Polymerization process
US9540467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2013 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Aug 14, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for introducing a fresh feed of fresh comonomer and/or fresh inert hydrocarbon to a polymerization reactor which is part of a polymerization process having high and low pressure recovery systems, the high pressure recovery system being at a pressure of 0.5 MPa (5 bar) or above and the low pressure recovery system being at a pressure of less than 0.5 MPa (5 bar). The process includes passing the fresh feed and a process stream containing a first component of hydrogen, nitrogen and/or methane and a second component of a monomer to a separator which is part of the low pressure recovery system and is at a pressure of 0.4 MPa or less to produce a first stream containing a majority of the first component and a second stream containing the second component and a majority of the fresh feed, and passing the second stream to the polymerization reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.