Zinc/metal hexacyanocobaltate complex compounds, a process for their preparation, and their use in a process for the production of polyether polyols

US5998327A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jörg Hofmann · Krefeld, DE
• Pramod Gupta · Bedburg, DE
• Harald Pielartzik · Pittsburgh, US
• Pieter Ooms · Krefeld, DE
• Walter Schafer · Leichlingen, DE

Key dates

• Filing date: Jul 13, 1998
• Grant date: Dec 7, 1999
• Expiry date: Jul 13, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to novel zinc/metal hexacyanocobaltate complex compounds corresponding to the formula: EQU Zn.sub.3-v M.sub.v [Co(CN).sub.6 ].sub.2.w(H.sub.2 O).x(L).y[Zn(X).sub.n ].z[M(Y).sub.m)]. These complex compounds are suitable catalysts. This invention also relates to a process for the production of the compounds, and to the use of the compounds in a process for the production of polyether polyols. These novel zinc/metal hexacyanocobaltate complex compounds when used as catalysts in a process for the production of polyether polyols substantially reduce the induction period of the polyaddition reaction of alkylene oxides to starter compounds containing hydrogen atoms. Furthermore, the resultant polyether polyols have a significantly narrower molecular weight distribution.