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Method for producing furfural through gas-phase acid catalysis in cooperation with ethyl acetate extraction

A technology of ethyl acetate extraction and gas-phase acid catalysis, applied in the direction of organic chemistry and the like, can solve the problem of low yield and the like, and achieve the effects of easy handling, good industrial production and application prospects, popularization and application value, and high yield.

Inactive Publication Date: 2017-10-10
ENERGY RES INST CO LTD HENAN ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, although the furfural production process has been greatly improved in recent years, it still has problems such as low yield and difficult to solve process corrosion problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for the production of furfural by gas-phase acid catalysis and extraction of ethyl acetate provided by the application specifically comprises the following steps:

[0023] (1) Biomass material pretreatment, the biomass material (corncob) is crushed into a powder with a diameter of 0.5~1mm, and dried (moisture content is less than 2%);

[0024] (2) Hydrolysis treatment, adding the pretreated biomass material in step (1) to the high-pressure reactor, heating to 120°C, and feeding vaporized hydrogen chloride ethyl acetate vapor from the bottom (the concentration of the acid in the mixed gas is 0.1mol / L,), keep a certain pressure reaction (0.4Mpa) for 10min, the gas released from the top is condensed to obtain furfural, the product obtained is analyzed by gas chromatography, and the measurement results show that the yield of furfural reaches 61%.

Embodiment 2

[0026] The gas-phase acid catalysis provided by the application cooperates with the method for extracting ethyl acetate to produce furfural, similar to Example 1, only adjusting part of the production parameters as follows:

[0027] In step (2), heating to 130°C;

[0028] The final measurement results showed that the yield of furfural reached 64%.

Embodiment 3

[0030] The gas-phase acid catalysis provided by the application cooperates with the method for extracting ethyl acetate to produce furfural, similar to Example 1, only adjusting part of the production parameters as follows:

[0031] In step (2), heating to 140°C;

[0032] The final measurement results showed that the yield of furfural reached 81%.

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PUM

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Abstract

The invention belongs to the technical field of furfural preparation technologies and particularly relates to a method for producing furfural through gas-phase acid catalysis in cooperation with ethyl acetate extraction. The method comprises the steps as follows: (1) biomass material pretreatment; (2) hydrolysis treatment and the like. During hydrolysis treatment, vaporized hydrogen chloride and ethyl acetate mixed gas is introduced, the concentration of hydrogen chloride in the mixed gas is 0.1-1 mol / L, a reaction is conducted under the pressure of about 0.3-0.5 MPa for 2-30 min, gas released from the top is condensed, and a hydrolysate product containing furfural is obtained. The gas-phase catalytic hydrolysis method is adopted, the biomass material is hydrolyzed under the condition of gas phase acid, and the furfural is prepared through ethyl acetate extraction. With the adoption of the method, the hydrolysis reaction happens between gas and solid, solvent extraction is utilized, and thus, the furfural yield is better increased; besides, a liquid phase is better avoided, side reactions such as furfural polymerization and the like are avoided, and the furfural preparation effect is further stabilized.

Description

technical field [0001] The application belongs to the technical field of furfural preparation technology, and in particular relates to a method for producing furfural through gas-phase acid catalysis and extraction of ethyl acetate. Background technique [0002] Furfural and its molecular structure were first discovered by German chemist DOEBERNIER in 1821, and until the 1920s, the first company of the American Quaker Oats Company realized the industrial production of furfural. Using acid catalysis technology to convert pentosan-containing fiber raw materials into furfural is a method commonly used by furfural enterprises. The acidic catalysts used are mainly classified into inorganic acids, organic acids, metal salts with Lewis acidity and solid acids. Among them, inorganic acids are the most commonly used catalysts at present, and sulfuric acid and hydrochloric acid are commonly used. [0003] At present, the methods for producing furfural in the world are mainly divided...

Claims

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Application Information

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IPC IPC(8): C07D307/50
CPCC07D307/50
Inventor 雷廷宙任素霞林鹿杨延涛徐海燕董莉莉张修强
Owner ENERGY RES INST CO LTD HENAN ACADEMY OF SCI