Process for preparing polyether polyols

Details Process for preparing polyether polyols Process for preparing polyether polyols

2006-03-21

2006-03-21

Keys, Rosalynd (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S618000, C568S620000, C568S622000, C568S623000, C568S624000, C568S625000, C568S679000, C502S125000, C502S200000

Reexamination Certificate

active

07015364

ABSTRACT:
A process for preparing polyether polyols includes a precipitation step, a recrystallization step, and a reaction step. In the precipitation step, a multimetal cyanide compound is precipitated by reaction of a metal salt with a cyanometalate compound. In the recrystallization step, the multimetal cyanide compound precipitated above is recrystallized by adding further metal salt and/or further cyanometalate compound. The recrystallization forms a multimetal cyanide catalyst compound. In the reaction step, an initiator and one or more alkylene oxide are reacted in the presence of the multimetal cyanide catalyst compound.

REFERENCES:
patent: 5158922 (1992-10-01), Hinney et al.
patent: 5470813 (1995-11-01), Le-Khac
patent: 5777177 (1998-07-01), Pazos
patent: 5919988 (1999-07-01), Pazos et al.
patent: 6018017 (2000-01-01), Le-Khac
patent: 6388048 (2002-05-01), Laycock et al.
patent: 6391820 (2002-05-01), Ooms et al.
patent: 6429342 (2002-08-01), Clement et al.
patent: 6613714 (2003-09-01), Grosch et al.
patent: 19834572 (2000-02-01), None
patent: 0755716 (1997-01-01), None
patent: WO97/23544 (1997-07-01), None
patent: WO 01/04183 (2001-01-01), None
PCT International Search Report dated Jul. 10, 2001.

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