| 摘要 |
The invention comprises a catalyst composition comprising the reaction product of a phosphonate-functionalised polyorganosiloxane containing at least one P-OR group, where R is hydrogren, an alkyl, cycloalkyl, aryl or alkyl-aryl radical which may be substituted with hydrocarbyl or non-hydrocarbyl substituents or an optionally complexed metal ion, and a compound of a metal selected from the group consisting of titanium, zinc, tin, magnesium, germanium, zirconium, aluminium, hafnium, an alkali metal, alkaline earth metal, rhodium, palladium, platinum, gold and silver. The supporter catalyst is useful in a number of chemical processes, e.g. esterification processes. |
