System for recycling product streams separated from a hydrocarbon-containing feed stream
US9238182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Sep 11, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J11/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a process for recycling product streams that have been separated from a hydrocarbon-containing feed stream comprising olefin monomer, olefin co-monomer, hydrocarbon diluent and components such as H2, N2, O2, CO, CO2, and formaldehyde. In accordance with the present process a hydrocarbon-containing feed stream is separated into a) a first side stream comprising hydrocarbon diluent and olefin monomer; b) a second side stream which is substantially hydrogen-free and comprises hydrocarbon diluent and olefin monomer, c) a bottom stream comprising substantially olefin-free hydrocarbon diluent, and d) an overhead vapor stream comprising olefin monomer, hydrocarbon diluent and components such as formaldehyde, H2, N2, O2, CO and CO2. The present process further includes recycling said first and said second side streams in a polymerization process for preparing bimodal polyolefin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.