Supported chromium-containing catalyst and process of polymerizing 1-olefins
US3953413A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1974 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Jun 13, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst and the method of making same and a method of making polymers of 1-olefins with said catalyst in which the catalyst is prepared by dispersing on a finely divided, difficultly reducible, inorganic support of the nature of silica, alumina, thoria, zirconia, titania, magnesia and mixtures thereof, a chromium chelate derived from a beta-dicarbonyl compound that may be either acyclic or cyclic, the chelate being essentially of the formula ##EQU1## wherein R is individually selected from hydrogen, alkyl, alkenyl, aryl, cycloalkyl and cycloalkenyl radicals and combinations of these radicals with each R containing 0-20 carbon atoms and a corresponding valence-satisfying number of hydrogen atoms, R' is selected from alkylene, alkenylene, arylene, cycloalkylene and cycloalkenylene radicals and combinations of these bivalent radicals with R' containing 1-20 carbon atoms and a corresponding valence-satisfying number of hydrogen atoms, m is a whole number of 1 to 3, n is a whole number of 0 to 2 and m plus n is 2 or 3 and X is an inorganic or organic negative group (relative to chromium) such as halide, alkyl, alkoxy and the like, followed by activating the mixture of the supportt an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.