Titanium-containing catalyst composition and processes...

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B01J 31/12 (2006.01) B01J 31/26 (2006.01) C08G 63/82 (2006.01) C08G 63/85 (2006.01) B01J 21/06 (2006.01)

Patent

CA 2366946

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.

L'invention concerne une composition de catalyseur comprenant un composant de titane organique, un agent complexant, une source de phosphore, un solvant et éventuellement un co-catalyseur. L'invention concerne également un procédé de préparation et d'utilisation de cette composition dans des processus d'estérification, de transestérification, de polymérisation ou des combinaisons de ces derniers. L'agent complexant est sélectionné dans les acides hydroxycarboxyliques, les acides aminocarboxyliques ou des combinaisons de ces derniers, le phosphore est sélectionné parmi l'acide phosphonique, l'acide phosphinique, une phosphine ou des combinaison de ces derniers. Le co-catalyseur peut être un catalyseur cobalt/aluminium, un composé antimoine ou des combinaison de ces derniers. La composition peut en outre comprendre un acide sulfonique. Parmi les exemples on peut citer l'utilisation d'une composition de titanate de tétra isopropyle, d'éthylène glycol, d'acide phénylphosphinique, d'acide p-toluène-sulfonique et d'acide malique en tant que catalyseur de polycondensation dans la préparation de PET.

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