Process for separating furanic compounds, in particular 5- hydroxymethylfurfural, from dimethoxysulfoxide by liquid-liquid extractions

• Main Authors: DROZDZ SOPHIE, JACQUIN MARC
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2020
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

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 wateroriginating 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. 本发明涉及一种从另外含有二甲亚砜（DMSO）的原料中分离呋喃类化合物的方法。这些呋喃类化合物特别是5-羟甲基糠醛（5-HMF）、2,5-二甲酰基呋喃（DFF）、2,5-呋喃二甲酸（FDCA）或2,5-呋喃二甲酸二甲酯（DMFDCA）。所述方法相继包括a)使原料与源自步骤c)的水接触，然后b)用有机溶剂液-液萃取，接着c)通过加入