Method for extracting cellulose from tobacco waste based on reductant-oxidant

A technology of tobacco waste and cellulose, which is applied in fiber raw material processing, textile and papermaking, etc., can solve the problems of non-compliance with energy saving and emission reduction, corroded equipment, and high energy consumption, and achieves huge industrial production potential, low environmental pollution, and energy efficiency. low consumption effect

Active Publication Date: 2015-04-01
CHONGQING HENGYUAN JINTONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional acid-base treatment method has high energy consumption, heavy pollution, corrosion of equipment, and does not meet the requirements of energy saving and emission reduction.

Method used

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  • Method for extracting cellulose from tobacco waste based on reductant-oxidant
  • Method for extracting cellulose from tobacco waste based on reductant-oxidant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 100g of tobacco waste with a particle size of 20 meshes, boil it in water for 1 hour, then separate the solid from the liquid, take the solid, add 60% ethanol with a volume percentage equivalent to 20 times the volume of the solid, and heat it at 100°C Stirring for 2 hours, the reaction solution was filtered, and the obtained filter residue was moved into an oven, and dried at 105° C. until the mass was constant to 39.1 g, and the cellulose content in the filter residue was 34%.

Embodiment 2

[0026] Accurately weigh 170 g of NaOH and dissolve it in 510 mL of distilled water to prepare a NaOH solution with a concentration of 25% by mass. Weigh 100g of tobacco waste with a particle size of 20 mesh and put it into a three-necked bottle, then add 500mL of NaOH solution with a mass percentage concentration of 25%, and react with mechanical stirring for 1 hour. After the reaction, wash and filter with distilled water until the filtrate Until it is neutral, the obtained filter residue is moved into an oven and dried at 105° C. to a constant mass of 49.1 g after drying. The cellulose content in the filter residue only accounts for 65% of the total mass of cellulose.

Embodiment 3

[0028] Weigh 100g of tobacco waste with a particle size of 20 mesh and put it into a three-neck bottle, then add 500mL of hydrochloric acid solution with a mass concentration of 10%, and react with mechanical stirring for 1.5 hours. The resulting filter residue was moved into an oven and dried at 105°C to a constant mass of 48.7g after drying. The cellulose content in the filter residue only accounted for 67% of the total mass of cellulose.

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Abstract

The invention relates to a chemical extraction method of agricultural waste, particularly a method for extracting cellulose from tobacco waste based on a reductant-oxidant, comprising the following steps: crushing the dried tobacco waste, putting the crushed waste in water to immerse for no less than 6 h to obtain a pretreatment liquid; carrying out solid-liquid separation on the pretreatment liquid and taking the solids, adding a reductant-oxidant solution having the volume of 3-150 times of the volume of the tobacco waste and having the volume percentage of no less than 3%, reacting for at least 15min at 20-90 DEG C to obtain a reaction solution, carrying out solid-liquid separation on the reaction solution, and taking the filter residues, wherein the filter residues are cellulose. The method has the advantages of simple process, energy saving and environmental protection. Compared with the methods for processing tobacco cellulose by traditional acid, alkali activation treatment and other physicochemical treatment, the production cost can be greatly reduced.

Description

technical field [0001] The invention relates to the field of chemical extraction, in particular to a chemical extraction method of agricultural waste. Background technique [0002] my country's tobacco planting area ranks first in the world, and tobacco planting and product processing play an important role in the national economy. The tobacco planting industry currently mainly utilizes high-quality tobacco leaves for making cigarette products. In the process of tobacco planting and purchasing, tobacco leaves, which account for about 13% of the total national tobacco output, are disposed of as waste every year, which has become a difficult problem affecting the development of the tobacco industry. Cellulose is the most precious natural renewable resource for human beings. It is widely used in industries such as textiles, medicine, ethanol and lactic acid by fermentation, and has high social value. The use of agricultural waste to extract cellulose has become a research hot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00
Inventor 王远亮陈奎曾国明郑羽西张健荣魏小娅
Owner CHONGQING HENGYUAN JINTONG TECH
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