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US 2002/0177523 A1Published application
Double metal cyanide complex catalyst for producing polyol
AssigneeSK Evertec Co., Ltd.
InventorsIl Kim, Sang Hyun Lee
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Abstract
Disclosed is a double metal cyanide complex catalyst for producing polyol, which is produced by using monovalent alcohol and polyvalent alcohol as a complexing agent. The double metal cyanide complex catalyst has advantages in that when polyol is produced by an epoxide polymerization reaction, the amount of unsaturated polyol produced is small, catalyst activation time is short, and the production yield of polyol is increased, therefore there is no need to remove remaining catalyst from polyol after polymerization reaction.
Claims3
A double metal cyanide complex catalyst for producing polyol expressed by formula II:
- Ma[M′(CN)6]bLcL′d Formula II
- wherein, M and M′ are metal elements, L and L′ are complexing agents, and a, b, c, and d are integers with the proviso that a+b+c+d equals a sum of electrovalences of M and M′;
- M is selected from the group consisting of Zn (II), Fe (II), Ni (II), Mn (II), Co (II), Sn (II), Pb (II), Fe (III), Mo (IV), Mo (VI), Al (II), V M, V (IV), Sr (II), W (IV), W (VI), Cu (II), and Cr (III);
- M′ is selected from the group consisting of Fe (II), Fe (III), Co (II), Co (III), Cr (II), Cr (III), Mn (II), Mn (III), Ir (III), Ni (II), Rh (III), Ru (II), V (V), and V (IV);
- L is monovalent alcohol, and
- L′ is polyvalent alcohol.
3 more elements
Dependencies are inferred from the claim text.