Catalyst and process of preparing the catalyst
US4184979A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Jul 17, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A catalyst for polymerizing one or more 1-olefins and prepared by the process of (1) forming an initial mixture of a finely divided support such as silica and a chromium.sup.+3 compound of either of the formulas ##STR1## or Cr(OOCR).sub.3 or a mixture in an amount to provide about 0.1-30 weight percent of chromium in the finished catalyst and in which each R is individually selected from hydrogen or a hydrocarbyl group of 1-20 carbon atoms and the necessary hydrogen atoms, followed by (2) heating the mixture of (1) in a stream of dry, inert, and non-oxidizing gas and heating to a temperature of about 230.degree.-540.degree. C., and then (3) forming a second combination by adding a titanium compound to the product of (2) at a temperature ranging from 95.degree.-370.degree. C., and then (4) activating the mixture of (3) by heating in a dry, oxidizing atmosphere such as dry air to a temperature of about 370.degree.-1100.degree. C. The disclosure also includes a method of preparing such a catalyst and the method of polymerizing at least one 1-olefin with said catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.