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US 7,008,900 B1Granted
Double metal cyanide catalysts for producing polyether polyols
AssigneeBayer Aktiengesellschaft
InventorsJörg Hofmann, Pieter Ooms, Pramod Gupta, Walter Schäfer, John Lohrenz
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Abstract
The invention provides new double metal cyanide (DMC) catalysts for preparing polyetherpolyols by the polyaddition of alkylene oxides to starter compounds which contain active hydrogen atoms, wherein the catalyst comprises a) double metal cyanide compounds, b) bile acids or their salts, esters or amides and c) organic complex ligands. The catalysts according to the invention show greatly increased activity during preparation of a polyetherpolyol.
Claims19
A double-metal cyanide catalyst comprising:
- a) at least one double-metal cyanide compound;
- b) at least one organic complex ligand which is not a bile acid, a bile acid salt, a bile acid ester or a bile acid amide;
- and
- c) at least one bile acid, bile acid salt, bile acid ester or bile acid amide.
1 more element
A double-metal cyanide catalyst comprising:
- a) at least one double-metal cyanide compound;
- b) at least one organic complex ligand which is not a bile acid, a bile acid salt, a bile acid ester or a bile acid amide;
- and
- c) at least one bile acid, bile acid salt, bile acid ester or bile acid amide, wherein the bile acid is represented by the formula:
- wherein
- R1, R2, R3, R4, independently, represent H or OH and
- R5 represents OH, NH—CH2—CH2—SO3H, NH—(CH2)3—N+(CH3)2—(CH2)3, —SO3, NH—(CH2)3—N+(CH3)2—CH2—CHOH—CH2—SO3− or NH—CH2—COOH.
4 more elements
Dependencies are inferred from the claim text.