Tungsten based catalyst system

B - Operations – Transporting – 01 – J

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B01J 31/18 (2006.01) B01J 31/22 (2006.01) B01J 31/34 (2006.01) C07C 2/30 (2006.01)

Patent

CA 2559548

A catalyst system including the combination of a source of tungsten; a ligand precursor containing at least N or O as a bonding atom to bond to the tungsten in the source of tungsten, the source of tungsten and the ligand precursor being selected to form an acid due to the bonding of the ligand precursor to the tungsten; and the catalyst system being characterized therein that it is substantially free of the acid formed due to the bonding of the ligand precursor to the tungsten; and that the molar ratio of the tungsten in the source of tungsten to ligand precursor is at least 1: 3/n where n is the number of bonds that the ligand precursor forms with the tungsten.

L'invention porte sur un système de catalyse comportant: une source de tungstène; un précurseur de ligand contenant au moins N ou O comme atome de liaison avec le tungstène de la source de tungstène, ladite source et ledit précurseur étant sélectionnés de manière à former un acide résultant de la fixation du précurseur au tungstène. Le système de catalyse se caractérise: en ce qu'il est sensiblement exempt dudit acide résultant de la liaison du précurseur au tungstène; et par un rapport molaire tungstène provenant de la source de tungstène/précurseur d'au moins 1: 3/n où n est le nombre de liaisons que le précurseur forme avec le tungstène.

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