Method for separating lignose and cellulose in licorice waste slag by means of ultrasonic technology

An ultrasonic and lignin technology, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve the problems of resource waste, environmental pollution, energy consumption, etc., and achieve the effects of avoiding degradation, high yield and purity, and short action time

Inactive Publication Date: 2009-02-25
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant report on the use of ultrasonic-assisted organic solvent delignification
Aiming at the problem of environmental pollution and resource waste caused by the traditional lignin and cellulose separation process using alkali cooking method and sulfite method, and energy consumption of high boiling alcohol solvent method, a low energy consumption, mild and efficient separation method is invented. The method of licorice waste residue lignin and cellulose is the main direction of research in this field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Accurately weigh 20.0 g of licorice waste residue, add 200 mL of methyl isopropyl ketone (MIBK)-ethanol-water mixed solvent (MIBK:ethanol:water=50:30:20) to make a cloudy solution. At a temperature of 30° C., the ultrasonic treatment time is 60 min, the ultrasonic power used is 950 W, and the ultrasonic frequency is 20 kHz. After the ultrasonic treatment, transfer the container containing the treatment solution to a constant temperature water bath at 40°C for 2 hours, and suction filter after the precipitation is complete. Add 280 mL of water to the filtrate, separate the MIBK phase, recover MIBK by rotary evaporation, and dry the extract to obtain 3.1 g of lignin. The filter cake was vacuum dried at 80°C for 4 hours to obtain 7.6 g of cellulose.

Embodiment 2

[0019] Accurately weigh 20.0 g of licorice waste residue, add 200 mL of methyl isopropyl ketone (MIBK)-ethanol-water mixed solvent (MIBK:ethanol:water=50:30:20) to make a cloudy solution. At a temperature of 40° C., the ultrasonic treatment time is 90 minutes, the ultrasonic power used is 700 W, and the ultrasonic frequency is 20 kHz. After the ultrasonic treatment, transfer the container containing the treatment solution to a constant temperature water bath at 40°C for 5 hours, and suction filter after the precipitation is complete. Add 280 mL of water to the filtrate, separate the MIBK phase, recover MIBK by rotary evaporation, and dry the extract to obtain 3.5 g of lignin. The filter cake was vacuum-dried at 80° C. for 5 hours to obtain 7.8 g of cellulose.

Embodiment 3

[0021] Accurately weigh 20.0 g of licorice waste residue, add 200 mL of methyl isopropyl ketone (MIBK)-ethanol-water mixed solvent (MIBK:ethanol:water=50:30:20) to make a cloudy solution. At a temperature of 50° C., the ultrasonic treatment time is 120 min, the ultrasonic power used is 600 W, and the ultrasonic frequency is 40 kHz. After the ultrasonic treatment, transfer the treatment liquid to a constant temperature water bath at 40°C for 3 hours. After the precipitation is complete, filter with suction, add 280 mL of water to the filtrate, separate the MIBK phase, recover MIBK by rotary evaporation, and dry the extract to obtain 4.0 g of lignin. The filter cake was vacuum dried at 80°C for 3 hours to obtain 7.9 g of cellulose.

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Abstract

The invention relates to a method for separating lignin and cellulose from the wastes generated during the processes of extracting flavone, glycyrrhizic acid or polyoses from the traditional Chinese herb of liquorice. The method includes the following steps: (1) the waste residue of liquorice is added into the mixed solvent of methyl isopropyl ketone-ethanol-water and is manufactured into a turbid liquid; (2) the turbid liquid is treated by ultrasonic and then is stood for a certain period of time and filtered to obtain the filtrate and filter residues; (3) after the filtrate is condensed in vacuum and the solvent is recycled, a crystal is obtained; then the obtained filtrate is filtered and dried to obtain the lignin; the filter residues are directly dried to obtain the cellulose. The method for separating lignin and cellulose from the waste residue of the liquorice by utilizing the ultrasonic technology can overcome the defects of environment pollution and resource wasting caused by a soda boiling method and sulphite as well as the defect of high energy consumption caused by a high-boiling alcohol solvent method. The method creates a new approach for the comprehensive utilization of the waste residues of the liquorice.

Description

1. Technical field [0001] The invention relates to a method for separating lignin and cellulose from waste produced in the process of extracting flavonoids, glycyrrhizic acid or polysaccharides from traditional Chinese herbal medicine licorice. 2. Background technology [0002] Licorice is the root and rhizome of the leguminous Glycyrrhiza plant, and it is a commonly used species in traditional Chinese medicine. At present, there are many manufacturers in the central and western regions of my country related to the extraction and production of active ingredients in licorice, and a large amount of licorice waste residue remaining after extraction is thrown away or burned as waste. Our country consumes 6×10 4 tons of hay, recycled pure lignin 1.2 x 10 4 ~1.5×10 4 tons, cellulose 1.8 x 10 4 ~2.0×10 4 Tons, a great asset. Therefore, the utilization of licorice residue should attract people's attention. Licorice residue is rich in lignin and cellulose. If it can be used to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00
Inventor 张黎明季佳佳赵希高文远曹宇尹东剑
Owner TIANJIN UNIV OF SCI & TECH
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