Method and system for extracting long chain dicarboxylic acid
US11999689B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 15, 2021 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | May 25, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present disclosure provides a method for extracting long chain dicarboxylic acid, the method comprising: (1) subjecting a long chain dicarboxylic acid fermentation broth to a primary membrane filtration treatment to give a first filtrate; subjecting the first filtrate to decolorization, crystallization, and solid-liquid separation to give a first solid; (2) redissolving the first solid in water to form a solution; subjecting the solution to decolorization, crystallization by acidification, and solid-liquid separation to give a second solid. By the method, the resulted long chain dicarboxylic acid product has a high purity and no residual organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.