公开(公告)号：USH2194H1

公开(公告)日：2007-07-03

申请号：US10811220

申请日：2004-03-26

申请人： Grant James Lund ,  Edward John Coogan ,  Wilhelmina Jansen

发明人： Grant James Lund ,  Edward John Coogan ,  Wilhelmina Jansen

IPC分类号： B01D11/00 ,  B01D3/00

摘要： This invention relates to a process for the purification of phenols in a feedstock containing phenols and neutral oils and/or tar bases. The process includes liquid-liquid extraction of feedstock using a solvent and a counter-solvent, and separating the resulting solvent and counter-solvent layers. Phenols are then recovered from the separated solvent layer, and counter-solvent is recovered form the counter-solvent layer. The process also includes at least one of the following additions steps i) subjecting the separated solvent layer to distillation at atmospheric pressure; ii) subjecting the separated solvent layer to distillation, recovering an organic phase from the overheads product of the distillation step and recycling it to the liquid-liquid extraction step; and iii) recovering solvent from the counter-solvent layer.