Catalyst for selectively reducing hydrogen cyanide release in cigarette mainstream smoke based on nickel oxide and preparation method thereof

A cigarette mainstream smoke and selectivity technology, applied in the field of cigarette manufacturing, can solve the problems of restricting the application of activated carbon materials and having a great impact, and achieve the effects of reduced content, simple production process, and good application prospects

Active Publication Date: 2016-05-04
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 hydrogen cyanide release in cigarette mainstream smoke based on nickel oxide and preparation method thereof
  • Catalyst for selectively reducing hydrogen cyanide release in cigarette mainstream smoke based on nickel oxide and preparation method thereof
  • Catalyst for selectively reducing hydrogen cyanide release in cigarette mainstream smoke based on nickel oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dry 10 grams of 40-80 mesh alumina carrier at 150 degrees Celsius for 12 hours, and mix with 25 milliliters of 5mol / L NH 4 The F aqueous solution was mixed, then dried at 100°C for 12 hours, and calcined at 500°C for 4 hours to obtain a pretreated alumina carrier for future use. Then, using an equal volume impregnation method, 0.167 grams of nickel chloride hexahydrate was formulated into a corresponding aqueous solution, and 1 gram of pretreated alumina carrier was added to the solution, and dried at 70 degrees Celsius for 48 hours to obtain a catalyst precursor . Finally, the catalyst precursor was calcined at 400 degrees Celsius for 4 hours under the protection of an air atmosphere to obtain a catalyst.

[0025] A section of filter column (15mm length) added with 50mg of catalyst is arranged on the filter tip close to the shredded tobacco section to make a composite filter tip and make a cigarette. The sample processing and smoking environment are in accordance wit...

Embodiment 2

[0029] Dry 10 grams of 40-80 mesh alumina carrier at 150 degrees Celsius for 12 hours, and mix with 25 milliliters of 5mol / L NH 4 The F aqueous solution was mixed, then dried at 100°C for 12 hours, and calcined at 500°C for 4 hours to obtain a pretreated alumina carrier for future use. Then, using the equal volume impregnation method, 0.032 grams of nickel chloride hexahydrate was prepared into a corresponding aqueous solution, and 1 gram of pretreated alumina carrier was added to the solution, and dried at 70 degrees Celsius for 48 hours to obtain a catalyst precursor . Finally, the catalyst precursor was calcined at 400 degrees Celsius for 4 hours under the protection of an air atmosphere to obtain a 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 eff...

Embodiment 3

[0034] Dry 10 grams of 40-80 mesh alumina carrier at 150 degrees Celsius for 12 hours, and mix with 25 milliliters of 5mol / L NH 4 The F aqueous solution was mixed, then dried at 100°C for 12 hours, and calcined at 500°C for 4 hours to obtain a pretreated alumina carrier for future use. Then, using the equal volume impregnation method, 0.003 grams of nickel chloride hexahydrate was formulated into a corresponding aqueous solution, and 1 gram of pretreated alumina carrier was added to the solution, and dried at 70 degrees Celsius for 48 hours to obtain a catalyst precursor . Finally, the catalyst precursor was calcined at 400 degrees Celsius for 4 hours under the protection of an air atmosphere to obtain a 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 reduction e...

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Abstract

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. A nickel oxide-based catalyst for selectively reducing the release of hydrogen cyanide in cigarette mainstream smoke, the catalyst is composed of the following components in terms of mass percentage: nickel oxide, 0.1% to 5%, alumina carrier, 95 %~99.9%. Because the present invention adopts the above-mentioned technical scheme, the catalyst adopts the preparation method of an eggshell catalyst, so that the active metal is concentrated on the surface of the carrier, and the content of the active metal is reduced, thereby reducing the effect of the addition of the catalyst in the filter tip on cigarette smoking. impact, the catalyst production process is simple, and has a certain particle size, providing a catalyst suitable for cigarette applications, the composite filter made can selectively reduce the hydrogen cyanide release of about 60% in the mainstream smoke of cigarettes, and has great Good application prospects.

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 Patents(China)
IPC IPC(8): B01J23/83A24D3/16
Inventor 周国俊沈凯郭杨龙储国海夏俊夏倩徐建肖卫强李霞卢昕博史春云詹望成俎健
Owner CHINA TOBACCO ZHEJIANG IND
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