Olefin polymerization process
US3960826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1974 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Aug 12, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/113
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An olefin polymerization process for the preparation of polyolefins having relatively low molecular weights and high melt indexes without loss of catalyst activity, utilizing a catalyst comprising a silica xerogel support having a pore volume greater than about 2.0 cc/g, the major portion of which volume is provided by pores having pore diameters ranging from 300 to 600 A and a surface area ranging from 200 to 500 m.sup.2 /g, and having deposited thereon a metal-containing catalytic material, such as chromium oxide, or other metal oxide. The process is designed for the preparation of polymers and copolymers of 1-olefins having a maximum of 8 carbon atoms in the chain and having no branching nearer the double bond than the 4-position, e.g., ethylene polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.