| 摘要 |
A carboxy-modified aluminum-based catalyst composition is of the general formula P(O)(OAlR'R'')<SUB>3 </SUB>or RP(O)(OAlR'R'')<SUB>2 </SUB>wherein O represents oxygen, P represents pentavalent phosphorous, Al represents aluminum, R comprises hydrogen, an alkyl group, or an aryl group, and R' and R'' independently comprise a halide, an alkyl group, a haloalkyl group, an alkoxy group, an aryl group, an aryloxy group, or a carboxy group, so long as at least one of R' and R'' is a carboxy group. The carboxy-modified aluminum-based catalyst composition is, generally, the reaction product of phosphoric acid or a pentavalent phosphonic acid, a tri-substituted aluminum compound, and a carboxylic acid.
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