Processes for the purification and preparation of polyether polyols.

Abstract

DEPCT67 This invention relates to a purification process for polyether polyols prepared by... Polymer synthesis via the open-loop mechanism of alkylene oxide in the presence of an initiator containing a hydrogen atom. A number of active and complex cyanide-metal composite catalysts have a certain molecular weight. It has an average maximum molecular weight of 10,000 g / mol and contains ultra-high molecular weight (UHMW) components. The molecular weight must be at least three times the average molecular weight; the process involves filtration. Polyether polyols are constructed with membranes having average pore sizes ranging from 0.5 to 80 nanometers to produce liquids that... It is filtered using a purified polyether polyol with a reduced amount of UHMW component. Furthermore, the invention relates to a process for preparing polyether polyols from polyether polyols. The pure oil is then processed into polyurethane foam.

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