公开(公告)号：US08618334B2

公开(公告)日：2013-12-31

申请号：US12809257

申请日：2008-12-16

Applicant: Marleen Horsels ,  Rudy Francols Marla Jozef Parton ,  Johan Thomas Tinge

Inventor： Marleen Horsels ,  Rudy Francols Marla Jozef Parton ,  Johan Thomas Tinge

IPC: C08G8/10 ,  B01D3/10 ,  B01D3/32 ,  B01J19/32

CPC classification number: C07C29/50 ,  C07C45/006 ,  C07C45/82 ,  C07C51/00 ,  C07C2601/14 ,  C07C49/403 ,  C07C55/14 ,  C07C35/08

Abstract: Methods for continuously preparing cyclohexanone from phenol make use of a catalyst having at least one catalytically active metal selected from platinum and palladium. The process includes enriching phenol in a distillation fraction as compared to a subsequent fraction, wherein the subsequent fraction includes phenol and side-products having a higher boiling point than phenol. Distillation is carried out in a vacuum distillation column equipped with trays in the lower part of the column. In an upper part of the column, i.e., in the part above the feed inlet, packing material is present instead of trays in at least part thereof. The packing material has a comparable or improved separating efficiency, and provides a reduction of the pressure drop by at least 30%, preferably more than 50%, as compared to the case with trays in the upper part, under otherwise similar distillation conditions.

Abstract translation: 从苯酚连续制备环己酮的方法使用具有至少一种选自铂和钯的催化活性金属的催化剂。 该方法包括与后续馏分相比富集蒸馏馏分中的苯酚，其中后续馏分包括苯酚和沸点高于苯酚的副产物。 蒸馏在塔底部装有塔板的真空蒸馏塔中进行。 在塔的上部，即在进料入口上方的部分，在其至少一部分中存在填料材料代替托盘。 包装材料具有相当或改进的分离效率，并且与其他类似的蒸馏条件下的上部塔板的情况相比，提供压降降低至少30％，优选大于50％。