Flexible process for treating solvent, such as monoethylene glycol, used in natural gas extraction
US9943775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2014 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2252/2023
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention concerns a flexible process for purifying a solvent which inhibits the formation of hydrates during gas processing, in particular monoethylene glycol (MEG), said solvent having a boiling point which is higher than that of water and, at least at one point in time, being mixed with water and salts, the process operating in a different manner with the same facility as a function of the quantity of salts in the MEG to be treated.The process operates in accordance with a phase known as reclaiming (separation of salts under vacuum followed by vacuum distillation) when the salts content exceeds the precipitation threshold and if not, the process operates in a regeneration phase (absence of separation of salts and no operation under vacuum).Advantageously, the change is made under the control of means for testing the salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.