Process for the purification of a glycol solution
US5817889A · kind A · utility
13Cited by
1References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1995 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Aug 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2290/543
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An amount of water is added to a glycol solution to be purified to enable segregation of the resulting mixture into a hydrocarbon phase and a glycol phase. The hydrocarbon phase is separated from the glycol phase and said glycol phase is desalted, e.g. by electrodialysis, to give a desalted and substantially hydrocarbon-free glycol solution which is then concentrated by steam stripping. The method is useful for purifying waste glycol solutions resulting from oil or gas production effluent processing using glycols, and in particular from a gas hydrate inhibition treatment or natural gas dehydration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.