Carbonylation catalyst system
AssigneeShell Oil Company
InventorsEit Drent, Petrus H. M. Budzelaar
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Abstract
A catalyst system which comprises: a) a group VIII metal compound, and b) a monophosphine of formula ##STR1## where R.sup.1 represents an aliphatic hydrocarbyl group, R.sup.2 represents an optionally substituted aromatic heterocyclic group having 5 or 6 ring atoms of which at least one is nitrogen, which may form part of an optionally substituted larger condensed ring structure, and R.sup.3 independently has the meaning of R.sup.2 or represents an optionally substituted aryl group or an acid addition salt thereof, and their use in the carbonylation of unsaturated compounds.
Claims7
A catalyst system for the carbonylation of olefinically and acetylenically unsatured compunds, which system comprises:
- a) a compound of divalent palladium
- b) a protonic acid having a pK.sub.a (measured at 18.degree. C. in aqueous solution) of below 6, and
- c) a monophosphine of formula ##STR6## wherein R.sup.1 represents an aliphatic hydrocarbyl group, R.sup.2 represents a pyridyl group, and R.sup.3 independently has the meaning of R.sup.1 or R.sup.2 or represents an aryl group, in such an amount that the number ofmoles of monophosphine per mole of protonic acid is intherange of from 0.1 to 50.
Dependencies are inferred from the claim text.