

[0057] (2) Sodium phenate is leached: in the leaching equipment, the acetone-water mixed solvent obtained i...

Embodiment 3

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

[0066] A method for leaching and separating the solid mixture of sodium phenate and sodium hydroxide, in particular, a coupling technology of leaching, solid-liquid separation, and evaporation desolventization, using acetone-water mixed solvent as the leaching agent for leaching and separating sodium phenate and the separation method of the solid mixture of sodium hydroxide, when separating and obtaining sodium phenate and sodium hydroxide, the leaching agent is also recycled, and it is characterized in that the method steps are 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 10.0:100, and this solvent enters the next step as leaching agent;

[0068] (2) Sodium phenate is leached: in the leaching equipment, the acetone-water mixed solvent obtained in the ...

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Abstract

The invention relates to a leaching and separation method for a solid mixture of sodium phenate and sodium hydroxide, in particular to a method of leaching, solid-liquid separation, and evaporation-desolvent coupling technology, using acetone-water mixed solvent as the leaching agent. In the separation method for separating the solid mixture of sodium phenate and sodium hydroxide, the leaching agent can also be recycled while the sodium phenate and sodium hydroxide are separated. 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 invention relates to a leaching and separation method for a solid mixture of sodium phenate and sodium hydroxide, in particular to a coupling technology of leaching, solid-liquid separation, evaporation and desolventization, using acetone-water mixed solvent as the leaching agent. The invention discloses a separation method for separating the solid mixture of sodium phenate and sodium hydroxide. When the sodium phenate and sodium hydroxide are separated and obtained, the leaching agent is also 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 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/82C07C37/70C07C37/66C07C39/235C01D1/34
CPCC07C37/82C07C37/70C07C37/66C01D1/34C07C39/235
Inventor 许文林陈栋贾全保李冰涛王雅琼
Owner YANGZHOU UNIV
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