Method for converting hemicellulose to acetal and furfural in low-boiling-point solvent
A low-boiling-point solvent and hemicellulose technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of low efficiency, secondary pollution, and low selectivity of furfural production process, and achieve large-scale Large-scale application, wide application range and simple reaction system
Pending Publication Date: 2021-02-05
NANKAI UNIV +1
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AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to solve the problems of low efficiency, low selectivity, high cost and easy to cause secondary pollution in the existing furfural production process, and to provide a method for converting hemicellulose into acetal and furfural in a low boiling point solvent
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] A method for converting hemicellulose into acetal and furfural in a low-boiling solvent: 0.05 g of titanyl sulfate, 0.05 g of xylan, 0.1 g of 1,3-propanetriol and 1 g of tetrahydrofuran are added to the reactor , heated to 190° C., and reacted for 3 hours under the condition of stirring at 800 rpm. The conversion of hemicellulose was 100%, and the yield of acetal was 79%. Add 3 milliliters of water to the system, stir for 4 hours under the condition of heating at 50° C., and the yield of furfural is 75%.
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The invention belongs to the field of solid waste recycling and biomass-based chemicals, and discloses a method for converting hemicellulose into acetal and furfural in a low-boiling-point solvent, which is characterized by comprising the following steps of: uniformly mixing a hemicellulose-rich raw material, an acid catalyst, an alcohol raw material, water and a low-boiling-point organic solvent;adding the mixture into a sealed reactor or an open reactor with a condensing device; heating to 25-200 DEG C, and reacting under the condition of magnetic stirring or mechanical stirring; and afterthe reaction is finished, adding a certain amount of water into the system, and hydrolyzing acetal into furfural under the conditions of heating and stirring; The reaction system provided by the invention is simple and wide in application range, the efficiency and selectivity of converting cellulose biomass into acetal and furfural can be greatly improved, the production cost is reduced, and large-scale application is realized.
Description
technical field [0001] The invention belongs to the fields of solid waste recycling and biomass-based chemicals, and in particular relates to a method for converting hemicellulose into acetal and furfural in a low boiling point solvent. Background technique [0002] Furfural is a compound formed by the dehydration and cyclization of biomass-derived five-carbon sugars. The furan ring and aldehyde functional groups contained in the furfural molecule make it have active chemical properties, so it can be used as a platform compound for the synthesis of furfuryl alcohol, furan, tetrahydrofuran, furoic acid and other chemicals, as well as for the synthesis of 2-methylfuran, ethyl Biofuels such as furfuryl ether. As an important chemical raw material, furfural has been widely used as a raw material for the production of extractants, solvents, vulcanizing agents, and the manufacture of pharmaceuticals, cosmetics, and spices. [0003] The industrial production of furfural mainly us...
Claims
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IPC IPC(8): C07D307/48C07C41/48C07C43/303
CPCC07D307/48C07C41/48C07C43/303
Inventor 候其东鞠美庭甄梅楠陈榕基吉奎
Owner NANKAI UNIV