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A method for biomass co-production of furfural and biochar

A technology of biomass and biochar, applied in carbon preparation/purification, organic chemistry, etc., can solve the problems that the yield can only reach 45%-55% of the theoretical value, cellulose and lignin are difficult to reuse, etc. Reach the effect of reducing production cost and water consumption

Active Publication Date: 2020-05-05
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furfural has been industrially produced from 1922 to the present, and the commonly used process conditions are biomass, such as corn cobs reacting at high temperature (140-185°C) for 3-10 hours, and the amount of sulfuric acid is 3%, which is limited by various conditions. The maximum yield of furfural in production can only reach 45%-55% of the theoretical value
At the same time, there are a large number of side reactions such as condensation and esterification in the process of furfural production, and a large amount of colloids are formed to attach to the surface of unreacted cellulose and lignin. Therefore, it is difficult to reuse the cellulose and lignin in the waste residue. Generally, only As a fuel for the production of stripping steam

Method used

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  • A method for biomass co-production of furfural and biochar
  • A method for biomass co-production of furfural and biochar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Sieve the dried and pulverized corncobs, put the corncobs passing through 40-60 mesh into the high-pressure reactor, and add water, toluene and sulfuric acid so that the mass concentration of the reaction substrate is 9%, and the water and the reaction bottom The mass ratio of the solution is 0.5:1, and the content of sulfuric acid in the solution is 0.2% (mass fraction). After closing the reactor, nitrogen gas was introduced to make the system pressure 1.5MPa. Turn on the temperature control system of the reaction device and the heat conduction oil circulation system to heat the high-pressure reactor, and start timing when it is heated to 160°C. After 10 minutes of reaction, stop heating and release the material for solid-liquid separation. The separated residue is biochar , the separated liquid enters vacuum distillation to recover furfural and toluene; the liquid product and solid product in the material can be analyzed respectively: the furfural yield is 66%, the co...

Embodiment 2

[0023] Sieve the dried and pulverized bagasse, and put the bagasse material of 20-60 mesh into the high-pressure reactor, and add water, toluene and sulfuric acid, so that the mass concentration of the reaction substrate is 20%, and the water and the reaction bottom The mass ratio of the solution is 1:1, and the content of sulfuric acid in the solution is 2% (mass fraction). After closing the reactor, nitrogen gas was introduced to make the system pressure 1 MPa. Turn on the temperature control system of the reaction device and the heat conduction oil circulation system to heat the high-pressure reactor, and start timing when it is heated to 180°C. After 15 minutes of reaction, stop heating and release the material for solid-liquid separation. The separated residue is biochar , the separated liquid enters the vacuum distillation to reclaim furfural and toluene; the liquid product and solid product in the material are respectively analyzed and obtained: the furfural yield is 60...

Embodiment 3

[0025] Sieve the dried and pulverized sweet sorghum, put the sweet sorghum passing 60-80 mesh into the high-pressure reactor, and add water, toluene and sulfuric acid so that the mass concentration of the reaction substrate is 15%, and the water and the reaction substrate The mass ratio of the solution is 0.8:1, and the content of sulfuric acid in the solution is 1% (mass fraction). After closing the reactor, nitrogen gas was introduced to make the system pressure 0.5 MPa. Turn on the temperature control system of the reaction device and the heat conduction oil circulation system to heat the high-pressure reactor, start timing when it is heated to 170°C, stop heating after 12 minutes of reaction and release the material for solid-liquid separation, and the separated residue is biochar , the separated liquid enters the vacuum distillation to recover furfural and toluene; the liquid product and solid product in the material are analyzed respectively: the yield of furfural is 55%...

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Abstract

The invention discloses a method for co-production of furfural and biochar by biomass. The method comprises the following steps: throwing a biomass raw material into a high-pressure reactor, adding amixed solvent composed of water and toluene, adding sulfuric acid, sealing the reactor, introducing a nitrogen gas into the reactor to make pressure in the reactor reach 0.5-2 MPa, performing heating,after temperature in the reactor reaches 160-180 DEG C, starting the time, performing a reaction for 10-15 min, discharging a reaction material, performing solid-liquid separation, wherein the separated solid residues are the biochar, and performing reduced-pressure distillation on the separated liquid to recover the furfural and the toluene. The method disclosed by the invention simultaneously realizes production of the furfural and preparation of the biochar in a short time, and effectively shortens production time of the furfural and significantly improves a yield of the furfural; and at the same time, the method has extremely low water consumption, so that two-phase separation is not needed after the reaction is performed, and the method can be directly used on equipment in a factory,realize energy saving and emission reduction, and greatly reduce production costs of a furfural product.

Description

Technical field: [0001] The invention relates to the technical field of biomass energy chemical industry, in particular to a method for co-producing furfural and biochar from biomass. Background technique: [0002] Furfural is an important chemical intermediate. Furfural and its derivatives have broad application prospects in the fields of solvents, resin synthesis, fragrances, cosmetics, plastics and nylon products. Furfural has been industrially produced from 1922 to the present, and the commonly used process conditions are biomass, such as corn cobs reacting at high temperature (140-185°C) for 3-10 hours, and the amount of sulfuric acid is 3%, which is limited by various conditions. The maximum yield of furfural in production can only reach 45%-55% of the theoretical value. At the same time, there are a large number of side reactions such as condensation and esterification in the process of furfural production, and a large amount of colloids are formed to attach to the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/48C07D307/50C01B32/05
CPCC01B32/05C07D307/48C07D307/50
Inventor 王琼亓伟刘姝娜余强王闻谭雪松庄新姝袁振宏王忠铭
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI