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Transition metal natural polymer hybridization catalyst as well as preparation method and application thereof

A technology of natural polymers and transition metals, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of environmental pollution, waste of resources, etc., and achieve simple preparation methods, low cost, and stability Good results

Active Publication Date: 2018-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The annual industrial lignin from pulp and paper waste liquid and bioethanol is as high as 4×10 7 ~5×10 7 t, however, less than 10% of the lignin has been effectively utilized, and more than 90% of the lignin will be burned directly, which pollutes the environment and wastes resources

Method used

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  • Transition metal natural polymer hybridization catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This example provides a preparation method of a zirconium-based and hafnium-based natural polymer hybrid catalyst (Zr-LS) and its application in the transfer hydrogenation reaction of furfuryl alcohol, and simultaneously provides an iron-based natural polymer hybrid catalyst (Fe-LS) And the application comparison example of cobalt-based natural polymer hybrid catalyst (Co-LS).

[0036] (1) Preparation of Zr-LS:

[0037] 5g sodium lignosulfonate was dissolved in 50g water, 5g ZrCl 4 Dissolve in 15g of water. After stirring and mixing at room temperature, place in a 100ml hydrothermal kettle for hydrothermal reaction in an oven at 120°C for 8h. After centrifugation, wash with water until the filtrate is neutral and colorless and transparent. Place it in an oven at 50°C and dry it for 12 hours to obtain the Zr-LS catalyst.

[0038] (2) Preparation of Hf-LS:

[0039] The ZrCl in (1) 4 Replaced by HfCl 4 , repeating the preparation process of (1) to obtain the Hf-LS c...

Embodiment 2

[0050] This example provides a preparation method of a zirconium-based natural polymer hybrid catalyst (Zr-AL) and its application in the transfer hydrogenation reaction of furfuryl alcohol

[0051] (1) Preparation of Zr-AL:

[0052] 5g alkaline lignin was dissolved in 50g water, 5g ZrCl 4Dissolve in 15g of water. After stirring and mixing at room temperature, place in a 100ml hydrothermal kettle for hydrothermal reaction in an oven at 120°C for 8h. After centrifugation, wash with water until the filtrate is neutral and colorless and transparent. Place in an oven at 50°C and dry for 12 hours to obtain a Zr-AL catalyst.

[0053] (2) Application of catalyst in transfer hydrogenation reaction of furfuryl alcohol:

[0054] Add 1 mmol of furfural, 10 mL of isopropanol and 200 mg of Zr-AL catalyst into a 25 ml thick-walled pressure-resistant bottle. Seal the pressure-resistant bottle, place it in an oil bath at 80°C for 1 hour, filter to obtain the liquid mixture, and take a sa...

Embodiment 3

[0056] This example provides the application of a zirconium-based natural polymer hybrid catalyst (Zr-LS) in the transfer hydrogenation reaction of furfuryl alcohol.

[0057] Add 1 mmol of furfural, 10 mL of isopropanol and 200 mg of the Zr-LS catalyst prepared in Example 1 into a 25 ml thick-walled pressure-resistant bottle. Seal the pressure-resistant bottle, place it in an oil bath at 100°C for 1 hour, filter to obtain the liquid mixture, and take a sample for gas phase analysis. The detection method is the same as in Example 1. The conversion rate of furfural obtained is 99%, and the selectivity of furfuryl alcohol is 95%. .

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Abstract

The invention belongs to the technical field of preparation of hybridization catalysts and in particular relates to a transition metal natural polymer hybridization catalyst as well as a preparation method and application thereof. According to the method provided by the invention, lignin and a group VB transition metal salt solution are subjected to hydrothermal reaction; the preparation method issimple and the transition metal natural polymer hybridization catalyst prepared by the method has good stability and can be used for efficiently catalyzing transfer hydrogenation reaction of aldehyde, ketone or levulinate and alcohol organic matters; the conversion rate of preparing alcohols from aldehydes reaches 84 percent to 99 percent and the selectivity of the alcohols reaches 80 to 100 percent. Furthermore, in an application process of the catalyst, the applicability of a substrate is good and the catalyst is easy to separate after reaction. The lignin is used as a raw material so thatthe catalyst is safe and low in cost and can be used for converting the lignin with low value into high value; the catalyst is green and environmentally friendly and can be circularly regenerated, andindustrialization is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of preparation of hybrid catalysts, and in particular relates to a transition metal natural polymer hybrid catalyst and its preparation method and application. Background technique [0002] Furfural is an important class of renewable biomass platform molecules, which can be used to produce various high-value-added furan derivatives through catalytic conversion, as well as additives for the production of liquid alkanes and fuels. Among them, furfuryl alcohol is one of the most attractive products. As an important chemical raw material, furfuryl alcohol is mainly used in the production of thermostatic resins, corrosion-resistant hybrid concrete, etc. It is also widely used as a solvent and an important intermediate, such as adhesives and wetting agents. The hydrogenation reduction of furfural to prepare furfuryl alcohol is difficult to occur under mild conditions, and the catalyst plays a key role in the tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C07D307/44C07D307/42C07C29/14C07C33/32C07C33/22C07C31/125C07D307/33C07C29/143C07C35/08
CPCB01J31/069C07C29/14C07C29/143C07C2601/14C07D307/33C07D307/42C07D307/44C07C33/32C07C33/22C07C31/1355C07C35/08
Inventor 祁海松周生辉陈贵娴冯晓王明
Owner SOUTH CHINA UNIV OF TECH
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