A kind of method of producing 5-hydroxymethylfurfural
A hydroxymethylfurfural and purpose technology, which is applied in the field of impinging flow coupling system to produce 5-hydroxymethylfurfural, can solve the problems of dead angle and uneven mixing in the reactor, achieve uniform reaction, reduce side reactions, and increase conversion rate Effect
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Embodiment 1
[0068] Bamboo leftovers (including bamboo shreds, bamboo sawdust, and bamboo processing waste) are crushed to small particles of 25 mesh; 0.5% dilute sulfuric acid is added to 10 times the amount of dry matter, soaked for 10 hours, and squeezed dry; the squeezed bamboo particles are used Steam explosion method is carried out blasting treatment to the bamboo as raw material, obtains the bamboo material after steam explosion treatment; Bamboo particle blasting adopts instant blaster, blasting temperature 190 ℃ holding time 80s, blasting time 0.00087s; Most of the hemicellulose is degraded to Xylose: the bamboo material after the steam explosion treatment is carried out continuous water extraction, wherein the xylose is extracted with water, the water extract is filtered, the ultrafiltration membrane is used to remove impurities, and the nanofiltration membrane is concentrated to a xylose content of 15% (mass percentage) ; Squeeze dry at the same time to obtain bamboo residue with...
Embodiment 2
[0071] 5-hydroxymethylfurfural is prepared according to a conventional solvent extraction method, and then the yields of hydrochloric acid and formic acid are compared with those of the present invention.
Embodiment 3
[0073] The preparation of 5-hydroxymethylfurfural was carried out according to the method and steps of Example 1, except that the hydrolysis temperature was changed to 200°C.
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