System and process for removal of organic carboxylates from mono ethylene glycol (MEG) water streams by acidification and vaporation under vacuum
US10308578B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2018 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Jun 25, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2290/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system and method for removing organic carboxylates from a mono ethylene glycol (“MEG”) stream includes a reaction vessel; means for cooling and diluting the MEG stream being routed to the reaction vessel; means for acidifying the cooled and diluted MEG stream during its residence time within the reaction vessel; and means for removing an acetic-rich overhead stream from the reaction vessel. The acidification of the cooled and diluted MEG stream occurs under a vacuum. The reaction vessel may be located downstream of a calcium removal vessel and receive a filtered bottom stream from that vessel, or it may be a single reaction vessel that cycles between a calcium removal mode and an acetate removal mode, with the pressure of the single vessel being greater during the calcium removal mode than during the acetate removal mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.