Process for separating furanic compounds, in particular 5-hydroxymethylfurfural, from dimethoxysulfoxide by liquid-liquid extractions
US10829463B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2018 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Sep 10, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/46
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process for separating furanic compounds from a feedstock additionally containing dimethoxysulfoxide (DMSO). These furanic compounds are in particular 5-hydroxymethylfurfural (5-HMF), 2,5-diformylfuran (DFF), 2,5-furanedicarboxylic acid (FDCA) or dimethyl 2,5-furandicarboxylate (DMFDCA). The process successively comprises a) bringing the feedstock into contact with water originating from step c), then b) a liquid-liquid extraction with an organic solvent followed by a back extraction c) by the water added in order to obtain an organic extract rich in furanic compounds. The extract may then be subjected to a crystallization step d) and then a filtration in order to obtain the solid furanic compound. The water-rich or solvent-rich effluents are advantageously recycled respectively to the back extraction and the extraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.