公开(公告)号：MY137759A

公开(公告)日：2009-03-31

申请号：MYPI20034915

申请日：2003-12-19

Applicant: BASF AG

Inventor： BALDENIUS KAI-UWE DR ,  LAUTERBACH ARNULF DR ,  SEELMANN-EGGEBERT HANS-PETER DR

IPC: A23L29/00 ,  C08G65/20 ,  C08G65/26

Abstract: THE PRESENT INVENTION RELATES TO A PROCESS FOR PREPARING POLYOXYALKYLENE GLYCOL OF HIGH PURITY AND HAVING A LOW COLOR NUMBER FROM THE CORRESPONDING ALKYLENE GLYCOL AND A STARTER IN THE PRESENCE OF A BASIC CATALYST, WHEREIN A REDUCING AGENT IS PRESENT IN THE POLYMERIZATION.

公开(公告)号：MY136178A

公开(公告)日：2008-08-29

申请号：MYPI20042125

申请日：2004-06-02

Applicant: BASF AG

Inventor： KLUMPE MARKUS DR ,  BALDENIUS KAI-UWE DR ,  HACKMANN CLAUS DR ,  LAUTERBACH ARNULF DR ,  SEELMANN-EGGEBERT HANS-PETER DR ,  ZIPPLIES MATTHIAS DR

IPC: C08G65/30 ,  C08G65/26

Abstract: A PROCESS IS DESCRIBED FOR PURIFYING POLYALKYLENE GLYCOLS OBTAINED BY ADDING ALKYLENE OXIDE TO ALKYLENE GLYCOL, IN WHICH, AFTER ADDITION IS COMPLETE, THE RESULTANT POLYALKYLENE GLYCOL IS TREATED AT A PH OF >7 WITH A BLEACHING AGENT SELECTED FROM THE GROUP CONSISTING OF PEROXIDES, PERACIDS, PERCARBONATES, PERBORATES, PEROXODISULFATES OR OXYGEN, IN EACH CASE WITH OR WITHOUT ADDITION OF A BLEACHING ACTIVATOR.THE PROCESS IS SUITABLE IN PARTICULAR FOR PREPARING POLYETHYLENE GLYCOL HAVING MOLAR WEIGHTS FROM 196 TO 203 G/MOL WHICH MEETS REQUIREMENTS OF PHARMACOPEIAS.