Process for polymerizing ethylene
US4168356A · kind A · utility
11Cited by
9References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1978 |
| Grant date | Sep 18, 1979 |
| Priority date | — |
| Expiry date | Mar 29, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and apparatus for the polymerization of ethylene in at least one multizone reactor at a pressure of 300 to 2500 bars and at a temperature of 150 to 350.degree. C. The reaction mixture is passed from the reactor to a separator at a pressure of 50 to 500 bars in which the polymer separates from the gas. The polymer is then passed to a hopper at a pressure of 1 to 20 bars in which the major part of the gas remaining dissolved in the polymer is removed. The gas from the separator is recompressed and is returned only to the first zone of the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.