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Method for extracting cellulose from tobacco waste based on water-alcohol oxidation process

A technology of tobacco waste and oxidation method, applied in the chemical industry, can solve the problems that hinder the wide application of tobacco cellulose, high cost, low efficiency, etc., and achieve the effect of huge industrial production potential, low cost, and expanded utilization range

Active Publication Date: 2012-10-17
CHONGQING HENGYUAN JINTONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current pretreatment methods and solvents for dissolving cellulose seriously hinder the wide application of tobacco cellulose due to high cost, high pollution and low efficiency.

Method used

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  • Method for extracting cellulose from tobacco waste based on water-alcohol oxidation process
  • Method for extracting cellulose from tobacco waste based on water-alcohol oxidation process
  • Method for extracting cellulose from tobacco waste based on water-alcohol oxidation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 100g of dried tobacco waste is pulverized into a particle size of 20 mesh, put into boiling water for 20 minutes, and vacuum filtered to remove moisture to obtain a pretreatment material; 15 times the volume of ethanol solution, the ethanol solution has a volume percentage of 70%, reacted at 100°C for at least 120 minutes, and vacuum filtered to remove water to obtain a filter residue, which was moved into an oven and dried at 105°C until After the mass is constant, it is 19.7g, and the cellulose content in the filter residue is 50.7%.

Embodiment 2

[0031] The SEM image of tobacco waste without any treatment is as follows figure 1 As shown, the surface of the tobacco material is smooth, neat and tightly connected.

[0032] 100g of dried tobacco waste was pulverized into a particle size of 20 mesh, put into boiling water for 60 minutes, and vacuum filtered to remove moisture to obtain a pretreatment material; 15 times the volume of the ethanol solution, the volume percentage of the ethanol solution is 70%, reacted at 100 ° C for at least 120 minutes, and vacuum filtered to remove moisture to obtain a filter residue, which is crude cellulose, such as figure 2 Breakage of bonds, depressions, voids appear in the tobacco material shown.

[0033] Put hydrogen peroxide solution in the filter residue, the solid-to-liquid volume ratio of filter residue and hydrogen peroxide solution is 1:10, the reaction time is 60 minutes, the reaction temperature is 30° C., the concentration of hydrogen peroxide solution is 10%, and filter aft...

Embodiment 3

[0035] 100g of dried tobacco waste was pulverized into a particle size of 20 mesh, put into boiling water for 60 minutes, and vacuum filtered to remove moisture to obtain a pretreatment material; 20 times the volume of the ethanol solution, the volume percentage of the ethanol solution is 70%, reacted at 100°C for at least 120 minutes, and vacuum filtered to remove water to obtain a filter residue, which is crude cellulose.

[0036] Put into hydrogen peroxide solution in described filter residue, the solid-liquid volume ratio of filter residue and hydrogen peroxide solution 1: 5, reaction time 60 minutes, 30 ℃ of reaction temperatures, the volume percent concentration of hydrogen peroxide solution 8%, reaction Filtration is carried out after completion, and the obtained filter residue is moved into an oven, and dried at 105° C. until the mass is constant to 20.8 g, and the cellulose content of the filter residue is 63.0%.

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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 water-alcohol oxidation process, comprising the following steps: crushing the tobacco waste, putting the crushed waste in water to boil for no less than 20 min and dewatering to obtain a pretreatment material; adding an alcoholic solution having the volume of 5-70 times of the volume of the tobacco waste in the obtained pretreatment material, reacting for at least 30min at 80-100 DEG C, and carrying out solid-liquid separation to obtain filter residues, wherein the volume percentage of the alcoholic solution is 20-90 %, and the filter residues are crude cellulose. The method has the advantages of simple process, energy saving and environmental protection, and the purposes of removing residual lignin, extracting residual hemicellulose and soluble substance can be achieved by using reductant-oxidants to process the tobacco raw material. By using the water-alcohol oxidation process to process tobacco cellulose first and using the reductant-oxidant solution to oxidize and then extracting, the extraction efficiency is raised about by 150% compared with using the water-alcohol oxidation process along, thus the extraction efficiency is greatly raised.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a chemical extraction method of agricultural waste. Background technique [0002] Energy saving, emission reduction and comprehensive utilization of renewable resources are currently attracting worldwide attention. The planting area and output of tobacco plants in my country rank first in the world. As a major tobacco producer, in addition to producing 4.5 to 5 million tons of tobacco leaves in my country every year, nearly 25% of tobacco leaves, tobacco powder and other leftovers are discarded and cannot be used for cigarettes. Production. With the proposal of the "Twelfth Five-Year Plan", how to make better use of tobacco waste is the current focus of attention. As a natural polymer material, cellulose is widely used in medicine, papermaking and other industries. It can also be used to produce polylactic acid, methyl cellulose, ethyl cellulose, microcrystalline cellulose, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/06
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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