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Method for producing furol by extruding plant stalk

A technology of plant straw and furfural, applied in organic chemistry and other directions, can solve problems such as air pollution, achieve the effects of uniform acid mixing of materials, reduce production costs, and expand the scope of raw materials

Inactive Publication Date: 2006-11-08
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for producing furfural by extrusion of plant straws, which solves the above four problems in the production of furfural by direct crushing of plant straws, and at the same time solves the air pollution caused by burning plant straws in some areas question

Method used

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  • Method for producing furol by extruding plant stalk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw material is corncobs air-dried in spring, and its water content is 23%. After the corncob is dedusted by a vibrating screen, it is crushed into 1-1.5cm corncob particles by a hammer mill, and then transported by the elevator to the acid mixing truck for acid mixing. The acid concentration is 5-10%, and the amount of acid used is kept at With a specific solid-to-liquid ratio, it is sent to the hydrolysis kettle through a belt conveyor. The volume of the hydrolysis kettle is 10 cubic meters, and the filling density of corncobs is 150-180kg / m 3 , using double tanks in series operation, after filling the hydrolysis tank, feed water vapor with a pressure of 0.45-0.75MPa, the hydrolysis temperature is 145-180°C, and the hydrolysis takes 2 hours to 4 hours. The furfural stock solution obtained by hydrolysis is introduced into the subsequent process, and the gross aldehyde is extracted, and the furfural is continuously refined to obtain commercial furfural. See Table 1...

Embodiment 2

[0023] The raw material is cut, pulverized and granulated corn stalk granules, and the water content of the granules is 27%. It is transported by the hoist to the acid mixing truck for acid mixing. The acid concentration is 5-20%, and the amount of acid used is kept at a specific solid-liquid ratio. It is sent to the hydrolysis tank through the belt conveyor, and the volume of the hydrolysis tank is 10 cubic meters. Rice, using double kettles in series operation, the packing density of corn stalk particles is 300-420kg / m 3 , After filling the hydrolysis kettle, feed water vapor with a pressure of 0.45-0.75MPa, and the hydrolysis temperature is 145-180°C, and the hydrolysis is performed for 2 hours to 4 hours. The furfural stock solution obtained by hydrolysis is introduced into the subsequent process, and the gross aldehyde is extracted, and the furfural is continuously refined to obtain commercial furfural. See Table 1 for details of the furfural quality detection indicators...

Embodiment 3

[0025] Cut corn stalks were used as raw materials, and the water content was 22%. After continuous acid mixing and extrusion equipment, the acid concentration is 5-10%, the amount of acid used is kept at a specific solid-to-liquid ratio, and it is continuously sent to the hydrolysis kettle. The volume of the hydrolysis kettle is 10 cubic meters, and a double kettle is used. Operated in series, the packing density of corn stalks after extrusion is 280-300kg / m 3 , After filling the hydrolysis kettle, feed water vapor with a pressure of 0.45-0.75MPa, and the hydrolysis temperature is 145-180°C, and the hydrolysis is performed for 2 hours to 4 hours. The furfural stock solution obtained by hydrolysis is introduced into the subsequent process, and the gross aldehyde is extracted, and the furfural is continuously refined to obtain commercial furfural. See Table 1 for details of the furfural quality detection indicators in this example. In this example, the yield of furfural is 5.5...

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Abstract

The plant stalk extruding process for producing furol belongs to the field of furol preparing technology. The process includes the following steps: 1. cutting plant stalk into 2-4 cm long segments; 2. mixing plant stalk segments with acid in a acid mixer, extruding in a screw extruding feeder, feeding into hydrolysis caldron, introducing water vapor for hydrolysis to obtain raw furol liquor, and returning the extruded dilute acid to the acid mixer; and 3. leading the raw furol liquor to the primary distillation tower to obtain raw furol and refining in a furol refining apparatus to obtain furol product. The production process is stable, reliable, low in production cost, high in furol yield and high in furol quality.

Description

technical field [0001] The invention relates to the field of furfural preparation, in particular to a method for preparing furfural by extruding plant stalks. Background technique [0002] Furfural is an organic chemical product that has not been synthesized from chemical raw materials but can only be extracted from plant materials such as agricultural waste. Furfural is an excellent selective solvent and a raw material for the production of various furan compounds. It is widely used in foundry binder, tetrahydrofuran, lubricating oil refining, organic synthesis, plastics, medicine, chemical anticorrosion, etc. [0003] Furfural has long been industrialized and mass-produced in the world. There are many production methods, but most of them adopt direct method. The direct method is to put the raw material containing polypentose into a hydrolysis kettle, and under the action of catalyst-sulfuric acid and heat, the polypentose is hydrolyzed into pentose, and at the same time,...

Claims

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Application Information

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IPC IPC(8): C07D307/50C07D307/48
Inventor 高绍丰魏丙栋索炫伟孟凡超刘军伟江成真
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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