Recycle method of acetate fiber in waste acetate fiber tow filter rod leftovers

A technology of fiber tow and acetate fiber, which is applied in the field of separation of acetate fiber and paper, can solve the problems of environmental pollution and waste of resources, and achieve the effects of wide application, low production cost and short process

Inactive Publication Date: 2010-06-02
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, waste cellulose acetate tow nozzle rod scraps are treated by incineration and landfill, which wastes resources and pollutes the environment
How to deal with waste tobacco tow, prevent waste tobacco acetate tow from flowing into the society for counterfeit cigarette production, and at the same time reduce environmental pollution and enable waste to be reused has always been a problem that tobacco manufacturers have not been able to obtain. well solved problem

Method used

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  • Recycle method of acetate fiber in waste acetate fiber tow filter rod leftovers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 4.8g of waste cellulose acetate tow nozzle stick, add it to 30mL ethanol with a volume percentage concentration greater than 95%, soak for 1 hour, centrifuge, vacuum dry and recover 24mL of ethanol, and the recovery rate of ethanol is 80.0%. Then the dried waste cellulose acetate tow nozzle rod is added to 40mL industrial grade or acetone with a concentration of 99% by volume. After the melting is completed, the paper sheet is filtered off, and the filtrate is evaporated to make the solvent content less than 1% of the total weight. Acetone was 35 mL, and the recovery rate was 87.5%, and 3.53 g (calculated as CA) of solid diacetate cellulose was obtained, and the recovery rate was 93.0%.

Embodiment 2

[0030] Weigh 20.0 g of waste cellulose acetate tow tip, add it to 200 mL of ethanol with a concentration greater than 95% by volume, soak for 1 hour, centrifuge and vacuum dry to recover 185 mL of ethanol, and the recovery rate of ethanol is 92.5%. Then the dry waste cellulose acetate tow nozzle rod is added to 180mL industrial grade or acetone with a volume percentage concentration of 99%. After the melting is completed, the paper sheet is filtered off, and the filtrate is evaporated to dryness so that the solvent content is less than 1% of the total weight. 170 mL of acetone, the recovery rate was 94.4%, and 15.1 g (calculated as CA) of solid diacetate fiber was obtained, and the recovery rate was 95.8%.

Embodiment 3

[0032] Weigh 1000.0 g of waste cellulose acetate tow tip, add it to 6500 mL of ethanol with a concentration greater than 95% by volume, soak for 1 hour, and recover 5800 mL of ethanol by centrifugation, with an ethanol recovery rate of 92.5%. Then the dry waste cellulose acetate tow nozzle rod is added to 10000mL industrial grade or acetone with a volume percentage concentration of 99%. After the melting is completed, the paper sheet is filtered off, and the filtrate is evaporated to dryness so that the solvent content is less than 1% of the total weight. Acetone 9560mL, the recovery rate was 95.6%, and 775.0 g (calculated as CA) of solid diacetate fiber was obtained, and the recovery rate was 98.1%.

[0033] According to the above basic operation steps, the results of reclaiming diacetate fiber under different conditions are shown in Table 1.

[0034] Table 1 Recovers a list of diacetate fibers under different conditions

[0035]

[0036] Listed in Table 1 above:

[0037...

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Abstract

The invention discloses a recycle method of acetate fiber in waste acetate fiber tow filter rod leftovers. The method is characterized by comprising the following steps: firstly, soaking the waste acetate fiber tow filter rod leftovers in an ester-removing solvent; removing and recycling the ester-removing solvent in a filtration or centrifugalization mode to obtain a material to be processed; then, adding acetone, N, N-dimethylformamide DMF, acetic acid, acetonitrile, or dimethyl sulfoxide DMSO as melting solvents to the material to be processed to obtain an emulsion; removing undissolved paper and rubber impurities in the emulsion in the filtration or centrifugalization mode; and steaming and recycling the solvent at normal pressure or reduced pressure to solid high-purity cellulose diacetate. The invention has simple and practical production process, environmental protection, no emission, short flows, low cost, high yield and good product quality.

Description

technical field [0001] The invention relates to a method for separating acetate fiber from paper in the leftovers of waste acetate tow nozzles and sticks Background technique [0002] In the production process of 1-3 types of cigarettes, there will be a large amount of waste acetate tow leftovers. Some cigarette manufacturers adopt the disposal method of burning and burying, but this method will bring serious environmental pollution. [0003] The molecular formula of cellulose acetate is [C 6 h 7 o 2 (OCOCH 3 )x(OH) 3-x ] n , n=200~400, when x=2.28~2.49, be diacetate cellulose when being equivalent to acetic acid content 53%~56%, be called for short diacetate sheet, the acetyl group content of diacetate sheet is 38%~40%. Second vinegar sheet has many excellent properties such as weather resistance, impact resistance, oil resistance, no static electricity, and good secondary processability. Diacetate fiber tow is widely used in the tobacco industry because it has the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/08C08L1/12A24C5/36
CPCY02W30/62
Inventor 李有桂江娅李雨啸王辉薄飞
Owner HEFEI UNIV OF TECH
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