METHOD FOR SIMULTANEOUSLY RECOVERING FURFURAL PRODUCT AND SULFURIC ACID CATALYST FROM FURFURAL RESIDUE

• Main Authors: DONGCHAO CHENG, YE ZHANG, YIFEI YANG, ZHONGLIAN YANG, SHUO TAN, MINGQIANG CHEN, YISHUANG WANG, FUHU LI, JUN WANG, SHAOMIN LIU, YIMING YU
• Format: Patent
• Language: English
• Published: 22.10.2020
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

The present invention discloses a method for simultaneously recovering a furfural product and a sulfuric acid catalyst from furfural residue. The method for simultaneously recovering the furfural product and the sulfuric acid catalyst from furfural residue includes the following three steps: step 1, furfural residue is washed with circulating wastewater for dissolving residual furfural and sulfuric acid in the circulating wastewater; step 2, the mixture of the furfural residue and the circulating wastewater is subjected to solid-liquid separation; and step 3, the circulating wastewater in which the residual furfural and the sulfuric acid are dissolved is subjected to evaporation concentration in a wastewater evaporator, and the product furfural and the catalyst sulfuric acid are simultaneously recovered. The method for simultaneously recovering the furfural product and the sulfuric acid catalyst from the furfural residue avoids additional energy consumption and water consumption, prevents the furfural and sulfuric acid in the furfural residue from polluting air, realizes yield increase of the furfural and recycling of the sulfuric acid catalyst, and significantly improves the economic efficiency of furfural production.