Removal of catalyst residues from carbon monoxide/olefin polymers with oxidant/phosphine treatment
US4880909A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Sep 6, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is a process for reducing catalyst residues from a Group VIII metal compound-containing polymer of CO, ethylene and optionally at least one olefinically unsaturated hydrocarbon. The process comprises contacting the polymer with an effective amount of a bidentate phsophine ligand having the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent hydrocarbon groups which may contain polar or non-polar substituents and R represents a bivalent organic bridging group containing at least two carbon atoms in the bridge, recovering a Group VIII metal compound-containing organic liquid, contacting said Group VIII metal compound-containing liquid with an effective oxidant for the Group VII metal and recycling the resulting oxidized Group VIII metal compound to a process for preparing polymers of carbon monoxide and ethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.