Supported catalyst used in the production of cycloalkadienes...

B - Operations – Transporting – 01 – J

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252/94, 260/692.

B01J 23/36 (2006.01) B01J 21/02 (2006.01) B01J 31/12 (2006.01) C07C 6/04 (2006.01) C07C 6/06 (2006.01)

Patent

CA 2292584

The invention relates to a supported catalyst used in the production of cycloalkadienes in a metathesis reaction containing a) .gamma.-Al2O3 as supporting material; b) 2-20 wt.% Re2O7; c) 0.5-5 wt.% B2O3; d) 0-20 wt.% SnR4 or SnO2, or a mixture of SnR4 and SnO2, in which R stands for an alkyl or aryl radical. The invention also relates to a method for producing cycloalkadienes in the liquid phase by metathesis reaction of cycloalkenes, cyclopolyenes, linear polyenes and their mixtures in the presence of the supported catalyst.

L'invention concerne un catalyseur sur support utilisable dans la fabrication de cycloalcadiènes dans une réaction de métathèse, caractérisé en ce qu'il comprend a) de l'Al¿2?O¿3? .gamma. comme matériau support, b) de 2 à 20 % en poids de Re¿2?O¿7?, c) de 0,5 à 5 % en poids de B¿2?O¿3?, d) de 0 à 20 % en poids de SnR¿4? ou de SnO¿2? ou d'un mélange de SnR¿4? et SnO¿2?, où R désigne un reste alkyle ou aryle. L'invention concerne également un procédé de fabrication de cycloalcadiènes en phase liquide par réaction de métathèse de cycloalcènes, cyclopolyènes, de polyènes linéaires ou de leurs mélanges en présence du catalyseur sur support.

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