Improvements relating to metal-compound catalysed processes

B - Operations – Transporting – 01 – J

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B01J 35/00 (2006.01) B01J 8/20 (2006.01) C07C 67/38 (2006.01) B01J 31/28 (2006.01)

Patent

CA 2386505

A liquid-phase chemical reaction medium comprises one or more reactants, optionally in the presence of a reaction product(s) and one or more solvents, diluents or other form of liquid carrier, a catalyst system comprising at least a metal or metal compound and optionally further compounds such as ligands or complexing agents; characterised in that the reaction medium further comprises a polymeric dispersant dissolved in said liquid carrier, said polymeric dispersant being capable of stabilising a colloidal suspension of particles of said metal or metal compound within the liquid carrier. The presence of the polymeric dispersant enables metal formed by catalyst deactivation to be more easily recovered and recycled. Preferably, the polymeric dispersant has sufficiently acidic or basic functionality to stabilise the colloidal suspension of said metal or metal compound.

Selon cette invention, un milieu de réaction chimique à phase liquide comprend un ou plusieurs réactifs, éventuellement en présence d'un ou de produits réactionnels, et d'un ou plusieurs solvants, diluants ou autre forme de support liquide, et un système catalyseur comprenant au moins un métal ou un composé métallique et éventuellement d'autres composés tels que des ligands ou des agents complexants. Cette invention se caractérise en ce que le milieu de réaction comprend également un dispersant polymère dissous dans le support liquide et capable de stabiliser une suspension colloïdale de particules du métal ou du composé métallique se trouvant dans le support liquide. La présence du dispersant polymère permet de récupérer et de recycler plus facilement le métal formé par la désactivation du catalyseur. De préférence, le dispersant polymère a une fonctionnalité acide ou basique suffisante pour stabiliser la suspension colloïdale du métal ou composé métallique.

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