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A method of catalytic oxygen oxidation of biomass to prepare oxygen-containing chemicals

A technology of oxygen oxidation and biomass, which is applied to the preparation of carbon-based compounds, chemical instruments and methods, and the preparation of organic compounds, etc. It can solve the problems of low formic acid yield, low yield, and high reaction energy consumption

Active Publication Date: 2020-10-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent (application number 201110099183.3) discloses a method for preparing acetone and calcium formate from biomass waste, which involves converting biomass into formic acid and acetic acid under severe reaction conditions, but the yield of formic acid is low and Reaction energy consumption is high
Chinese patent (Patent No. ZL 201080019836.6) discloses a method for producing formic acid using carbohydrates as raw materials. In this method, carbohydrates are prepared by two-step acid hydrolysis, but there are also problems such as low formic acid yield.
The method of using catalytic oxygen to oxidize biomass to prepare oxygen-containing carboxylic acid chemicals has achieved remarkable results. However, there are still problems in this method, that is, the yield of carboxylic acid products formic acid and acetic acid is low, the total yield is less than 60%, and the production rate of more than 40% The organic carbon of the substance is converted to the by-product CO 2

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In this embodiment, biomass glucose is used as raw material, oxygen is used as oxidant, and H 5 PV 2 Mo 10 o 40 As a catalyst, it catalyzes the oxidation of biomass to produce oxygen-containing chemicals. Biomass oxidation experiments were carried out in a 25cm 3 Carried out in a high temperature and high pressure reactor. 0.16g glucose and 6.0mL reaction aqueous solution (wherein the volume fraction content of methanol is 50%, H 5 PV 2 Mo 10 o 40 The mass fraction content is 1.67%) into the reactor (wherein the addition of biomass glucose is 2.67% by mass fraction), the reactor is sealed, and the air in the reactor is replaced with oxygen, and then filled with 3.0MPa of oxygen . Put the reactor into the pre-heated heating mantle and start stirring. When the reaction temperature reaches 160°C, start timing. After 10 minutes of reaction, take out the reactor and quench it with a cold water bath to terminate the reaction. After the reactor was cooled to room tem...

Embodiment 2

[0024] In this embodiment, biomass glucose is used as raw material, oxygen is used as oxidant, and H 5 PV 2 Mo 10 o 40 As a catalyst, it catalyzes the oxidation of biomass to produce oxygen-containing chemicals. Biomass oxidation experiments were carried out in a 25cm 3 Carried out in a high temperature and high pressure reactor. With 0.16g glucose and 6.0mL reaction aqueous solution (wherein the volume fraction content of ethanol is 50%, H 5 PV 2 Mo 10 o 40 The mass fraction content is 1.67%) into the reactor (wherein the addition of biomass glucose is 2.67% by mass fraction), the reactor is sealed, and the air in the reactor is replaced with oxygen, and then filled with 3.0MPa of oxygen . Put the reactor into the pre-heated heating mantle and start stirring. When the reaction temperature reaches 160°C, start timing. After 10 minutes of reaction, take out the reactor and quench it with a cold water bath to terminate the reaction. After the reactor was cooled to room...

Embodiment 3

[0027] This embodiment is a comparative experiment, when comparing without adding methanol or ethanol, the yield of the product and the CO 2 yield.

[0028] In this embodiment, biomass glucose is used as raw material, oxygen is used as oxidant, and H 5 PV 2 Mo 10 o 40 As a catalyst, it catalyzes the oxidation of biomass to produce oxygen-containing chemicals. Biomass oxidation experiments were carried out in a 25cm 3 Carried out in a high temperature and high pressure reactor. 0.16g glucose and 6.0mL reaction aqueous solution (wherein H 5 PV 2 Mo 10 o 40 , the mass fraction content is 1.67%) and joins in the reactor (wherein the addition amount of biomass glucose is 2.67%), the reactor is sealed, and the air in the reactor is replaced with oxygen, and then filled with 3.0MPa oxygen. Put the reactor into the pre-heated heating mantle and start stirring. When the reaction temperature reaches 160°C, start timing. After 10 minutes of reaction, take out the reactor and q...

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PUM

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Abstract

The invention relates to a method of preparing oxygen-containing chemicals by catalytic oxidation of biomass by employing a vanadium-containing catalyst in an aqueous solution. The method prepares the oxygen-containing chemicals (formic acid, acetic acid, formaldehyde and acetal) which are high in yield by selective oxidation of biomass by taking a soluble heteropolyacid H5PV2Mo10O40 as a catalyst, oxygen as an oxidant and an alcohol as an additive. Compared with a conventional preparation method, the method avoids environmental pollution by taking cheap and abundant biomass as a raw material and is of persistence. The method is mild in reaction condition, simple in process and high in yield of formic acid. By selecting the heteropolyacid H5PV2Mo10O40 which is soluble in water and an organic solvent as a catalyst, the catalyst not only is high in catalytic activity and good in selectivity, but also high in yield of product formic acid. Compared with other methods of preparing oxygen-containing chemicals by catalytic oxidation of biomass by employing other vanadium-containing catalytic systems, the method is capable of greatly inhibiting generation of a byproduct CO2, so that the utilization ratio of biomass raw material carbon is improved.

Description

technical field [0001] The invention relates to a method for preparing oxygen-containing chemicals, in particular to a method for preparing oxygen-containing chemicals by catalyzing oxygen oxidation of biomass. [0002] technical background [0003] In recent years, with the decreasing reserves of non-renewable energy sources such as petroleum fuels and the year-by-year changes in climate and environment caused by them, the dual pressure from economic development and environmental protection is increasing. In order to alleviate the contradiction between climate, environmental protection and economic growth, it is very important to find and utilize abundant renewable energy. Biomass energy has great development prospects due to the above characteristics, and has attracted increasing attention from researchers. [0004] Oxygen-containing chemicals (such as formic acid, acetic acid, formaldehyde, methylal, etc.) are important basic chemical raw materials. For example, formic a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/50C07C43/30C07C51/21C07C53/02C07C53/08C07C45/32C07C47/04C01B32/50
CPCC07C41/50C07C45/32C07C51/21C07C43/30C07C53/02C07C53/08C07C47/04
Inventor 吴卫泽鲁婷
Owner BEIJING UNIV OF CHEM TECH