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Extraction equipment and extraction method for extracting hemicellulose from straws

A technology for hemicellulose and extraction equipment, applied in chemical instruments and methods, mixers with rotary stirring devices, transportation and packaging, etc., can solve the problems of waste of resources, low purity of hemicellulose, low extraction efficiency, etc. Achieve the effect of improving extraction rate, rich source and high purity

Inactive Publication Date: 2021-01-22
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the methods for extracting hemicellulose from crop straws have low extraction efficiency, low purity of hemicellulose, and serious waste of resources.

Method used

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  • Extraction equipment and extraction method for extracting hemicellulose from straws
  • Extraction equipment and extraction method for extracting hemicellulose from straws
  • Extraction equipment and extraction method for extracting hemicellulose from straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Extraction method for extracting hemicellulose from straw using extraction equipment:

[0054] (1) 50kg of rice straw and 50kg of sugarcane straw are put into a pulverizer for crushing, and the crushed straw is transported to a pretreatment device by a conveyor belt and degreased with n-hexane, then stirred and plate-and-frame filtered to obtain a straw filtrate;

[0055] (2) Transport the stalk filtrate to the mixing reactor at 48°C for 15 hours, and add the mixed solution to the mixing reactor at the same time to react to obtain the reaction solution; the mixed solution is prepared by 2mol / L sodium hydroxide solution and butanol : The mass ratio of 1.1 is mixed to obtain;

[0056] (3) ultrasonically treat the reaction solution at 650W and 950°C for 15 minutes to obtain the ultrasonic treatment solution;

[0057] (4) After condensing and filtering the ultrasonic treatment solution, centrifuge at 5500r / min for 10min, take the supernatant and add absolute ethanol for al...

Embodiment 2

[0059] Extraction method for extracting hemicellulose from straw using extraction equipment:

[0060] (1) 100kg of wheat straw is put into a pulverizer for pulverization, and the pulverized straw is transported to a pretreatment device by a conveyor belt, degreased with n-hexane, then stirred and plate-and-frame filtered to obtain a straw filtrate;

[0061] (2) Transport the straw filtrate to the mixing reactor for 18 hours at 40°C, and add the mixed solution to the mixing reactor at the same time to react to obtain the reaction solution; the mixed solution is composed of 2mol / L sodium hydroxide solution and butanol by 1 : The mass ratio of 0.8 is mixed to obtain;

[0062] (3) ultrasonically treat the reaction solution at 800W and 100°C for 10 minutes to obtain the ultrasonic treatment solution;

[0063] (4) After condensing and filtering the ultrasonic treatment solution, centrifuge at 7000r / min for 5min, take the supernatant and add absolute ethanol for alcohol precipitatio...

Embodiment 3

[0065] Extraction method for extracting hemicellulose from straw using extraction equipment:

[0066] (1) 100 kg of cotton stalks are put into a pulverizer for crushing, and the crushed stalks are transported to a pretreatment device by a conveyor belt and degreased with n-hexane, then stirred and plate-and-frame filtered to obtain a straw filtrate;

[0067] (2) Transport the stalk filtrate to the mixing reactor at 50°C for 10 hours, and add the mixed solution to the mixing reactor at the same time to react to obtain the reaction solution; the mixed solution is composed of 1mol / L sodium hydroxide solution and butanol : The mass ratio of 1.2 is mixed to obtain;

[0068] (3) ultrasonically treat the reaction solution at 600W and 80°C for 20 minutes to obtain the ultrasonic treatment solution;

[0069] (4) After the ultrasonic treatment solution is subjected to condensation filtration, it is centrifuged at 5000r / min for 10 minutes, and the supernatant is added to absolute ethano...

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Abstract

The invention discloses extraction equipment for extracting hemicellulose from straws. The extraction equipment comprises a pulverizer, a pretreatment device, a mixing reactor, an ultrasonic reactionkettle, a condensation filter, a centrifugal device and a liquid storage tank, wherein the pulverizer is connected with the pretreatment device through a conveying belt, the pretreatment device, the mixing reactor, the ultrasonic reaction kettle, the condensation filter and the centrifugal device are sequentially connected through pipelines, the liquid storage tank is connected with the mixing reactor through a pipeline, the bottom end of the centrifugal device is connected with the mixing reactor through a pipeline, the pretreatment device is sequentially provided with a mixing device and a plate-and-frame filter press, and a mixed solution is stored in the liquid storage tank. According to the technical scheme, straw is adopted as a raw material, the advantage of rich straw resources inChina is fully and reasonably utilized, and cheap and rich-source raw materials are provided for hemicellulose extraction. Meanwhile, a feasible scheme is provided for reutilization of straw waste resources, and the equipment is an important technical support for ecological construction and development, and has excellent industrialization prospect.

Description

technical field [0001] The invention relates to the technical field of crop waste treatment, in particular to an extraction device and an extraction method for extracting hemicellulose from straw. Background technique [0002] With the increasingly serious problems of environmental pollution and energy shortage, the utilization of crop straws has been widely concerned by scientific researchers. At present, crop straws are generally only used as fuels. However, the burning of straws not only wastes effective resources, but also At the same time, it will pollute the environment. [0003] Crop straw is rich in hemicellulose, straw contains 36.5%-38.6% of cellulose, 38.0%-38.8% of hemicellulose, and 12.3%-17.6% of lignin. [0004] Hemicellulose is a heterogeneous polymer composed of several different types of monosaccharides, five- and six-carbon sugars, including xylose, arabinose, and galactose. Hemicellulose xylan, which accounts for 50% of the total in woody tissues, is bo...

Claims

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Application Information

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IPC IPC(8): C08B37/14B01F7/18
CPCC08B37/006C08B37/0003B01F27/90
Inventor 雷映霞周青平
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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