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EP0102508A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for purifying crude polyether-polyols

Assignee: BASF SE
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Filing: 1983-07-27
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Granted: —
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Expires: 2003-07-27
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Abstract

Abstract Translated from German Zur Reinigung von rohen Polvether-polyolen, die durch anionische Polymerisation von Alkylenoxiden in Gegenwart von basischen Katalysatoren erhalten werden, werden diese mit Wasser und ortho-Phosphorsäure in bestimmten Mengenverhältnissen gemischt, danach wird der Reaktionsmischung ein Adsorptionsmittel einverleibt, die Reaktionsmischung filtriert und das Wasser aus dem Polyether-polyol abdestilliert. For the purification of crude polyether polyols, which are obtained by anionic polymerization of alkylene oxides in the presence of basic catalysts, these are mixed with water and orthophosphoric acid in certain proportions, then an adsorbent is added to the reaction mixture, the reaction mixture is filtered and the water is out distilled off the polyether polyol.

Inventors

  • 👤 Wolfgang Dr. Straehle
  • 👤 Raymond Dr. Denni
  • 👤 Matthias Dr. Marx

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 12:36
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/30

Claims Analysis

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References Cited (Backward Citations)

DE1495729B2 Cited
US4137398A Cited
DD142348A1 Cited
US4306943A Cited
EP0059368A1 Cited

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