Method for separating phenolic substances in medium-low temperature coal tar
A technology of low-temperature coal tar and phenolic substances, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as unfavorable environmental protection, complexity, and large amount of wastewater
Active Publication Date: 2020-10-30
CHAMBROAD CHEM IND RES INST CO LTD
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Abstract
The invention belongs to the field of separation and purification technologies in the chemical industry and particularly relates to a method for separating phenolic substances from medium and low temperature coal tar. A two-step extraction separation process is adopted, and phenolic substances with the purity being greater than 99% are separated. The method comprises the following specific steps of: mixing medium and low temperature coal tar with a mixed extraction agent, settling to obtain a phenol-rich component, enabling the phenol-rich component to enter an extraction tower, enabling heavycomponents at the tower bottom to enter a recovery tower 2, enabling a tower top component of the recovery tower 2 to enter a recovery tower 3, and enabling a tower bottom component of the recovery tower 3 to be the phenol substances. The separation process provided by the invention has the advantages of simple operation conditions, low extraction agent price, stable properties, low equipment investment and energy consumption, high phenol recovery rate, recyclable extraction agent and no generation of three wastes.
Application Domain
Organic chemistryOrganic compound preparation +1
Technology Topic
PhysicsChemical industry +7
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