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Method for producing furfural

A production method, furfural technology, applied in the field of bio-based products, can solve the problems of low furfural production efficiency, pollution, and no breakthrough progress, and achieve the effect of facilitating continuous and good operation, reducing investment, and avoiding special requirements

Inactive Publication Date: 2013-03-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

China is a major producer and exporter of furfural, but basically still uses the technology of the 1920s and has not made any breakthroughs
The development of new furfural production technology is of great significance to solve the problems of low furfural production efficiency and serious pollution and to realize the harmonious development of economic growth and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The method of the invention is used to produce furfural by using the washing liquid produced by pretreating corn stalks with calcium chloride.

[0017] (1) First, crush the corn stalks into 2mm particles with an RT-34S pulverizer, wash with water to remove impurities such as sand and stones in the raw materials, and mix 100g of corn stalks (dry weight) according to the solid-liquid ratio of 1:10 (m / v) Add 1000mL of calcium chloride solution with a concentration of 62.5% (m / m) to the mixture, mix well, place the mixed material in a MR-3 microwave reactor for microwave heating, adjust the power so that the temperature of the material is 160°C, and process The time is 10 minutes; (2) After the treatment is completed, the calcium chloride in the solid is washed three times with 2000ml of water in the washing tank, and 2g of SO is added to the liquid part obtained after solid-liquid separation 4 2- / TiO 2 Solid superacid catalyst; (3) Add the catalyst-added liquid into a t...

Embodiment 2

[0019] The method of the invention is used to produce furfural by using the washing liquid produced by pretreating corn stalks with calcium chloride.

[0020] (1) First, crush the corn stalks into 2mm particles with an RT-34S grinder, wash with water to remove impurities such as sand and stones in the raw materials, and mix 100g of corn stalks (dry weight) according to the solid-liquid ratio of 1:5 (m / v) Add 500mL of calcium chloride solution with a concentration of 62.5% (m / m) to the mixture, mix evenly, place the mixed material in a MR-3 microwave reactor for microwave heating, adjust the power so that the temperature of the material is 160°C, and process The time is 10 minutes; (2) After the treatment is completed, use 1500mL of water in the washing tank to wash off the calcium chloride in the solid for three times, and add 15g of mordenite molecular sieve catalyst to the liquid part obtained after solid-liquid separation; (3) Add The liquid containing the catalyst was adde...

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Abstract

The invention discloses a method for producing furfural, which is characterized by coupling with a lignocellulose calcium chloride pre-processing technology, and producing furfural through converting xylose in a calcium chloride recovered solution obtained after the calcium chloride pre-processing. The method provided by the invention is basically characterized by comprising the following steps of: adding solid acid catalyst in a certain proportion in the calcium chloride recovered solution; heating by microwave; continuously condensing the recovered solution under a normal pressure; meanwhile, continuously increasing temperature of a reacting system; catalyzing cyclodehydration of the xylose by the solid acid catalyst under the normal pressure and at a high temperature to obtain furfural; evaporating furfural together with water or taking out by filled nitrogen and condensing to obtain a furfural solution, wherein the crude furfural solution can be rectified to obtain high-purity furfural. After reaction, a liquid-solid separation is carried out on the calcium chloride solution, the solid acid catalyst is recycled for catalytic conversion, and the calcium chloride solution is recycled for pre-processing lignocellulose. The method for producing the furfural is organically coupled with the pre-processing, so the xylose conversion rate is high, the solid catalyst can be recycled, and a high-pressure and corrosion resistant reactor is not used.

Description

technical field [0001] The invention belongs to the technical field of bio-based products, in particular to a furfural production method. Background technique [0002] Furfural is an important organic chemical raw material and chemical solvent widely used in petroleum refining, petrochemical industry, chemical industry, medicine, food, synthetic rubber, synthetic resin and other industries. Recently, furfural and its derivatives have been used in gasoline blending and in the development of new biofuels and bioplastics. As international liquid fuel production peaks, there will be increasing demand for chemicals produced using furfural as an important intermediate. In the face of this situation, it is necessary to develop a new high-efficiency furfural production process. In 1922, the American Quaker Oats Company first realized the industrialization of furfural, which can only be produced by hydrolysis of plant fiber raw materials so far. Hemicellulose is hydrolyzed to prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/50
CPCY02P20/584
Inventor 徐建李宏强
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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