Method of producing 5-hydroxymethyl furfural

A technology of hydroxymethyl furfural and purpose, which is applied in the field of producing 5-hydroxymethyl furfural by impacting flow coupling system, can solve the problems of dead angle and uneven mixing in the reactor, and achieve the effect of reducing energy consumption and being beneficial to the hydrolysis reaction.

Active Publication Date: 2019-03-08
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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Problems solved by technology

The side reaction products should be formic acid and levulinic acid instead of acetic acid. At the same t

Method used

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  • Method of producing 5-hydroxymethyl furfural
  • Method of producing 5-hydroxymethyl furfural
  • Method of producing 5-hydroxymethyl furfural

Examples

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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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Abstract

The invention belongs to the field of chemical engineering and in particular relates to a method of producing 5-hydroxymethyl furfural. The method comprises the following steps: 1) crushing raw materials and then adding diluted sulfuric acid for soaking and extruding the raw materials; 2) carrying out steam explosion treatment on the extruded materials; 3) extruding the exploded materials after water extraction; 4) filtering the water extraction solution, and refining and concentrating the water extraction solution to obtain an xylose solution; 5) adding an enzyme into bamboo residues for enzymolysis and then carrying out filtration; 6) carrying out electrodialysis, and acetic acid and lignin impurity separation by an ultrafiltration membrane and a nanofiltration membrane on the obtained glucose hydrolysate to obtain a glucose solution; and 7) mixing the glucose solution with hydrochloric acid and sec-octyl alcohol in an emulsification pump; and feeding the mixture into an impinging stream reactor and a coupling device of a static mixer to react and the like. The method provided by the invention improves the yield and the production efficiency of 5-hydroxymethylfurfural prepared from glucose, an extraction solvent is omitted, the production cost and the equipment investment are lowered, and no waste liquor is discharged in the production process, so that the method is a green and environment-friendly process method.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a production method of 5-hydroxymethylfurfural, in particular to a method for producing 5-hydroxymethylfurfural by using an impingement flow coupling system after extracting xylose by blasting bamboo scraps. Background technique [0002] 5-Hydroxymethylfurfural (also known as 5-hydroxymethyl-2-furfural, hydroxymethylfurfural, 5-hydroxymethylfurfural or 5-hydroxymethyl-2-furfural), English name 5-hydroxymethyl- 2-furfural, 5-hydroxymethylfurfural or 5-HMF, is an important chemical raw material. Its molecule contains an aldehyde group and a hydroxymethyl group, which can be used to synthesize many organic compounds and new polymer materials, including medicine, through hydrogenation, oxidative dehydrogenation, esterification, halogenation, polymerization, hydrolysis and other chemical reactions. , resinous plastics, diesel fuel additives, etc. The preparation method of hydroxymethyl...

Claims

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Application Information

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IPC IPC(8): C12P17/04C12P19/14C12P19/02C12P7/40C13K13/00
CPCC12P7/40C12P17/04C12P19/02C12P19/14C13K13/002
Inventor 郭志刚唐印雷林刘朝慧李旭初武长安李刚王明权
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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