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

Active Publication Date: 2021-07-30
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Application Information

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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 time, it is still laminar after the impact reaction. There are dead ends in the reactor and uneven mixing.

Method used

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  • A kind of method of producing 5-hydroxymethylfurfural
  • A kind of method of producing 5-hydroxymethylfurfural
  • A kind of method of producing 5-hydroxymethylfurfural

Examples

Experimental program
Comparison scheme
Effect test

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 industry, in particular to a method for producing 5-hydroxymethyl furfural. The method comprises the following steps: 1) pulverizing the raw materials, soaking in dilute sulfuric acid, and then squeezing dry; 2) steam blasting the squeezed-dried material; 3) water-extracting the blasted material and squeezing it dry; 4. ) The water extract is filtered, purified and concentrated to obtain xylose liquid; 5) Enzyme is added to the bamboo slag for enzymolysis, and then filtered; 6) The obtained glucose enzymolysis solution is separated from acetic acid, lignin impurities to obtain glucose solution; 7) the glucose solution is mixed with hydrochloric acid and sec-octanol in the emulsification pump; it enters the impact flow reactor and the static mixer coupling device for reaction, etc. The invention greatly improves the yield and production efficiency of preparing 5-hydroxymethylfurfural from glucose, saves the extraction solvent, reduces the production cost and equipment investment, does not discharge waste liquid in the production process, and is a green environmental protection 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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Patent Type & Authority Patents(China)
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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