Catalyst for selectively reducing release quantity of hydrogen cyanide in mainstream smoke of cigarettes based on cobalt oxide and preparation method of catalyst

A cigarette mainstream smoke and catalyst technology, applied in tobacco, smoke oil filter elements, food science, etc., can solve the problems that have a great impact and limit the application of activated carbon materials, and achieve the effects of reduced content, simple production process, and good application prospects

Inactive Publication Date: 2014-04-16
CHINA TOBACCO ZHEJIANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although activated carbon materials can effectively reduce the release of hydrogen cyanide in mainstream smoke of cigarettes, activated carbon also has strong adsorption to most of the gas phase compounds in mainstream smoke, making activated carbon materials have a great influence on cigarette smoking, which greatly Limit the application of activated carbon materials

Method used

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  • Catalyst for selectively reducing release quantity of hydrogen cyanide in mainstream smoke of cigarettes based on cobalt oxide and preparation method of catalyst
  • Catalyst for selectively reducing release quantity of hydrogen cyanide in mainstream smoke of cigarettes based on cobalt oxide and preparation method of catalyst
  • Catalyst for selectively reducing release quantity of hydrogen cyanide in mainstream smoke of cigarettes based on cobalt oxide and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dry 10 grams of 40-80 mesh alumina carrier at 100 degrees Celsius for 6 hours, and mix with 25 milliliters of 5mol / L NH 4 The F aqueous solution was mixed, then dried at 100°C for 6 hours, and calcined at 500°C for 4 hours to obtain a pretreated alumina carrier, which was ready for use. Then, using an equal volume impregnation method, 0.156 grams of cobalt chloride hexahydrate was formulated into a corresponding aqueous solution, and 1 gram of pretreated alumina carrier was added to the solution, and dried at 50 degrees Celsius for 12 hours to obtain a catalyst precursor . Finally, the catalyst precursor was calcined at 600 degrees Celsius for 6 hours under the protection of air atmosphere to obtain the catalyst.

[0025] A filter column (15 mm in length) with 50 mg of catalyst added to the filter near the cut tobacco section was made into a composite filter and made into a cigarette. The sample processing and smoking environment are in accordance with the national st...

Embodiment 2

[0029] Dry 10 grams of 40-80 mesh alumina carrier at 100 degrees Celsius for 24 hours, and mix with 25 milliliters of 5mol / L NH 4 The F aqueous solution was mixed, then dried at 100°C for 6 hours, and calcined at 500°C for 4 hours to obtain a pretreated alumina carrier, which was ready for use. Then, using an equal volume impregnation method, 0.03 g of cobalt chloride hexahydrate was formulated into a corresponding aqueous solution, and 1 g of pretreated alumina carrier was added to the solution, and dried at 100 degrees Celsius for 12 hours to obtain a catalyst precursor . Finally, the catalyst precursor was calcined at 600 degrees Celsius for 4 hours under the protection of air atmosphere to obtain the catalyst.

[0030] The hydrogen cyanide removal rate test method of catalyst is identical with embodiment 1, and this catalyst sees the following table 2 to the effect of selectively reducing hydrogen cyanide in cigarette mainstream smoke:

[0031] Table 2 Harm reduction e...

Embodiment 3

[0034] Dry 10 grams of 40-80 mesh alumina carrier at 100 degrees Celsius for 24 hours, and mix with 25 milliliters of 5mol / L NH 4 The F aqueous solution was mixed, then dried at 100°C for 6 hours, and calcined at 500°C for 4 hours to obtain a pretreated alumina carrier, which was ready for use. Then, using an equal volume impregnation method, 0.003 grams of cobalt chloride hexahydrate was formulated into a corresponding aqueous solution, and 1 gram of pretreated alumina carrier was added to the solution, and dried at 100 degrees Celsius for 12 hours to obtain a catalyst precursor . Finally, the catalyst precursor was calcined at 600 degrees Celsius for 4 hours under the protection of air atmosphere to obtain the catalyst.

[0035] The hydrogen cyanide removal rate test method of catalyst is identical with embodiment 1, and this catalyst sees the following table 3 to the effect of selectively reducing hydrogen cyanide in cigarette mainstream smoke:

[0036] Table 3 Harm red...

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Abstract

The invention relates to the field of cigarette making and in particular relates to a catalyst for selectively reducing the release quantity of hydrogen cyanide in mainstream smoke of cigarettes and a preparation method of the catalyst. The catalyst comprises the following components by weight percent: 0.1%-5% of cobalt oxide and 95%-99.9% of an aluminum oxide carrier. According to the technical scheme, active metal is gathered on the surface of the carrier by adopting a preparation method of an eggshell type catalyst, and then the active metal content is reduced, so that the influence on the cigarette taste due to the addition of the catalyst in a filter tip is reduced; the catalyst is simple in production process and has a certain particle size; the provided catalyst is suitably applied to the cigarettes; the produced composite filter tip is capable of selectively reducing the release quantity of the hydrogen cyanide in the mainstream smoke of the cigarettes by about 60% to the maximum extent; the application prospect is very good.

Description

technical field [0001] The invention relates to the field of cigarette manufacturing, in particular to a catalyst for selectively reducing hydrogen cyanide release in cigarette mainstream smoke and a preparation method thereof. Background technique [0002] Hydrogen cyanide (HCN) in mainstream cigarette smoke mainly comes from the transformation of protein, amino acid and nitrate in tobacco, especially the pyrolysis of glycine, proline and aminodicarboxylic acid. Hydrogen cyanide (HCN) is a highly toxic substance, cyano (CN — ) in the human body is easy to interact with Fe in the oxidative cytochrome oxidase in the mitochondria of cells 3+ binding, thereby preventing the Fe 3+ The reduction of cytochrome oxidase inhibits cytochrome oxidase, so that cells and tissues cannot use oxygen, resulting in intracellular suffocating hypoxia. Hoffmann included it in the list of harmful constituents of mainstream cigarette smoke. Therefore, reducing hydrogen cyanide in cigarette mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/83A24D3/16
Inventor 周国俊沈凯郭杨龙储国海夏俊夏倩徐建肖卫强刘金莉戴路胡安福詹望成俎健
Owner CHINA TOBACCO ZHEJIANG IND
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