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Method for synthesizing porous metal organic framework based on lignin degradation product

A porous metal and organic framework technology, applied in the field of metal organic framework, can solve the problems of low overall activity and limited high-quality field, and achieve the effect of simple process, mild experimental conditions and low energy consumption

Active Publication Date: 2020-08-07
苏州铭泽新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many active functional groups in lignin macromolecules, such as aromatic groups, methoxy groups and hydroxyl groups, etc., their overall activity is not high, and the field of high quality is limited.

Method used

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  • Method for synthesizing porous metal organic framework based on lignin degradation product
  • Method for synthesizing porous metal organic framework based on lignin degradation product
  • Method for synthesizing porous metal organic framework based on lignin degradation product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] 5 g of the lignin prepared in the above test example 1 was dispersed in 100 mL of water, and 0.5 g of solid base catalyst (aminopropyl functionalized mesoporous SBA-15 silica molecular sieve) was added to the lignin aqueous solution, mechanically Stir for 10 minutes to mix evenly. The speed of mechanical stirring is 800 rpm. Add 5 mL of commercially available hydrogen peroxide (30% by mass) to the mixed solution. At this time, the pH is 9.2. Under the microwave power of 200W, stir After 120 minutes, lignin was effectively converted into aromatic acid monomers, which were lignin degradation products and ligands for the subsequent preparation of porous metal organic frameworks.

[0079] Gel permeation chromatography was used to analyze the catalytic degradation products. The results showed that the molecular weight of lignin decreased significantly after the reaction, and the molecular weights of the degradation products were mainly distributed at 164, 194 and 224 Daltons,...

Embodiment 2～5

[0081] Using the same process as in Example 1, selecting different solid base catalyst quality, hydrogen peroxide volume, reaction pH, microwave power and reaction time, lignin degradation products with different effects can be obtained. The amounts of materials used and the reaction conditions are summarized in Table 1.

Embodiment 6

[0090] 2.5L of aromatic acid organic ligand solution (0.5mol L -1 , 1.26mol) and 210mL of ethanol were mixed uniformly to form a "ligand solution"; 2.5L of Cu(NO 3 ) 2 Aqueous solution (0.5mol·L -1 , 1.26mol), that is, "metal solution"; the "ligand solution" and "metal solution" reactants were continuously transferred to a 10L reactor equipped with a heating mantle at a feeding rate of 2mL / min, and the reaction The mixture was heated to 80°C and refluxed for 10 hours. After the reaction, it was transferred to a collector through an automatic control system, filtered and washed, and dried at 100°C for 12 hours to obtain a white powder, which was a porous metal organic framework.

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Abstract

The invention provides a method for synthesizing a porous metal organic framework based on a lignin degradation product, which comprises the following steps: adding lignin serving as a raw material into a water solvent of solid alkali, uniformly mixing the components, adding hydrogen peroxide, and carrying out oxidative degradation under the assistance of microwaves to obtain a lignin degradationproduct; mixing the lignin degradation product with ethanol to prepare a ligand solution, then mixing the ligand solution with a metal solution through a continuous flow production device, and carrying out self-assembly to synthesize a porous metal organic framework, wherein monomers of the lignin degradation product comprise coumaric acid, coniferic acid and sinapic acid. The nanopore material prepared by the invention has high crystallinity which can reach 99%. The preparation method is mild in experimental conditions, simple in process, low in pollution, low in energy consumption, high in product crystallinity, low in cost and capable of achieving large-scale production.

Description

technical field [0001] The invention relates to the field of metal-organic frameworks, in particular to a method for synthesizing a porous metal-organic framework based on lignin degradation products and a method for using the same to treat gas pollutants. Background technique [0002] With the development of the world economy and industry, the reserves of non-renewable resources such as petroleum and coal are becoming less and less, and the ecological and environmental problems are becoming more and more prominent. The use of renewable biomass resources to produce fuels and chemicals has become a future development trend. Lignin, cellulose and hemicellulose are important components in plant tissues and important biomass resources. Among them, lignin is widely distributed in nature and contains rich and unique aromatic structures, but currently more than 95% of lignin is simply treated as waste, such as burning to obtain low-grade heat, the utilization rate is extremely low,...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01J31/22C07C59/52C07C59/64C07C51/00C07D307/58B01D53/86B01D53/50B01D53/56B01D53/62
CPCB01J20/226B01J31/1691B01J31/2226C07C51/00B01D53/8628B01D53/8609B01D53/864B01D2257/402B01D2257/404B01D2257/502B01D2257/302B01J2531/16B01J2531/26B01J2531/72B01J2531/847C07C59/52C07C59/64Y02A50/20Y02C20/10
Inventor 杜鑫栾奕李秀娟
Owner 苏州铭泽新材料科技有限公司
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