Method for preparing ethylene
US11485692B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 4, 2019 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Jul 4, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing ethylene including: feeding a thermally cracked compressed stream to a first distillation apparatus selectively operating as a first deethanizer or a depropanizer; and feeding an overhead discharge stream of the first distillation apparatus to a second distillation apparatus. When the first distillation apparatus is operated as the first deethanizer, a bottom discharge stream of the second distillation apparatus is fed to a C2 separator. When the first distillation apparatus is operated as the depropanizer, the bottom discharge stream of the second distillation apparatus is passed through a third distillation apparatus and fed to the C2 separator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.