Carboxylated carbon-based adsorbent for cigarette filter as well as preparation method and application of carboxylated carbon-based adsorbent

A cigarette filter tip, carboxylated carbon technology, which is applied in the application, smoke oil filter, tobacco and other directions, can solve the problems of high cost, does not meet energy saving and emission reduction, and achieves low cost, diversified utilization, and simple preparation process. Effect

Pending Publication Date: 2021-08-24
CHINA TOBACCO YUNNAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the adsorbents currently used are modified carbon nanotubes and modified graphene. Although they have the advantage of large specific surface area, the raw materials of carbon nanotubes or graphene need to be purchased, and the cost is high, which does not meet the requirements of energy saving and emission reduction. policy requirements

Method used

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  • Carboxylated carbon-based adsorbent for cigarette filter as well as preparation method and application of carboxylated carbon-based adsorbent
  • Carboxylated carbon-based adsorbent for cigarette filter as well as preparation method and application of carboxylated carbon-based adsorbent
  • Carboxylated carbon-based adsorbent for cigarette filter as well as preparation method and application of carboxylated carbon-based adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment 1 provides a method for preparing a carboxylated carbon-based adsorbent for cigarette filters, which specifically includes the following steps:

[0022] (1) After crushing the tobacco stems, place them in a tubular muffle furnace, and carbonize them at 230° C. for 30 minutes under a helium atmosphere to obtain a carbonized product.

[0023] (2) According to the ratio of 5g carbonized product / L hydrobromic acid aqueous solution, the carbonized product of step (1) is thrown in the mass concentration and is 70% in the hydrobromic acid aqueous solution, after ultrasonic dispersion 30min at 35 ℃, add 10% volume oxalic acid aqueous solution with a mass concentration of 10% and continue to sonicate for 300 min, and then filter, wash and dry to obtain a carboxylated carbon-based adsorbent.

[0024] The carboxylated carbon-based adsorbent prepared in Example 1 is used as a cigarette filter additive to remove harmful components in mainstream cigarette smoke. The ...

Embodiment 2

[0029] This embodiment 2 provides a method for preparing a carboxylated carbon-based adsorbent for cigarette filters, which specifically includes the following steps:

[0030] (1) After crushing the tobacco stalk, place it in a tubular muffle furnace, and carbonize it at 150° C. for 120 minutes under a nitrogen atmosphere to obtain a carbonized product.

[0031] (2) According to the ratio of 5g / L, the carbonized product is thrown into a mass concentration of 50% hydrobromic acid aqueous solution, and ultrasonically dispersed for 120min at 25°C. After that, adding 10% volume of oxalic acid aqueous solution with a mass concentration of 7.5% and Continue to sonicate for 240 min, and then filter, wash, and dry to obtain a carboxylated carbon-based adsorbent.

[0032] The carboxylated carbon-based adsorbent prepared in Example 2 is used as a cigarette filter additive to remove harmful components in cigarette mainstream smoke. The test procedure refers to Example 1, and the results ...

Embodiment 3

[0037] This embodiment 3 provides a method for preparing a carboxylated carbon-based adsorbent for cigarette filters, which specifically includes the following steps:

[0038] (1) After crushing the tobacco stalk, place it in a tubular muffle furnace, and carbonize it at 170° C. for 150 minutes in a helium atmosphere to obtain a carbonized product.

[0039] (2) According to the ratio of 5g / L, the carbonized product is thrown into a mass concentration of 30% hydrobromic acid aqueous solution, and ultrasonically dispersed for 60min at 55°C. Continue to sonicate for 60 minutes, and then filter, wash, and dry to obtain a carboxylated carbon-based adsorbent.

[0040] The carboxylated carbon-based adsorbent prepared in Example 3 is used as a cigarette filter additive to remove harmful components in cigarette mainstream smoke. The test procedure refers to Example 1, and the results are shown in Table 3 below:

[0041] table 3

[0042]

[0043] Table 3 shows that the carboxylated...

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Abstract

The invention belongs to the field of adsorbents, and particularly relates to a carboxylated carbon-based adsorbent for a cigarette filter as well as a preparation method and application of the carboxylated carbon-based adsorbent. A carbon-based material in the carboxylated carbon-based adsorbent is a carbonized product of a plant carbon source. Waste tobacco stems in the tobacco generation process and a carbonized product obtained by directly carbonizing the tobacco stems are creatively used as an adsorbent substrate, then carboxylation is performed, and the carboxylated carbon-based adsorbent is obtained. The carbonized product has the advantage of large specific surface area of a carbon material and has a high adsorption effect as an adsorbent. According to the carboxylated carbon-based adsorbent, the acidic effect of carboxyl is utilized, the carboxylated carbon-based adsorbent and alkaline matter ammonia and NNK in flue gas generate an adsorption effect, the selectivity reduction rate of ammonia gas in the flue gas can reach 18%-30%, and the selectivity reduction rate of NNK (4-methyl nitrosamine-1-3-pyridyl-1-butanone) in the flue gas can reach 17%-31%. In addition, it is accidentally found that the selectivity reduction rate of the carboxylated carbon-based adsorbent to crotonaldehyde in gas can reach 16-25%.

Description

technical field [0001] The invention belongs to the field of adsorbents, in particular to a carboxylated carbon-based adsorbent used for cigarette filters and its preparation method and application. Background technique [0002] With the development of society, smokers have continuously increased requirements for the safety of cigarette products. Therefore, reducing the content of harmful components in cigarette smoke to reduce the harm of cigarettes to human body is the focus of common concern of the tobacco industry and cigarette enterprises. It is an effective harm reduction method to adsorb harmful components in smoke through adsorbents in cigarette filters, but how to achieve selective adsorption of different harmful components is the difficulty in the selection of adsorbents. [0003] Carbon-based materials have the advantages of wide sources, low preparation cost, and safety advantages, and can achieve selective adsorption of different adsorbates through modification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24D3/16A24D3/14
CPCA24D3/163A24D3/14
Inventor 杨晨何沛向能军刘春波刘志华蒋薇司晓喜唐石云张凤梅蒋昆明李振杰苏钟璧
Owner CHINA TOBACCO YUNNAN IND
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