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A kind of process of bagasse producing furfural

A technology of bagasse and furfural, applied in the direction of organic chemistry and the like, can solve the problems of large amount of waste water, low energy consumption, low yield, etc., and achieve the effects of improving conversion rate, reducing side reactions, and improving extraction rate

Active Publication Date: 2021-06-18
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, bagasse is directly used to continuously extract hemicellulose to directly produce furfural, and this process is environmentally friendly, has no sewage discharge, low energy consumption, and high yield, which can solve the problems of large amount of waste water, serious pollution, and high yield in the prior art. Inferior disadvantages

Method used

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  • A kind of process of bagasse producing furfural
  • A kind of process of bagasse producing furfural
  • A kind of process of bagasse producing furfural

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A kind of bagasse is produced the technique of furfural, and this technique comprises the following steps:

[0061] 1) Bagasse (the part left after sugarcane is mechanically squeezed and extracted) is dipped in double-helix countercurrent at a temperature of 40°C to remove residual sucrose and sand and other impurities;

[0062] 2) The soaked bagasse and the lye with a mass concentration of 0.2% are subjected to countercurrent leaching in a QBT1849-1993 double-helix continuous leaching device with a solid-to-liquid ratio of 1:4 and a reaction time of 30 minutes. Then utilize the wringer device attached to the extruder to wring out for later use. The water content in the wrung out bagasse is 40wt%; the extruded water is recycled as washing water after precipitation. The base used was KOH.

[0063] 3) In order to prevent the degradation of hemicellulose and lignin, the squeezed material is subjected to low-temperature and high-pressure steam explosion, the steam explosio...

Embodiment 2

[0073] 1) Bagasse is soaked in double-helix countercurrent at a temperature of 40°C to remove residual sucrose and sand and other impurities;

[0074] 2) The washed bagasse and lye with a concentration of 0.2% are subjected to countercurrent immersion in a QBT1849-1993 double-helix continuous leaching device with a solid-to-liquid ratio of 1:4 and a reaction time of 30 minutes. The drying device squeezes the bagasse for later use, and the water content in the squeezed bagasse is 30wt%; the extruded water is recycled as washing water after precipitation.

[0075] 3) In order to prevent the degradation of hemicellulose and lignin, the squeezed material is subjected to low-temperature and high-pressure steam explosion, the steam explosion temperature is 120°C, the time is 100S, and the pressure is 1.9MPa (heated to 120°C with steam first, and then pressurized with compressed air to 1.9MPa);

[0076] 4) The steam-exploded material is treated with "a device for extracting xylose f...

Embodiment 3

[0082] A kind of bagasse is produced the technique of furfural, and this technique comprises the following steps:

[0083] 1) Bagasse is soaked in double-helix countercurrent at a temperature of 40°C to remove residual sucrose and sand and other impurities;

[0084] 2) The washed bagasse and lye with a concentration of 0.2% are subjected to countercurrent immersion in a QBT1849-1993 double-helix continuous leaching device with a solid-to-liquid ratio of 1:4 and a reaction time of 30 minutes. The drying device is squeezed out for use; the extruded water is recycled as washing water after precipitation.

[0085] 3) In order to prevent the degradation of hemicellulose and lignin, the squeezed material is subjected to low-temperature and high-pressure steam explosion, the steam explosion temperature is 120°C, the time is 100S, and the pressure is 1.9MPa (heated to 120°C with steam first, and then pressurized with compressed air to 1.9MPa);

[0086] 4) The steam-exploded material...

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Abstract

The invention belongs to the technical field of chemical industry, in particular to a process for producing furfural from bagasse. The process includes the following steps: 1) Wash the bagasse to remove impurities, and wash away the residual sucrose and sand; 2) Mix the washed bagasse with lye, and carry out countercurrent reaction and squeeze dry for later use; 3) Instantaneous low temperature Steam explosion treatment; 4) Wash the material after steam explosion; 5) Add KOH solution for continuous countercurrent extraction; 6) Hemicellulose, acetic acid and solvent enter the emulsifier for emulsification, etc. Because the present invention uses low-temperature steam explosion, retains hemicellulose and adopts low-temperature alkaline solution to extract, improves the extraction rate of hemicellulose; Adopt existing technology, promptly utilize methyl alcohol to be dissolved in alkaline solution hemicellulose separation and The physical and chemical characteristics of precipitation, methanol forms a hydrophobic effect, destroys the affinity effect between hemicellulose and alkaline solution, promotes the efficient separation of hemicellulose from methanol alkaline solution and in situ precipitation, so as to realize the high efficiency of hemicellulose extract.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, in particular to a process for producing furfural from bagasse. Background technique [0002] Furfural is mainly produced by the dehydration of pentose, so the fiber biomass containing polypentose (hemicellulose) can be used as a raw material for the production of furfural. The biomass raw materials used to produce furfural in industry mainly include corncobs, corn stalks, rice husks, bagasse, wheat straw, sunflower seed husks, cottonseed husks, palm trees, peanut shells, waste wood, etc. Under the same conditions, the higher the pentose content, the more beneficial to improve the aldehyde yield. In terms of pure dry biomass, the theoretical furfural production per gram of corn cob is 0.22g, bagasse is 0.17g, corn stalk is 0.165g, sunflower husk is 0.16g, rice husk is 0.12g, hardwood is 0.15~ 0.17g, pentose sugar exists in the form of polypentose sugar (commonly called hemicellulos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/50
Inventor 郭志刚唐印雷林刘朝慧李旭初李刚王明权
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD