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Application of catalyst based on organic metal framework UiO-66 in cellulose hydrolysis

An organometallic, uio-66 technology, applied in organic compound/hydride/coordination complex catalysts, organic chemistry, physical/chemical process catalysts, etc., can solve the corrosion of reactant equipment, low conversion rate of cellulose hydrolysis, The problem of complex reaction operation, etc., achieves the effects of high reuse rate, improved hydrolysis conversion rate, and less dosage.

Active Publication Date: 2020-07-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to overcome the cellulose hydrolysis conversion rate in the prior art, the conversion rate of cellulose hydrolysis is low, the reaction operation is complicated, and the reactant will cause corrosion to the equipment etc., to provide a catalyst based on organometallic framework UiO-66 in the hydrolysis of cellulose, and to prepare an organic-inorganic hybrid recyclable catalyst based on organometallic framework UiO-66, which has both Bronsted and Lewis acid sites , when used in the hydrolysis reaction of cellulose, it shows excellent catalytic performance, improves the hydrolysis conversion rate of cellulose, and is non-corrosive and has no pollution to the environment

Method used

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  • Application of catalyst based on organic metal framework UiO-66 in cellulose hydrolysis
  • Application of catalyst based on organic metal framework UiO-66 in cellulose hydrolysis
  • Application of catalyst based on organic metal framework UiO-66 in cellulose hydrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of UiO-66 catalyst: 2.93g ZrCl4 and 2.075g of 1,4-phthalic acid were dissolved in 60mL of dimethylformamide (DMF) solvent, then 1.0739mL of 37wt% hydrochloric acid was added, and the mixture was ultrasonically dissolved for 30min; then the mixture solution was placed in 100mL of polytetrafluoroethylene In an ethylene reactor, keep the constant temperature at 120°C for 24 hours. After the reaction, cool to room temperature and filter to remove the solvent, wash the precipitate with DMF and methanol, and then dry the washed sample in an oven at 80°C overnight to obtain UiO-66 catalyst.

[0034] Application of UiO-66 catalyst in cellulose hydrolysis: Weigh 0.5g cellulose, 0.1g UiO-66 catalyst and 5mL deionized water and mix them in a 25mL stainless steel hydrothermal reaction kettle lined with polytetrafluoroethylene, seal Then heat the temperature to 180°C and react for 3 hours to obtain a hydrolyzed solution.

Embodiment 2

[0036] Preparation of UiO-66-COOH catalyst: 2.93g ZrCl 4 and 2.627g of 1,2,4-benzenetricarboxylic acid were dissolved in 60mL of dimethylformamide (DMF) solvent, then 1.0739mL of 37wt% hydrochloric acid was added, and the mixture was ultrasonically dissolved for 30min; then the mixture solution was placed in 100mL of poly In the tetrafluoroethylene reactor, keep the constant temperature at 140°C for 12h. After the reaction, cool to room temperature, filter and remove the solvent, wash the precipitate with DMF and methanol, and then dry the washed sample in an oven at 85°C overnight to obtain UiO -66-COOH catalyst.

[0037] Application of UiO-66-COOH catalyst in cellulose hydrolysis: weigh 0.5g cellulose, 0.1g UiO-66-COOH catalyst and 5mL deionized water and mix in a 25mL stainless steel hydrothermal reaction lined with polytetrafluoroethylene In the kettle, heat the temperature to 180°C after sealing, and react for 3 hours to obtain a hydrolyzed solution.

Embodiment 3

[0039] Preparation of UiO-66-2COOH catalyst: 2.93g ZrCl 4 and 3.177g of pyromellitic acid were dissolved in 60mL of dimethylformamide (DMF) solvent, then 1.0739mL of 37wt% hydrochloric acid was added, and the mixture was ultrasonically dissolved for 60min; then the mixture solution was placed in a 100mL polytetrafluoroethylene reactor In the process, the temperature was maintained at 100°C for 48h. After the reaction, cooled to room temperature and filtered to remove the solvent, the precipitate was washed with DMF and methanol, and then the washed sample was dried in an oven at 75°C overnight to obtain the UiO-66-2COOH catalyst. .

[0040] Application of UiO-66-2COOH catalyst in cellulose hydrolysis: Weigh 0.5g cellulose, 0.1g UiO-66-2COOH catalyst and 5mL deionized water and mix in a 25mL stainless steel hydrothermal reaction lined with polytetrafluoroethylene In the kettle, heat the temperature to 180°C after sealing, and react for 3 hours to obtain a hydrolyzed solution. ...

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Abstract

The invention relates to the technical field of preparation of cellulose hydrolysis catalysts., and discloses an application of a catalyst based on an organic metal framework UiO-66 in cellulose hydrolysis. The catalyst is one of UiO-66, UiO-66-X, HPW / UiO-66 and HPW / UiO-66-X, wherein -X is one of-NH2, -COOH and -2COOH; the UiO-66 and the UiO-66-X are prepared from ZrCl4 and an organic ligand through a reaction; and the HPW / UiO-66 and the HPW / UiO-66-X are UiO-66 and UiO-66-X loaded with phosphotungstic acid. When the catalyst is applied to cellulose hydrolysis, the mass ratio of the catalyst tocellulose is 1:(5-10). The organic-inorganic hybrid recyclable catalyst based on the organic metal framework UiO-66 prepared in the invention has excellent catalytic performance when being used in cellulose hydrolysis reaction.

Description

technical field [0001] The invention relates to the technical field of preparation of cellulose hydrolysis catalysts, in particular to the application of a catalyst based on organometallic framework UiO-66 in cellulose hydrolysis. Background technique [0002] Cellulose is the most widely distributed and most abundant polysaccharide in nature, insoluble in water and general organic solvents, and is the main component of plant cell walls. The research on cellulose degradation and conversion methods has become a hot topic in today's scientific and technological circles, and it is of great significance to solve the current resources, energy and environmental problems. Many potentially important chemical substances can be produced from cellulose, which is decomposed into glucose by hydrolysis, and further dehydration of glucose produces 5-hydroxymethylfurfural (HMF), which is mainly used in the synthesis of various industrially important chemicals. It is a platform chemical use...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J27/188C07H1/00C07H3/02
CPCB01J31/1691B01J27/188C07H1/00C07H3/02B01J2531/48B01J2531/0238Y02P20/584
Inventor 童东绅董玉萧任来宾俞卫华周春晖
Owner ZHEJIANG UNIV OF TECH
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