Shell Oil Comapny

Jayne Jubb

Frank Baardman

Rudolf Jacobus Wijngaarden

Arleen Marie Bradford

Pieter Scheerman

Johannes A Van Broekhoven

Erwin Paulus Bleeker

A process for the preparation of copolymers of carbon monoxide with an olefinically unsaturated compound comprising copolymerizing the monomers in the presence of a catalyst composition based upon

Process for the preparation of copolymers

A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound comprising contacting the monomers in the presence of a liquid diluent with a catalyst composition which is based on

Process for the copolymerization of carbon monoxide with an olefinically

A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound in which a solid particulate material is suspended in a liquid diluent in which the polymer to be produced forms a suspension. The monomers are contracted in the liquid diluent containing the suspended solid particulate material with a catalyst composition which is based on a source of a Group VIII metal and a boron hydrocarbyl compound.

A process for the copolymerization of carbon monoxide with an olefinically unsaturated compound in which the monomers are contacted in the presence of a liquid diluent and a protic compound with a catalyst composition which is based on a source of a Group VIII metal and a hydrocarbylborane. A stirring power is transmitted to the polymerization mixture of at least 0.25 kW/m.sup.3.

A process for the copolymerization of carbon monoxide with an olefinically unsaturated in which the monomers are contacted with a catalyst composition which is based on a source of a Group VIII metal and a boron hydrocarbyl compound. Additional boron hydrocarbyl compound is added to the polymerization mixture during the copolymerization or when the catalyst has lost its activity. A process for recycling a polymerization catalyst is also presented. It includes the steps of recovering a Group VIII metal composition from a preceding copolymerization process for the preparation of a copolymer of carbon monoxide and an olefinicaIly unsaturated compound and adding a boron hydrocarbyl compound to the Group VIII metal composition.

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Amsterdam, Netherlands

Jayne Jubb