Ethylene glycol removal of residual glycol impurities
US8546620B2 · kind B2 · utility
0Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2008 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | May 11, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process includes receiving a process stream including at least about 80.0% by weight propylene glycol, and contacting the process stream with an absorbent material to produce a product stream. The absorbent material is configured to preferentially absorb ethylene glycol relative to propylene glycol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.