Quaternary arylcarboxylate compositions for extracting C1 to C4 carboxylic acids from aqueous streams
US9611209B1 · kind B1 · utility
3Cited by
35References
30Claims
0Family size
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Key dates
| Filing date | Dec 18, 2015 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Dec 18, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to solvents for extracting C1 to C4 carboxylic acids from aqueous streams. More specifically, the extraction solvents include one or more salts composed of a phosphonium cation and an arylcarboxylate anion. The extraction solvents may further include one or more non-ionic liquid organic solvents as an enhancer. The extraction solvents are useful for extracting aqueous mixtures containing one or more lower carboxylic acids, such as monocarboxylic acids, alkoxycarboxylic acids, and halogen-containing carboxylic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.