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Method for hydrolyzing cellulose-containing plant waste by taking AlCl3 as catalyst in near-critical water

A plant waste and near-critical water technology, which is applied in the field of hydrolyzing cellulose-containing plant waste with AlCl3 as a catalyst in near-critical water, can solve the problems of low glucose yield, environmental pollution, and high energy consumption, and achieve ecological protection Environment, environmental protection, and the effect of resource utilization

Inactive Publication Date: 2010-08-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to disclose a kind of agricultural and forestry wastes hydrolyzed in near-critical water under the action of metal salt catalyst to produce fermentable sugar, organic acid and 5-hydroxymethylfurfural and other high value-added chemical raw materials and chemical products method to solve the problems of high energy consumption and serious environmental pollution in the current acid hydrolysis technology; and to screen a highly efficient metal salt catalyst for the near-critical hydrolysis of agricultural and forestry waste to solve the current supercritical hydrolysis of cellulose Problems such as low glucose yield

Method used

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  • Method for hydrolyzing cellulose-containing plant waste by taking AlCl3 as catalyst in near-critical water
  • Method for hydrolyzing cellulose-containing plant waste by taking AlCl3 as catalyst in near-critical water

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Choose 10g of peanut shells (after drying) as raw material, first use a high-speed pulverizer to pulverize it to about 50 mesh particles;

[0023] (2) mix the above particles with a certain amount of catalyst AlCl 3 Mix it with pure water and send it to a near-critical water reactor for hydrolysis; use nitrogen to sweep, empty and leak check the reactor body and pipelines in advance;

[0024] (3) Take 2g of peanut shell particles and send them to a reactor with a volume of 270ml, and heat them with electricity to make the peanut shells in the near-critical water reactor undergo a hydrolysis reaction; the reaction temperature is controlled at 200°C, and the reaction pressure is 1.8MPa. 3 The added amount is 40mg, and the reaction time is 2min.

[0025] Finally obtain hydrolyzate and analyze the productive rate of glucose, 5-HMF and acetic acid wherein with HPLC, the yield and the selectivity of each component in the present embodiment are as shown in table 1:

[00...

Embodiment 2

[0029] (1) choose 10g corn cob (after drying) as raw material, at first grind it to about 100 mesh particles with a high-speed pulverizer;

[0030] (2) mix the above particles with a certain amount of catalyst AlCl 3Mix it with pure water and send it to a near-critical water reactor for hydrolysis; use nitrogen to sweep, empty and leak check the reactor body and pipelines in advance;

[0031] (3) Take 2g of corncob particles and send them to a reaction kettle with a volume of 270ml, and heat them with electricity to make the corncobs in the near-critical water reaction kettle hydrolyze; the reaction temperature is controlled at 220°C, and the reaction pressure is: 2.0MPa, catalyst AlCl 3 The added amount is 60mg, and the reaction time is 3min.

[0032] Finally obtain hydrolyzate and analyze the productive rate of glucose, 5-HMF and acetic acid wherein with HPLC, the yield and the selectivity of each component in the present embodiment are as shown in table 2:

[0033] The y...

Embodiment 3

[0036] (1) choose 10g bagasse (after drying) as raw material, at first it is pulverized to about 150 mesh particles with a high-speed pulverizer;

[0037] (2) mix the above particles with a certain amount of catalyst AlCl 3 Mix it with pure water and send it to a near-critical water reactor for hydrolysis; use nitrogen to sweep, empty and leak check the reactor body and pipelines in advance;

[0038] (3) Get 2g of bagasse particles and send them to a reactor with a volume of 270ml, and heat it with electricity, so that the bagasse in the near-critical water reactor is hydrolyzed; the reaction temperature is controlled at 250°C, and the reaction pressure is 3.8MPa. 3 Addition amount: 120mg, reaction time: 3min.

[0039] Finally obtain hydrolyzate and analyze the productive rate of glucose, 5-HMF and acetic acid wherein with HPLC, the yield and the selectivity of each component in the present embodiment are as shown in table 3:

[0040] The yield of each component in the bagas...

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Abstract

The invention relates to a method for hydrolyzing a cellulose-containing plant waste by taking AlCl3 as a catalyst in near-critical water, which comprises the following steps: crushing the cellulose-containing plant waste serving as a raw material until the obtained powder is 50 to 200 meshes; and mixing the powder, AlCl3 serving as the catalyst and pure water and feeding the mixture into a near-critical water kettle to perform an reaction, wherein the reaction conditions include a mass ratio of the liquid material of 1-50:200, a reaction temperature of 200 to 300 DEG C, a reaction pressure of 1.8 to 5.0MPa, a reaction time of 1 to 10 minutes and an adding amount of the catalyst of 0.5 to 2.0mmol / l. Compared with the traditional acid hydrolysis, the method using the near-critical water and a metal salt serving as the catalyst to hydrolyze farming and forestry waste is environment friendly, does not generate pollutants, such as waste gas, protects environment, can effectively realize resource recycling of the farming and forestry waste and recycles waste materials.

Description

technical field [0001] The invention relates to a method for resource utilization of cellulose-containing plant waste, in particular to a method of using agricultural and forestry waste as raw material in AlCl 3 A method for preparing high value-added chemical raw materials and chemical products through near-critical hydrolysis under the action of a catalyst. Background technique [0002] The reduction of limited reserves of fossil fuels, the increasing demand for energy, and the environmental pollution and greenhouse effect caused by the burning of fossil fuels have brought great challenges to energy in the 21st century. Renewable energy will become the main body of the sustainable energy system in the future. Biomass energy is being paid more and more attention because of its good environmental effects such as renewability and zero carbon dioxide emission. If the lignocellulosic biomass in agricultural and forestry wastes is hydrolyzed to produce chemical raw materials su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K1/02C13K11/00C13K13/00C07C53/08C07C51/00C07D307/46C07C59/08
Inventor 朱宪马艳华姬文琦万雪亮樊琪朱广用钱晶
Owner SHANGHAI UNIV
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