Removal of propylene glycol and/or propylene glycol ethers from aqueous streams
US7002026B2 · kind B2 · utility
0Cited by
6References
5Claims
0Family size
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Key dates
| Filing date | Jun 21, 2004 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Jun 21, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/36
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An aqueous stream containing propylene glycol and/or ethers thereof is treated by counter current liquid—liquid extraction with propylene and/or propane to separate the propylene glycol and/or ether from the aqueous stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.