Method of producing 3-hydroxyadipic acid-3,6-lactone
US11760739B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Mar 24, 2020 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Oct 20, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/33
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method relates to producing 3-hydroxyadipic acid-3,6-lactone, the method including the following steps (A) and (B): (A) a step of adding an acid to a 3-hydroxyadipic acid-containing aqueous solution to obtain a 3-hydroxyadipic acid-3,6-lactone-containing aqueous solution; and (B) a step of obtaining a 3-hydroxyadipic acid-3,6-lactone extract by bringing the 3-hydroxyadipic acid-3,6-lactone-containing aqueous solution obtained in step (A) into contact with an extraction solvent that is phase-separated from the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.