Treatment of lower glycol-containing operative fluids
US5194159A · kind A · utility
18Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1991 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Dec 18, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D301/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Operative fluids containing lower glycol are contacted with semi-permeable membranes under reverse osmosis conditions to permeate lower glycol to provide a reclaimed lower glycol product. Exemplary operative fluids include antifreeze solutions, heat transfer fluids, deicers, quenchants, hydraulic fluids, lubricants, solvents and absorbents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.