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Wet-combined filter stick for selectively reducing NNK in cigarette mainstream flue gas, as well as preparation method and application thereof

A cigarette mainstream smoke and composite filter rod technology, applied in the field of cigarette manufacturing, can solve the problems of lack of effective methods and means, selectivity reduction, etc.

Inactive Publication Date: 2014-07-30
CHINA TOBACCO ZHEJIANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, there is no effective method and means to reduce the selectivity of NNK, which is one of the important problems faced by the tobacco industry

Method used

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  • Wet-combined filter stick for selectively reducing NNK in cigarette mainstream flue gas, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A composite filter rod for selectively reducing NNK in mainstream smoke of cigarettes. The composite filter rod is composed of silica gel particles by applying diacetate fiber tow to silica gel particles. The particle size range of the silica gel particles is 500-600 microns. The BET average pore size is 100 angstroms and the specific surface area is 600m 2 / g, the pore volume is 0.60ml / g, and the mass ratio of silica gel particles and cellulose diacetate tow is 1:4.

[0023] A method for preparing said composite filter rod, the method comprises the following steps:

[0024] 1) Add water to silica gel particles to make silica gel slurry, and the solid content of the silica gel slurry is 40% of the total mass;

[0025] 2) impregnating cellulose diacetate tow with silica gel slurry, and drying to obtain cellulose diacetate tow containing silica gel particles;

[0026] 3) Making the diacetate cellulose tow obtained above into a filter rod.

[0027] The above-mentioned c...

Embodiment 2

[0029] A composite filter rod for selectively reducing NNK in mainstream cigarette smoke. The composite filter rod is composed of silica gel particles composited with diacetate fiber tow. The particle diameter of the silica gel particles is 700-800 microns, and the BET of the silica gel particles is The average pore diameter is 80 angstroms and the specific surface area is 500m 2 / g, the pore volume is 0.75ml / g, and the mass ratio of silica gel particles and cellulose diacetate tow is 1:3.

[0030] A method for preparing said composite filter rod, the method comprises the following steps:

[0031] 1) Add water to silica gel particles to make silica gel slurry, and the solid content of the silica gel slurry is 40% of the total mass;

[0032] 2) impregnating cellulose diacetate tow with silica gel slurry, and drying to obtain cellulose diacetate tow containing silica gel particles;

[0033] 3) Making the diacetate cellulose tow obtained above into a filter rod.

[0034] The a...

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Abstract

The invention relates to a combined filter stick for selectively reducing the NNK in cigarette mainstream flue gas. The combined filter stick is formed in the way that diacetate fiber tows are combined with silica gel particles, wherein the particle diameter of the silica gel particles ranges from 100 microns to 700 mircons; the BET average pore diameter of the silica gel particles is 50-300 angstroms; the specific surface area of the silica gel particles is 150-900 m<2> / g; the pore volume of the silica gel particles is 0.45-0.8 ml / g; the ratio of the mass of the silica gel particles to the diacetate fiber tows ranges from 1:5 to 1:1. According to the invention, through adopting the technical scheme, the combined filter stick has the same tar-reducing efficiency, can selectively reduce polar molecules such as carbonyl compounds, nitrile, pyridine and NNK, and avoids filtering nonpolar molecules such as aromatics and alkene; moreover, the reducing rate of the NNK in the cigarette main stream flue gas can reach 30 to 45 percent.

Description

technical field [0001] The invention relates to the field of cigarette manufacture, in particular to a composite filter rod for selectively reducing NNK in cigarette mainstream smoke, a preparation method and application thereof. Background technique [0002] As consumers pay more and more attention to smoking and health issues, the tobacco industry has made some progress in tar reduction and harm reduction. The tar content of cigarettes has dropped from 17mg in 2002 to the current 11mg. By 2015, the State Tobacco Monopoly Administration requires that cigarettes The amount of tar on the box label shall not exceed 10mg, and the hazard index shall not exceed 9, which poses new challenges to the tobacco industry. [0003] While reducing tar and harm, the national bureau also requires the selective reduction of seven substances in the cigarette hazard index, including CO, HCN, NNK, NH3, BaP, phenol, and crotonaldehyde. NNK (4-methylnitrosamine-(3-pyridyl)-1-butanone) is one of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24D3/14A24D3/10
Inventor 储国海徐清泉王辉李海锋
Owner CHINA TOBACCO ZHEJIANG IND
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