RU2001124862A - DOUBLE METALCYANIDE CATALYSTS FOR PRODUCING POLYESTER POLYOLS - Google Patents

Claims (11)

1. A double metal cyanide catalyst (DMC) that contains a) one or more double metal cyanide compounds, b) one or more bile acids or their salts, esters or amides, and c) one or more organic complex ligands other than b) . 2. The DMC catalyst according to claim 1, which further comprises d) water and / or e) a water-soluble metal salt. 3. The DMC catalyst according to claim 1 or 2, wherein the double metal cyanide compound a) is zinc hexacyanocobaltate (III). 4. DMC catalyst according to one of claims 1 to 3, in which the organic complex ligand c) is tert-butanol. 5. DMC catalyst according to one of claims 1 to 4, which contains 1-80 wt.% Bile acid or its salt, ester or amide. 6. DMC catalyst according to one of claims 1 to 5, in which bile acid has the general formula

where R ₁ , R ₂ , R ₃ and R ₄ independently of one another are hydrogen or hydroxy; R ₅ is hydroxy, NH-CH ₂ —COOH, NH — CH ₂ —CH ₂ —SO ₃ H, NH— (CH ₂ ) ₃ —N ⁺ (CH ₃ ) ₂ —CH ₂ —CHOH — CH ₂ —SO ₃ ^- or NH- (CH ₂ ) ₃ -N ⁺ (CH ₃ ) ₂ - (CH ₂ ) ₃ -SO ₃ ^- . 7. The DMC catalyst according to one of claims 1 to 6, wherein the catalyst as a bile acid salt contains a salt of sodium, lithium or potassium cholic acid, glycocholic acid, taurocholic acid, deoxycholic acid, glycodeoxycholic acid, taurodeoxycholic acid, chenodeoxycholic acid, glyco-chenodeoxydeoxy acids, taurochenodeoxycholic acid, lithocholic acid, hypocholic acid, hyodeoxycholic acid, or a mixture thereof. 8. The method for producing a DMC catalyst according to one of claims 1 to 7, which includes the following stages: i) interaction in an aqueous solution of α) metal salts with metal cyanide salts, β) organic complex ligands that differ from bile acids or their salts esters or amides, and γ) bile acids or their salts, esters or amides, ii) isolation, washing and drying of the catalyst obtained in stage i). 9. The method of producing polyether polyols by polyaddition of alkylene oxides to the starting materials with active hydrogen atoms, in the presence of one or more DMC catalysts according to one of claims 1 to 7. 10. The polyether polyol obtained by the method according to claim 9. 11. The use of one or more DMC catalysts according to one of claims 1 to 7 for producing polyether polyols by polyaddition of alkylene oxides to starting materials with active hydrogen atoms.