TITANIUM-CONTAINING CATALYST COMPOSITION AND PROCESSES THEREFOR AND THEREWITH

摘要

This invention relates to a catalyst composition comprising an organic titanium compound, a complexing agent, a phosphorus source,, a solvent, and optionally a cocatalyst, a process for preparing the composition and use thereof in esterification, transesterification, polymerisation or combinations thereof. The complexing agent is selected from hydroxycarboxylic acids and aminocarboxylic acids, or combinations thereof, the phosphorus is selected from phosphonic acid, phosphinic acid, a phospine or combinations thereof. The cocatalyst can be a cobalt/aluminium catalyst, and antimony compound, or combinations thereof; a sulfonic acid may be present. In examples a composition of tetraisopropyl titanate, ethylene glycol, phenylphosphinic acid, p-toluenesulfonic acid and malic acid was used as polycondensation catalyst in the preparation of PET.