Method for extracting cellulose from sugarcane bagasse

A technology of bagasse and cellulose, applied in the direction of fermentation, etc., can solve the problems of hindering large-scale industrial production, increasing the cost of processing lignocellulosic raw materials, and large demand for glycerin

Inactive Publication Date: 2015-11-04
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, when using glycerol as a cooking solvent to process lignocellulosic raw materials, the demand for glycerin is relatively large, and the liquid-solid ratio reaches 20, which greatly increases the cost of processing lignocellulosic raw materials, thereby seriously hindering its large-scale industrial production.

Method used

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  • Method for extracting cellulose from sugarcane bagasse
  • Method for extracting cellulose from sugarcane bagasse
  • Method for extracting cellulose from sugarcane bagasse

Examples

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Comparison scheme
Effect test

example 1

[0028] Example 1: Weigh 10g of bagasse that has passed through a 20-mesh sieve and dried in a 60°C oven to constant weight, and put it into a three-hole flask, add 200g, 70% glycerin aqueous solution, put it into a heating mantle, heat to 220°C, and keep it warm for 2 A temperature probe was placed in the left port of the three-hole flask to control the detection temperature, a mechanical stirring rod was placed in the middle to fully mix the reaction mixture, and a condenser tube was added to the right port to collect condensed water and prevent excessive temperature rise. After the cooking is completed, cool down, and when the temperature drops to about 120°C, slowly add 150g of boiling water, stir rapidly to fully dissolve for about 10min, and start to use G 3 The sand core funnel is suction-filtered, and the temperature is 100 ℃, 500g, 50% glycerin aqueous solution washing, suction-filtration twice, and the temperature is 100 ℃, 400g distilled water washing, suction-filtrat...

example 2

[0029] Example 2: Weigh 10g of bagasse that has passed through a 20-mesh sieve and dried in a 60°C oven to constant weight, and put it into a three-hole flask. Put a temperature probe in the left port of the three-hole flask to control the detection temperature, and put a mechanical stirring rod in the middle. Make the reaction mixture fully mixed, and add a condenser to the right port to collect condensed water and prevent the temperature from rising too high. Set the optimal cooking temperature and time at 220°C for 2 hours. For the 7th time, add 280g of reusable 50% glycerin for washing and suction filtrate to cook, and all the other conditional parameters are the same as example 1. The filter cake obtained is glycerin crude cellulose, and the cellulose component is measured by the NREL method of the American Energy Laboratory. : The cellulose retention rate is 94%, and the lignin retention rate has reached 45%. Take a dry weight of 0.5g wet filter cake and add 25mL, 0.05M,...

example 3

[0030] Example 3: Improve the existing cooking device, add a condenser tube during the cooking process, recover the water evaporated during the heating process and the water obtained by washing with 400g of water and suction filtration, and use it as water for precipitating lignin. According to calculations, about 80% can be recovered- 90% water is used to achieve the purpose of saving water.

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Abstract

The invention provides a method for extracting cellulose from sugarcane bagasse. The method for extracting the cellulose from the sugarcane bagasse is characterized in that the bagasse is used as a raw material, a cyclic glycerol applying / water pre-processing method is adopted, cooking temperature is 200 DEG C-240 DEG C, cooking time is 1-5 hours, and the bagasse can be cyclically cooked and processed for 7 times by applying the glycerol subjected to suction filtration and washing in the cooking process, and water subjected to evaporation, washing and suction filtration is recovered for lignin precipitation, and the purpose of extracting the cellulose from the sugarcane bagasse is achieved. The United States Energy Laboratory (NREL) method is adopted to determine components of the cellulose, the retention rate of the cellulose is 94%, the lignin removal rate is higher than 55%, enzymolysis efficiency is 48%, the reutilization objective of conducting cyclic glycerol applying / water pre-processing on sugarcane juice and bagasse to extract cellulose is achieved, a large amount of glycerol / water is also saved, and an active role is played on future large-scale production or even industrial production.

Description

technical field [0001] The invention relates to a method for extracting bagasse cellulose, which belongs to the field of crop straw biomass biochemical engineering. Background technique [0002] Although biorefining has become a research hotspot in recent years, the era of real biomass economy has not yet arrived, and the biorefining technology of bioenergy and bio-based products from lignocellulosic biomass still faces many bottlenecks, among which lignocellulosic biomass The problems of pretreatment and enzymatic hydrolysis of the vegetarian-sugar platform (pretreatment, enzymatic hydrolysis and sugar fermentation) are particularly prominent. When analyzing cellulosic ethanol from biorefinery, Wyman CE believes that the process cost of cellulosic ethanol accounts for 67% of the total cost, among which the cost of raw material pretreatment is the highest, followed by enzymatic hydrolysis and enzyme production process, and the efficiency of enzymatic hydrolysis is low . ...

Claims

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Application Information

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IPC IPC(8): C12P19/14C12P19/04
Inventor 孙付保张峰王亮张震宇
Owner JIANGNAN UNIV
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