Invention Grant
- Patent Title: High-purity polyalkylene glycols and preparation thereof
- Patent Title (中): 高纯度聚亚烷基二醇及其制备方法
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Application No.: US10857915Application Date: 2004-06-02
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Publication No.: US07164048B2Publication Date: 2007-01-16
- Inventor: Markus Klumpe , Kai-Uwe Baldenius , Claus Hackmann , Arnulf Lauterbach , Hans-Peter Seelmann-Eggebert , Matthias Zipplies
- Applicant: Markus Klumpe , Kai-Uwe Baldenius , Claus Hackmann , Arnulf Lauterbach , Hans-Peter Seelmann-Eggebert , Matthias Zipplies
- Applicant Address: DE Ludwigshafen
- Assignee: BASF Aktiengesellschaft
- Current Assignee: BASF Aktiengesellschaft
- Current Assignee Address: DE Ludwigshafen
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- Priority: DE10325264 20030603; DE10339184 20030826
- Main IPC: C07C29/74
- IPC: C07C29/74 ; C07C29/36
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.
Public/Granted literature
- US20050009695A1 High-purity polyalkylene glycols and preparation thereof Public/Granted day:2005-01-13
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