A kind of pretreatment method of traditional Chinese medicine residue classification and utilization and its application

A technology of pretreatment and traditional Chinese medicine dregs, which is applied in the direction of fiber raw material treatment, pulping with organic compounds, papermaking, etc., can solve the problems of insufficient consideration of lignin recovery and value-added utilization, loss of carbohydrate components of herbal dregs, and limited fiber Recycling and utilization of raw materials and other issues, to achieve the effect of saving process costs, high overall utilization rate, and wide application range

Active Publication Date: 2022-07-26
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, there are still some problems in ionic liquid pretreatment: for example, ionic liquid has limited solubility to biomass, and it is often necessary to increase the temperature and prolong the treatment time to improve the pretreatment effect, which also leads to the increase of energy consumption and production cost; the existing process It is often limited to the regeneration and utilization of cellulose, and the recovery and value-added utilization of lignin have not been fully considered; in addition, a large amount of wastewater discharge is inevitable during the pretreatment process, which will also lead to secondary pollution
CN106702800A discloses a method for pretreating stalks with proton-type ionic liquids. The raw materials for synthesizing ionic liquids in this method are cheap and effectively remove lignin and hemicellulose, but the method still has high processing intensity and cannot recycle the main Product lignin; CN107142291A has announced a kind of method that organic solvent-aqueous solution improves acid-catalyzed ionic liquid pretreatment effect, uses common inorganic acid or solid acid catalyzed ionic liquid pretreatment, regeneration has obtained the cellulose product with less sediment, yet None of the acid-catalyzed ionic liquid systems mentioned in this scheme can recycle lignin; CN105755883A discloses a method for preparing ethanol and biochar by cascading the use of traditional Chinese medicine dregs. The dregs are used for bioethanol fermentation after treatment with dilute alkali, and the fermentation residue is used to prepare Biochar, but the dilute alkali treatment used in this scheme will lose a large amount of carbohydrate components in the dregs, and produce a large amount of black liquor and waste water

Method used

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  • A kind of pretreatment method of traditional Chinese medicine residue classification and utilization and its application

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Experimental program
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Effect test

Embodiment 1

[0055] The herbal tea dregs (cellulose 36.5%, hemicellulose 18.5%, lignin 24.2%) were pulverized and passed through a 40-mesh sieve, and 5g of the dregs and the pretreatment solution were weighed and added to the reactor, and the solid-to-liquid ratio was 1:20 (g : mL), ionic liquid [Bmim]Cl in the pretreatment solution: water: p-toluenesulfonic acid = mass ratio 80%: 19%: 1%; treated at 130° C. for 2 h to obtain a treatment solution.

[0056] After the treatment solution was cooled to room temperature, under stirring with a glass rod, add a 95% (v / v) ethanol solution equivalent to 1.5 times the volume of the treatment solution, let it stand for half an hour, and centrifuge (3000rpm, 5min), and the obtained solution was named as Solution A, the obtained solid A is the enriched product of heald fibers. Then, the solid A was washed twice with an ethanol solution equivalent to 0.8 times the volume of the treatment solution, and dried at 55° C. for use. The washing solution and s...

Embodiment 2

[0060] The herbal tea dregs (cellulose 36.5%, hemicellulose 18.5%, lignin 24.2%) were pulverized and passed through a 40-mesh sieve, and 5g of the dregs and the pretreatment solution were weighed and added to the reactor, and the solid-to-liquid ratio was 1:20 (g : mL), the ionic liquid [Bmim]Cl: water: p-toluenesulfonic acid = mass ratio 70%: 28.5%: 1.5% in the pretreatment solution, and treated at 130° C. for 2 h to obtain a treatment solution.

[0061] After the treatment solution was cooled to room temperature, under stirring with a glass rod, add 1.25 times the volume of the treatment solution with 90% (v / v) ethanol solution, let it stand for half an hour, and centrifuge (4000rpm, 4min), and the obtained solution was named solution A , the obtained solid A is the enriched product of heald fibers. Then, the solid A was washed twice with an ethanol solution of 0.8 times the volume of the treatment solution, and dried at 55° C. for use. The washing solution and solution A w...

Embodiment 3

[0066] The bagasse (cellulose 36.6%, hemicellulose 23.5%, lignin 22.7%) was pulverized and passed through a 20-mesh sieve, and 5 g was weighed into the reactor, and the solid-liquid ratio was 1:15 (g:mL). The ionic liquid in the solution [Bmim]Cl: water: p-toluenesulfonic acid = mass ratio of 70%: 29%: 1%, and treated at 110° C. for 2 hours to obtain a treatment solution.

[0067] After the treatment liquid was cooled to room temperature, under stirring with a glass rod, add 1.5 times the volume of the treatment liquid with 95% (v / v) ethanol solution, let stand for half an hour, and centrifuge (3500rpm, 5min), and the obtained liquid was named solution A , the obtained solid A is the enriched product of heald fibers. Then, the solid A was washed twice with an ethanol solution of 1 times the volume of the treatment solution, and dried at 55°C for use; the washing solution and solution A were combined to obtain a liquid phase, and the ethanol in the liquid phase was recovered by...

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Abstract

The invention discloses a pretreatment method for classification and utilization of traditional Chinese medicine dregs and its application. The method uses traditional Chinese medicine dregs as raw materials, and uses a trace amount of organic acid to catalyze the ionic liquid pretreatment system to promote the destruction and dissolution of the dense structure of the cell wall of the medicinal dregs. Lignin powder; cellulose enrichment can be further converted into monosaccharide and fuel ethanol; reagent ethanol and ionic liquid used in the process are recycled through distillation recovery. Through the synergistic effect of trace organic acids and ionic liquids, the invention significantly reduces the pretreatment time and energy consumption, and at the same time improves the performance and yield of the products; and regenerates the enriched products of comprehensive fibers and lignin products in steps, which significantly improves the overall quality of traditional Chinese medicine residues. Utilization rate; the final pretreatment reagents can all be recycled, which is green and environmentally friendly, and the process has good ecological and economic benefits.

Description

technical field [0001] The invention relates to the field of value-added utilization of waste biomass, in particular to a pretreatment method for grading utilization of traditional Chinese medicine residues and its application. Background technique [0002] The shortage of global fossil energy supply and the continuous deterioration of the ecological environment have triggered an upsurge in the development of renewable and clean energy. In recent years, lignocellulosic biomass has been widely studied because of its wide source and easy exploitation, which can be used as a raw material for the production of biofuel ethanol and other bulk chemicals, effectively alleviating the shortage of petroleum fuel and ecological pollution. [0003] As the birthplace of traditional Chinese medicine, my country has a planting area of ​​more than 2.4 million hectares of traditional Chinese medicinal materials, and the annual processing and production of medicinal slag waste is as high as 35...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/14C08H7/00C08B37/14D21C3/00
CPCC12P19/14C08H6/00C08B37/006C08B37/0003D21C3/003C12P2201/00
Inventor 朱明军魏浩林
Owner SOUTH CHINA UNIV OF TECH
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