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Method for preparing magnetic nano-solid acid catalyst from biomass hydrolysis and liquefaction residues

A solid acid catalyst, magnetic nano technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as shortages, energy waste, etc., and achieve simple preparation process, good catalytic effect, and raw materials Inexpensive effect

Active Publication Date: 2014-08-13
吉林栩融科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing biomass-based magnetic nanometer solid acid catalyst using biomass hydrolysis and liquefaction residue as raw material, so as to improve the treatment and recycling of biomass hydrolysis and liquefaction residue, and the purpose is to solve the existing energy waste and shortages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the steps are as follows

[0027] 1) Preparation of carbon-based raw materials

[0028] Take 4g of corn stalk liquefaction residue dissolved in 10ml 1,4-dioxane, stir well, and filter with a sand core funnel to obtain the filtrate and residue, keep the residue, dry the corn stalk liquefaction residue at 80°C as carbon base Raw material spare;

[0029] 2) Preparation of magnetic nanocarbon-based precursors

[0030] Add 8ml of dichloromethane solution to the liquefied residue of corn stalks prepared in step 1), stir to make it fully dissolved to obtain a solution, and add the solution to 220ml of superparamagnetic magnetic nano-Fe 3 o 4 In the process, stir evenly at a rate of 300r / min, and obtain a magnetic nano-carbon-based precursor after drying at a temperature of 80°C;

[0031] 3) Oxidation of magnetic nanocarbon-based precursors

[0032] The magnetic nano-carbon-based precursor prepared in step 2) was mixed with 2.2 g p-toluenesulfonic acid, grou...

Embodiment 2

[0037] Embodiment 2, the steps are as follows:

[0038] 1) Preparation of carbon-based raw materials

[0039] Take 4g of corn stalk liquefaction residue dissolved in 10ml 1,4-dioxane, stir well, and filter with a sand core funnel to obtain the filtrate and residue, keep the residue, dry the corn stalk liquefaction residue at 90°C as the carbon base Raw material spare;

[0040] 2) Preparation of magnetic nanocarbon-based precursors

[0041] Add 12ml of dichloromethane solution to the liquefied residue of corn stalks prepared in step 1), stir to make it fully dissolve to obtain a solution, and add the solution to 260ml of superparamagnetic magnetic nano-Fe 3 o 4 , stir evenly at a rate of 400r / min, and dry at a temperature of 90°C to obtain a magnetic nanocarbon-based precursor;

[0042]3) Oxidation of magnetic nanocarbon-based precursors

[0043] Mix the magnetic nanocarbon-based precursor prepared in step 2) with 3 g of p-toluenesulfonic acid, grind to 120 mesh, transfer ...

Embodiment 3

[0048] Embodiment 3: the steps are as follows

[0049] 1) Preparation of carbon-based raw materials

[0050] Take 4g of corn stalk liquefaction residue dissolved in 10ml 1,4-dioxane, stir well, and filter with a sand core funnel to obtain the filtrate and residue, keep the residue, dry the corn stalk liquefaction residue at 100°C as the carbon base Raw material spare;

[0051] 2) Preparation of magnetic nanocarbon-based precursors

[0052] Add 16ml of dichloromethane solution to the liquefied residue of corn stalks prepared in step 1), stir to make it fully dissolve to obtain a solution, and add the solution to 300ml of superparamagnetic magnetic nano-Fe 3 o 4 In the process, stir evenly at a rate of 500r / min, and obtain a magnetic nanocarbon-based precursor after drying at a temperature of 100°C;

[0053] 3) Oxidation of magnetic nanocarbon-based precursors

[0054] The magnetic nano-carbon-based precursor prepared in step 2) was mixed with 3.3 g p-toluenesulfonic acid,...

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Abstract

The invention discloses a method for preparing a magnetic nano-solid acid catalyst from biomass hydrolysis and liquefaction residues. The method is characterized by comprising the following steps: preparation of a carbon-based material, preparation of a magnetic nano-carbon-based precursor, oxidation of the magnetic nano-precursor, carbonization reaction and sulfonation reaction. The catalyst can be used in hydrolysis reaction, esterification reaction, olefin hydration reaction, alkylation reaction, acetalization and ketalization reaction and the like. Compared with a conventional magnetic catalyst which is prepared by taking magnetic Fe3O4 particles as cores, the catalyst has the higher stability. Compared with a conventional carbon-based catalyst, magnetic particles contained in the catalyst are distributed in internal pores, so that the catalyst has the larger surface area for loading functionalized functional groups. The catalyst has the advantages that the preparation method is simple, the catalytic efficiency is high, the magnetic nano-particles are distributed uniformly, the specific surface area is large, the catalyst is easily separated from products, and the waste of resources is reduced; the method is one of methods for recycling the biomass hydrolysis and liquefaction residues.

Description

technical field [0001] The invention relates to a catalyst preparation method, which is a method for preparing a magnetic nanometer solid acid catalyst by using biomass hydrolysis and liquefaction residue. Background technique [0002] Due to the increasingly scarce and non-renewable petrochemical resources and the resulting environmental problems, the utilization of renewable biomass resources has attracted more and more attention from all over the world. In recent years, due to its huge resources and renewable characteristics, biomass energy has played an important role in solving the dual pressures of economic growth and environmental protection faced by human beings, establishing a sustainable energy system, converting energy structures, recycling waste resources, and promoting social economy. Development and improvement of the ecological environment have very important practical significance and far-reaching historical significance, so more and more attention has been p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02
Inventor 李翔宇李学琴时君友庞久寅
Owner 吉林栩融科技有限公司
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