A method for washing out of polyhydric phenols of the pressure gasification gas and extraction of these phenols from the wash water

摘要

Mono and polyvalent phenols are recovered from gasified coal by scrubbing the phenol-containing gas with water, separating the extracted phenols into a monovalent phenol rich fraction and a polyvalent phenol rich fraction and recovering the monovalent phenols separately from the polyvalent phenols by solvent extraction.