Epoxidation process
US10865189B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2019 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Jul 15, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/402
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the oxidation of ethylene to form ethylene oxide which comprises: providing an aqueous stream containing ethylene glycol and impurities; introducing the aqueous stream in a first ion exchange treatment bed to reduce the content of these impurities; determining whether an outlet of the first ion exchange treatment bed has a conductivity greater than about 5 μS/cm; upon determining that the outlet of the first ion exchange treatment bed has a conductivity greater than about 5 μS/cm, introducing the outlet of the first ion exchange treatment bed into a second ion exchange treatment bed; and upon determining that the outlet of the first ion exchange treatment bed has a conductivity greater than about 60 μS/cm, redirecting the introduction of the aqueous stream to the second ion exchange treatment bed and regenerating the first ion exchange bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.