Quaternary ammonium compounds and gas hydrate inhibitor compositions
US10550304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2014 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Jul 31, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2208/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Quaternary ammonium compounds and compositions comprising the compounds are disclosed. The compositions are valuable as gas hydrate inhibitors in the oil and gas exploration, recovery and processing industries. The compounds and compositions may have improved biodegradability and reduced toxicity when compared with benchmark materials. Quaternary ammonium compounds of the present disclosure have the formula (I) in which R is C1-4 alkyl, C6-10 aryl, or C1-4alkyl-C6-10aryl; R1 is hydrogen or a group of formula —C(═O)X; and R2 is hydrogen or a group of formula —C(═O)Y, provided that R1 and R2 are not both hydrogen; X and Y are each independently a hydrogen, C1-6 alkyl or C1-6 alkenyl group, and Z is a C4-24 alkyl or C4-24 alkenyl group; each D is independently C1-4 alkylene; and A− is an anion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.