US 12,275,713 B1
Method for preparing 5-hydroxymethylfurfural
Hai Xu, Hefei (CN); Qiang Xu, Heifei (CN); Sanxi Yu, Hefei (CN); and Xinglong Li, Hefei (CN)
Assigned to HEFEI LEAF BIOTECH CO., LTD., Anhui (CN)
Filed by HEFEI LEAF BIOTECH CO., LTD., Hefei (CN)
Filed on Sep. 24, 2024, as Appl. No. 18/895,254.
Claims priority of application No. 202311420375.9 (CN), filed on Oct. 30, 2023.
Int. Cl. C07D 307/50 (2006.01); B01J 23/14 (2006.01); B01J 37/02 (2006.01)
CPC C07D 307/50 (2013.01) [B01J 23/14 (2013.01); B01J 37/0203 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for preparing 5-hydroxymethylfurfural, comprising the following steps:
step S1, drying and then grinding humin into a first powder, suspending the first powder in water to obtain a suspension, adding a tin tetrachloride aqueous solution under rapid stirring to the suspension, stirring continuously after the addition, standing overnight for aging, performing concentrating and drying, grinding the resultant into a second powder, and calcining the second powder in air to obtain a tin on humin catalyst;
step S2, injecting a sugar-containing raw material and an organic solvent using a metering pump into a reaction device filled with the tin on humin catalyst for reaction respectively, and after the reaction, performing separation and purification to obtain 5-hydroxymethylfurfural;
wherein the sugar-containing raw material is at least one of fructose syrup, glucose syrup, high fructose corn syrup, waste molasses and straw syrup.