Method for isomer reduction during polymerization and system for accomplishing the same
US11192969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2016 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a method for reducing isomerization during the copolymerization of ethylene with an α-olefin comprising adding to a reactor a reaction mixture comprising hydrogen, ethylene, an α-olefin, a solvent and a catalyst; where the catalyst does not include a chain shuttling agent that comprises dialkyl zinc; heating the reactor to a first temperature to react the ethylene with the α-olefin to form a copolymer; discharging from the reactor a first product stream to a heat exchanger; where the product stream comprises the copolymer; adding to the product stream prior to the heat exchanger a first additive that is operative to reduce isomerization of the α-olefin; and discharging from the heat exchanger a second product stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.