System and method for continuously preparing furfural from lignocellulosic raw materials

A technology for lignocellulose and raw materials, which is applied in the field of continuous preparation of furfural by two-step method, can solve the problems of inability to continuously react, many reaction by-products, low production efficiency, etc., so as to avoid side reactions, reduce the generation of by-products, improve The effect of production efficiency

Active Publication Date: 2021-05-28
易高生物质能技术有限公司
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  • Description
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  • Application Information

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Problems solved by technology

The present invention provides a system for continuously preparing furfural by using lignocellulosic raw materials, and also provides a method for continuously preparing furfural by using lignocellulosic raw materials. There are many reaction by-products, high labor intensity, high production cost, low production efficiency, serious environmental pollution and other problems, which can effectively improve labor productivity, reduce labor intensity, increase furfural yield, avoid side reactions as much as possible, and reduce unit energy consumption , less environmental pollution, rational use of energy

Method used

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  • System and method for continuously preparing furfural from lignocellulosic raw materials
  • System and method for continuously preparing furfural from lignocellulosic raw materials
  • System and method for continuously preparing furfural from lignocellulosic raw materials

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Embodiment

[0097] use as figure 2 The shown system utilizes lignocellulosic raw materials to continuously prepare furfural.

[0098] The lignocellulosic raw material is continuously fed into the raw material mixing unit 20, wherein the raw material mixing unit 20 includes a spiral mixer 21, and the raw material is mixed uniformly with the first acid solution (as shown by arrow F) in a certain proportion in the spiral mixer 21 , to form a mixture and continuously output the mixture, the first acid liquid is a part of the acid liquid at the bottom of the stripping reaction tower 60, and the acid liquid heat exchanger 110 is heat-exchanged to cool down to 60°C.

[0099] The uniformly mixed solid-liquid mixture enters the feed unit 30, which includes a screw feeder 31 and the first tapered feeder 32; the mixture enters the screw feeder 31 continuously through the first tapered feeder 32, and the screw feeder The feeder 31 has a compression function, which includes a compression section and...

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Abstract

The invention relates to a system and method for continuously preparing furfural by using lignocellulosic raw materials. The system includes an acid liquid output unit, a raw material mixing unit, a feeding unit, a main reaction unit, a discharging unit, a stripping reaction tower, and a separation unit and purification unit. The method comprises an acid liquid output step, a raw material mixing step, a feeding step, a hydrolysis reaction step, a material discharging step, a stripping reaction step, a separation step and a purification step. The present invention is a continuous production system in the true sense, which realizes the continuous acquisition of products in time, reduces labor intensity and improves production efficiency. The design of the whole process is reasonable, the yield of furfural is high, and the unit energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of furfural production, in particular to the technology of continuous preparation of furfural by two-step method. Background technique [0002] Furfural (also known as furan formaldehyde) is an important chemical product, which is widely used in industrial fields such as synthetic plastics, medicine, and pesticides. The global demand for furfural is huge every year. Furfural can selectively extract unsaturated components from petroleum and vegetable oils, and can also extract aromatic components from lubricating oil and diesel oil. With the aggravation of the energy crisis and the requirement of environmental protection, more and more attention has been paid to the production of high value-added furfural from renewable agricultural and forestry wastes. [0003] At present, on an industrial scale, the only way to obtain furfural is still to use corncobs as raw materials through hydrolysis. According to whet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/50
CPCC07D307/50
Inventor 徐彬萧锦诚吕俊德周晓莹
Owner 易高生物质能技术有限公司
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