Title:
METHOD FOR PREPARING LEVULINIC ACID AND FURFURAL BY MEANS OF DIRECT LIQUEFACTION OF FIBROUS BIOMASS
Document Type and Number:
WIPO Patent Application WO/2020/113995
Kind Code:
A1
Abstract:
Provided is a method for preparing levulinic acid and furfural by means of the direct liquefaction of a fibrous biomass. The method comprises using the fibrous biomass as a raw material, mixing same with a sulfate catalyst in a polar aprotic solvent/water composite solvent system for catalytic hydrolysis and directionally preparing the levulinic acid by direct liquefaction; filtering the liquefied system and recovering the unreacted lignin, and performing fractional distillation, under reduced pressure, on a filtrate to gradually separate water, hydroxymethylfurfural, the furfural, the polar aprotic solvent and the levulinic acid, wherein the recovered polar aprotic solvent and the sulfate catalyst are recycled with the water obtained by means of the fractional separation. The method uses a wide-source, low-cost and renewable fibrous biomass as a raw material, and is green and environmentally friendly and simple in terms of the processes. In the polar aprotic solvent/water composite solvent system, the target products, i.e. levulinic acid and furfural, have a good selectivity and a high yield, and are easy to separate; and the used solvent, catalyst, etc. can all be efficiently recycled. The method is environmentally-friendly and applicable to industrial large-scale production.
Inventors:
WANG KUI (CN)
JIANG JIANCHUN (CN)
LIU CHAO (CN)
WEI MIN (CN)
XU JUNMING (CN)
LI JING (CN)
XIA HAIHONG (CN)
LIU PENG (CN)
YE JUN (CN)
ZHOU MINGHAO (CN)
ZHAO JIAPING (CN)
WANG RUIZHEN (CN)
JIANG JIANCHUN (CN)
LIU CHAO (CN)
WEI MIN (CN)
XU JUNMING (CN)
LI JING (CN)
XIA HAIHONG (CN)
LIU PENG (CN)
YE JUN (CN)
ZHOU MINGHAO (CN)
ZHAO JIAPING (CN)
WANG RUIZHEN (CN)
Application Number:
PCT/CN2019/100946
Publication Date:
June 11, 2020
Filing Date:
August 16, 2019
Export Citation:
Assignee:
INST CHEMICAL IND FOREST PRODUCTS CAF (CN)
International Classes:
C07D307/50; C07C51/00; C07C51/44; C07C59/185
Foreign References:
| CN107382714A | 2017-11-24 | |||
| CN107021878A | 2017-08-08 | |||
| CN105859545A | 2016-08-17 | |||
| CN102617524A | 2012-08-01 |
Attorney, Agent or Firm:
NANJING RUIHONG PATENT & TRADEMARK AGENCY (ORDINARY PARTNERSHIP) (CN)
Download PDF:
Previous Patent: AIR COMPRESSOR
Next Patent: CONFIGURED GRANT DETERMINATION METHOD, TERMINAL AND NETWORK SIDE DEVICE
Next Patent: CONFIGURED GRANT DETERMINATION METHOD, TERMINAL AND NETWORK SIDE DEVICE