Method for dipping and modifying activated carbon, and application

A technology of activated carbon and modification, applied in the fields of application, chemical instruments and methods, food science, etc., can solve problems such as adverse effects of flue-cured cigarette smoking, so as to relieve dryness and irritation, enhance aroma, and improve smoking taste Effect

Inactive Publication Date: 2017-08-22
SHANGHAI TOBACCO GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, although some flue-cured tobacco products with activated carbon filters have appeared in China, consumers generally report that activated carbon filters have adverse effects on the

Method used

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  • Method for dipping and modifying activated carbon, and application
  • Method for dipping and modifying activated carbon, and application
  • Method for dipping and modifying activated carbon, and application

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] Take 50g of activated carbon (French pickup company, BCCplus model coconut shell activated carbon, respectively add 150mL of 0.1mol / L different acid aqueous solution, soak and modify for 24h, then dry at 120℃ for 24h to prepare modified activated carbon.

[0033] The specific surface area of ​​the modified activated carbon was tested, and the test results are shown in Table 1. The specific surface area of ​​activated carbon after treatment with 0.1 mol / L different acid aqueous solution was changed compared with the activated carbon without acid impregnation, but the change was not significant.

[0034] Table 1 Specific surface area of ​​activated carbon after treatment with 0.1mol / L different acid aqueous solutions

[0035]

Example Embodiment

[0036] Example 2

[0037] Take citric acid as an example to describe the implementation process.

[0038] Take 50g activated carbon (French pickup company, BCCplus model activated carbon) respectively add 150 mL of aqueous solution of citric acid with different mass concentrations, immerse and modify for 24h, then dry at 120°C for 24h to obtain modified activated carbon.

[0039] The specific surface and pore structure of the modified activated carbon were tested. The test results are shown in Table 2. The specific surface area and total pore volume of the modified activated carbon changed significantly with the change of the mass concentration of citric acid.

[0040] Table 2 Pore structure parameters of citric acid modified activated carbon with different mass concentrations

[0041]

[0042]

[0043] Cigarette smoking evaluation shows that activated carbon with 5% mass concentration of citric acid has the best effect after impregnation and modification.

[0044] Such as figure 1 with ...

Example Embodiment

[0047] Example 3

[0048] In order to investigate the actual harm reduction effect of the modified activated carbon, the modified activated carbon prepared by the 10wt% citric acid aqueous solution in Example 2 was impregnated and modified to be applied to filter cigarettes. The 7 harmful components of cigarette smoke were analyzed and the overall harm The performance index is evaluated and compared with unmodified activated carbon filter cigarettes. The results are shown in Table 3. It can be seen that although modified activated carbon has a smaller specific surface area than unmodified activated carbon, it can still achieve better reduction after impregnation modification. Harmful effect; when used in the same brand of cigarettes, compared with unmodified activated carbon, NH 3 , NNK, BaP, and phenol content all decreased, while the overall hazard index decreased.

[0049] Analysis methods of seven harmful components: CO analysis is in accordance with GB / T 23356-2009 standard; H...

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PUM

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Abstract

The invention provides a method for dipping and modifying activated carbon. The method comprises the steps: adding the activated carbon into an aqueous solution of acid, dipping and modifying, and drying to obtain the modified activated carbon. The method for dipping and modifying the activated carbon provides a simple and flexible activated carbon acid modification method by aiming at the defects of the existing technology of modifying the activated carbon for cigarettes, does not need pretreatment and does not need to perform treatment on the activated carbon by high-temperature pressure or heating refluxing methods; and the specific surface area and the micro-mesoporous volume of the modified activated carbon are remarkably changed. The modified activated carbon prepared by the method is applied to cigarette filters, and remarkably improves the smoking aroma quality, the aroma quantity, the smoke concentration and the smoke transmission property of the smoke as well as relieves dry sensation and stimulation sensation of the cigarette smoke as compared with the commercialized unmodified activated carbon so as to improve the smoking odor of the cigarettes integrally.

Description

technical field [0001] The invention relates to the technical field of application of modified activated carbon, and more specifically relates to an activated carbon impregnation modification method and its application. Background technique [0002] The first activated carbon filter cigarette was introduced by the American tobacco industry in the 1950s. After that, major tobacco companies carried out a lot of research work to apply activated carbon to cigarette filters. At present, the application of activated carbon composite filters in foreign hybrid cigarettes is relatively mature, and the main markets are Japan, South Korea, Hungary, Russia and Venezuela. Cigarettes with activated carbon filters account for a relatively large share in the cigarette markets of Japan, South Korea, Europe and some South American countries. Among the cigarette markets in Japan and South Korea, the market share of cigarettes using activated carbon composite filters is as high as 95% and 90%. ...

Claims

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Application Information

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IPC IPC(8): A24D3/16B01J20/20B01J20/32B01D53/02
CPCA24D3/163B01D53/02B01D2253/102B01D2258/0283B01J20/20B01J20/32
Inventor 李钢吴达刘百战蔡振波
Owner SHANGHAI TOBACCO GRP CO LTD
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