Novel supported polyacid catalyst and application thereof in furfural preparation

An acid catalyst and supported technology, which is applied in molecular sieve catalysts, physical/chemical process catalysts, organic chemistry, etc., to achieve the effects of improving catalytic performance, improving reactivity, and wide repeatability

Pending Publication Date: 2021-03-30
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no research on the use of heteropolyacid-loaded molecular sieves as biomass conversion catalysts to prepare furfural, and heteropolyacid-loaded molecular sieves can improve the acid properties of molecular sieves, thereby increasing the yield of furfural

Method used

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  • Novel supported polyacid catalyst and application thereof in furfural preparation
  • Novel supported polyacid catalyst and application thereof in furfural preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh molecular sieve ZSM-5(38) and polyacid compound H respectively according to mass ratio 1:0.1 3 PW 12 o 40 ; the polyacid compound H 3 PW 12 o 40 Pour into the reactor, add 2.7ml of water according to the equal-volume impregnation method, stir to dissolve, then add the polyacid solution dropwise to the ZSM-5(38) powder, stir while adding, and stir for 30 minutes after dissolving. The reaction system was left to stand for 24 hours, and a pale yellow solid was precipitated, which was filtered and dried, and the solid was placed in a receptacle furnace and calcined at 250° C. for 4 hours to obtain a polyacid-supported catalyst for preparing furfural.

[0036] Xylose powder 0.15g, 0.75mmol10%H 3 PW 12 o 40 Put the catalyst of / ZSM-5 (38) into a thick-walled pressure-resistant bottle, add 6ml of 10% LiBr / water solution, and heat and stir. The reaction temperature is 130° C., and the reaction time is 4 hours. After the reaction is finished, after cooling, the re...

Embodiment 2

[0038] Weigh molecular sieve ZSM-5(38) and polyacid compound H respectively according to mass ratio 1:0.2 3 PW 12 o 40 ; the polyacid compound H 3 PW 12 o 40 Pour into the reactor, add 2.7ml of water according to the equal-volume impregnation method, stir to dissolve, then add the polyacid solution dropwise to the ZSM-5(38) powder, stir while adding, and stir for 30 minutes after dissolving. The reaction system was left to stand for 24 hours, and a light yellow solid was precipitated, which was filtered and dried. The solid was placed in a receptacle furnace and calcined at 300° C. for 4 hours to obtain a polyacid-supported catalyst for preparing furfural.

[0039] xylose powder 0.10g, 0.75mmol10%H 3 PW 12 o 40 Put the catalyst of / ZSM-5 (38) into a thick-walled pressure-resistant bottle, add 6ml of 20% LiBr / water solution, and heat and stir. The reaction temperature is 150°C, and the reaction time is 5h. After the reaction is finished, after cooling, the reaction mix...

Embodiment 3

[0041] Weigh molecular sieve ZSM-5(38) and polyacid compound H respectively according to mass ratio 1:0.3 3 PW 12 o 40 ; the polyacid compound H 3 PW 12 o 40 Pour into the reactor, add 2.7ml of water according to the equal-volume impregnation method, stir to dissolve, then add the polyacid solution dropwise to the ZSM-5(38) powder, stir while adding, and stir for 30 minutes after dissolving. The reaction system was allowed to stand for 24 hours, and a light yellow solid was precipitated, which was filtered and dried. The solid was placed in a mug furnace and calcined at 350° C. for 4 hours to obtain a polyacid-supported catalyst for preparing furfural.

[0042] Xylose powder 0.15g, 0.75mmol10%H 3 PW 12 o 40 Put the catalyst of / ZSM-5 (38) into a thick-walled pressure-resistant bottle, add 6ml of 30% LiBr / water solution, and heat and stir. The reaction temperature is 180°C, and the reaction time is 6h. After the reaction is finished, after cooling, the reaction mixture...

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Abstract

The invention relates to a novel supported polyacid catalyst and application thereof in furfural preparation. The catalyst is a polyacid compound with a Keggin structure, and the general formula of the polyacid compound with the Keggin structure is xH3PW12O40 / ZSM-5(38) (x=5%-50%). The preparation method of the catalyst comprises the following steps: respectively weighing a molecular sieve ZSM-5(38) and a compound H3PW12O40, pouring the compound H3PW12O40 into a reactor, adding water, conducting stirring, dropwisely adding the polyacid into the ZSM-5(38), and conducting stirring, standing, filtering, drying and sintering to obtain the catalyst. Biomass powder, the catalyst and a lithium bromide / water system are added into a thick-wall pressure-resistant bottle, reacting is conducted to generate furfural, the catalyst is centrifugally separated out after the reaction is finished, extracting is conducted with dichloromethane, and reduced pressure distillation is conducted. The catalyst has high catalytic performance, is easy to separate from a reaction system and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation and application, and specifically relates to a novel nanometer solid-loaded heteropolyacid catalyst. At the same time, the invention also relates to the application of the nanometer catalyst in preparing furfural. [0002] technical background [0003] Energy is related to the survival and development of human beings, and it is the lifeblood of the national economy. Facing the huge pressure of energy crisis and environmental damage, for the sustainable development of human society, the development of renewable and clean energy has become the focus of many countries in the world. Since then, the development of biomass industry has become an important development strategy of our country. Biomass exists widely on the earth. It is an organic substance formed by the photosynthesis of green plants, mainly including sugars (such as monosaccharides, starch, etc.), straw, lignocellulose, oil,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J27/188C07D307/48
CPCB01J27/188B01J29/40C07D307/48
Inventor 段喜鑫邵雪婷韩永蔚时君友
Owner BEIHUA UNIV
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