C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 65/30 (2006.01)
Patent
CA 2165140
A process for removing a pH-basic material from a polyether polyol polymerizate in which a polymerizate containing polyether and an alkaline material is combined with water and, if the difference between the specific gravity of the polymerizate and water is less than 0.1, an inorganic salt at a temperature and under conditions such that an emulsion forms. No organic solvent is required. The emulsion is heated to a temperature of from about 90 to about 150°C. The heated emulsion is then passed through a coalescing medium at a rate such that the residence time is sufficient to separate the emulsion into an aqueous phase containing the pH-basic material and an organic phase containing a polyether polyol which is substantially free of pH-basic material.
Balister David A.
Kratz Mark R.
Newman Lewis S.
Solomon Mark S.
Steitle Richard B.
Corporation Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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