Recovery of organic acids
US7601865B2 · kind B2 · utility
88Cited by
80References
35Claims
0Family size
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Key dates
| Filing date | Jan 28, 2005 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Jan 3, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for the recovery of an organic acid from a dilute salt solution in which the cation of the salt forms an insoluble carbonate salt. A tertiary amine and CO2 are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and an amine. A water immiscible solvent, such as an alcohol, is added to extract the acid/amine complex from the dilute salt solution to a reaction phase. The reaction phase is continuously dried and a product between the acid and the solvent, such as an ester, is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.