Olefin polymerization processes
US10934372B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2017 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Dec 11, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2500/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for reducing the level of hydrogen in certain polymerization effluent and recycle streams containing unreacted propylene monomers and hydrogen by contacting the streams with a hydrogenation catalyst so as to convert at least part of the propylene to the corresponding alkane. The process is particularly applicable to the effluent from a slurry polymerization reactor which has been used to produce a polypropylene homopolymer or copolymer having a first molecular weight and at least part of the effluent is to be supplied to a slurry polymerization reactor to produce a polypropylene homopolymer or copolymer having a second, higher molecular weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.