Method for recycling acetate fibers from cigarette butt filter tip

A technology of cellulose acetate and filter tips, which is applied in the direction of separation methods, chemical instruments and methods, and crystallization separation, can solve the problems of non-quantitative, restricted application range, and high cost of ionic liquids, and achieves mild and controllable operating conditions, low cost, and high technology. simple effect

Active Publication Date: 2017-07-07
浙大宁波理工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this, Zhou Yawen et al. used chloro-1-allyl-3-methylimidazole ([AMIM]Cl) to dissolve cellulose acetate in recycled cigarette butts, and the dissolution time was shorter than the above-mentioned several traditional methods, which required 70 minutes , the suitable dissolution temperature is 137°C, but the cost of ionic liquid is relatively high, about 500 yuan / 100g, and the toxicity has yet to be evaluated. If it is to be used to recover a large number of cellulose acetate in cigarette butts, further research is needed
Chinese patent CN201210183378.0 uses simple physical methods such as cutting to process the cigarette butts and then use them for papermaking. It is difficult to ensure the purity of acetate fiber, thus restricting its application range
In "Preliminary Discussion on the Recycling and Reuse of Discarded Cigarette Butts", Jing Jing et al. briefly mentioned that the mixture of acetic acid and acetic anhydride was used as a solvent to extract cellulose acetate from cigarette butts under the catalysis of sulfuric acid, but there was no quantitative analysis.

Method used

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  • Method for recycling acetate fibers from cigarette butt filter tip
  • Method for recycling acetate fibers from cigarette butt filter tip
  • Method for recycling acetate fibers from cigarette butt filter tip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] React the pretreated cigarette butt with 50mL of glacial acetic acid at 95°C for 4h, wash the product with deionized water, let the liquid stand at room temperature for 2h, the solid precipitates, and wash repeatedly until the conductivity of the washing liquid is equal to that of deionized water. Conductivity, the solid was dried at 80°C for 3 hours to obtain cellulose acetate.

Embodiment 2

[0046] React the pretreated cigarette butt with 50mL glacial acetic acid at 95°C for 0.25h, wash the product with deionized water, let the liquid stand at room temperature for 2h, and the solid precipitates out, wash repeatedly until the conductivity of the washing liquid is deionized water Conductivity, the solid was dried at 80°C for 3 hours to obtain cellulose acetate.

Embodiment 3

[0048] React the pretreated cigarette butt with 30mL of glacial acetic acid at 95°C for 4 hours, wash the product with deionized water, let the liquid stand at room temperature for 2 hours, the solid precipitates out, and wash repeatedly until the conductivity of the washing liquid is equal to that of deionized water. Conductivity, the solid was dried at 80°C for 3 hours to obtain cellulose acetate.

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Abstract

The invention relates to a method for recycling acetate fibers from a cigarette butt filter tip by utilizing acetic acid as a solvent. The method is characterized in that only the acetic acid is taken as the solvent, and the acetate fibers are efficiently recycled from a cigarette butt. The acetate fibers are recycled by controlling reaction conditions such as solvent concentration, solvent volume, dissolution time and dissolution temperature. Operation is simple, cost is low, equipment is simple, and technology is stable.

Description

technical field [0001] The invention belongs to the technical field, and relates to a method for recovering cellulose acetate from cigarette butt filters, in particular to a method for treating cigarette butts that are waste resources and beneficial to environmental protection. [0002] technical background [0003] With the continuous advancement of science and technology and the continuous improvement of living standards, the problem of environmental pollution has gradually become one of the most severe challenges facing us today. Nowadays, among the numerous populations in our country, 60% of men and 4% of women are smokers, and discarded cigarette butts (i.e. cigarette butt filters) have become one of the most common solid wastes in our lives. Most of these cigarette butt filters are made of cellulose acetate, which is difficult to degrade in nature. When the toxicity of cigarette butts exists for a long time, the food chain will be polluted, and the harm to people can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/08C08L1/12
CPCC08J11/08C08J2301/12B01D9/0054B01D11/0288
Inventor 张艳辉王志锋尚龙安陈静
Owner 浙大宁波理工学院
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