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A functional geopolymer material for reducing hydrocyanic acid in cigarette smoke and its application

A geopolymer, cigarette smoke technology, applied in the application, tobacco, e-liquid filter and other directions, can solve the problems of harmful gaseous products, poor stability, poor selectivity, etc., to ensure the adsorption effect, reduce the release amount, and fast adsorption speed Effect

Active Publication Date: 2022-04-12
CHINA TOBACCO JIANGSU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the catalytic oxidation temperature of the catalytic oxidation method is relatively high (such as patents CN1416950A and CN1462652A, the catalytic temperature requires 250-450°C), and harmful gaseous products may be generated, which cannot be applied to the removal of hydrocyanic acid in cigarette smoke; the dilution method It will cause a large loss of cigarette aroma and affect the quality of smoking; the adsorption method has become the most common method at home and abroad to reduce the release of hydrogen cyanide in mainstream cigarette smoke due to its convenient application
[0004] In the research on the removal of hydrocyanic acid in flue gas by adsorption method, the research on activated carbon is more in-depth. Activated carbon has good adsorption, but poor selectivity. It will reduce the smoking quality of cigarettes while adsorbing the gas phase components of flue gas, which has great limitations. Although the existing technology supports the active components capable of selectively adsorbing hydrocyanic acid by loading activated carbon, it cannot effectively solve the above problems
For example: Patent CN103030141A discloses a method for preparing a modified carbon material that selectively reduces the release of hydrocyanic acid in flue gas. By soaking activated carbon in copper sulfate solution, the surface is loaded with copper ions, and the copper ions are selectively adsorbed. For hydrocyanic acid in flue gas, this method has some effect, but the loading effect of copper ions is not good, the loading capacity is small, and the stability is poor, so the adsorption rate for hydrocyanic acid is not high, and the activated carbon itself has carbon The taste has not been eliminated, and the quality of smoking is difficult to improve

Method used

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  • A functional geopolymer material for reducing hydrocyanic acid in cigarette smoke and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A functionalized geopolymer material for reducing hydrocyanic acid in cigarette smoke is a geopolymer loaded with chitosan and nickel ions, and the functionalized geopolymer material is prepared according to the following steps:

[0029] S1. 1g of chitosan is added to 100ml of a mixed solution containing 0.1mol sodium hydroxide and 1.5g of sodium silicate, and stirred for 2 hours at room temperature to obtain an alkali-activated solution;

[0030] S2. Add 2g of nanoclay to the alkali excitation solution, ultrasonically disperse for 45min, then react at 40°C for 1h, and dry the reaction product at 80°C for 48h to obtain a geopolymer composite matrix;

[0031] S3. Immerse the geopolymer composite matrix in a nickel ion solution with a concentration of 1mol / L for 4 hours. The impregnation process is accompanied by stirring, and then dried after immersion to obtain the functionalized geopolymer material Ni 2+ -geopolymer / chitosan.

Embodiment 2

[0033] A functionalized geopolymer material for reducing hydrocyanic acid in cigarette smoke is a geopolymer loaded with chitosan and nickel ions, and the functionalized geopolymer material is prepared according to the following steps:

[0034] S1. Add 0.5g chitosan to 100ml of a mixed solution containing 0.05mol sodium hydroxide and 1.0g sodium silicate, and stir for 1.5h at room temperature to obtain an alkali excitation solution;

[0035] S2. Add 1.5g of nanoclay to the alkali excitation solution, ultrasonically disperse for 0.5h, then react at 38°C for 2.0h, and dry the reaction product at 75°C for 40h to obtain a geopolymer composite matrix;

[0036] S3. Immerse the geopolymer composite matrix in a nickel ion solution with a concentration of 0.5 mol / L for 3 hours. The impregnation process is accompanied by stirring, and then dried after immersion to obtain the functionalized geopolymer material Ni 2+ -geopolymer / chitosan.

Embodiment 3

[0038] A functionalized geopolymer material for reducing hydrocyanic acid in cigarette smoke is a geopolymer loaded with chitosan and nickel ions, and the functionalized geopolymer material is prepared according to the following steps:

[0039] S1. 1.5g chitosan was added to 100ml of a mixed solution containing 0.15mol sodium hydroxide and 2.0g sodium silicate, and stirred at room temperature for 2.5h to obtain an alkali excitation solution;

[0040] S2. Add 2.5g of nanoclay to the alkali excitation solution, ultrasonically disperse for 1h, then react at 45°C for 0.5h, and dry the reaction product at 85°C for 60h to obtain a geopolymer composite matrix;

[0041]S3. Immerse the geopolymer composite matrix in a nickel ion solution with a concentration of 2 mol / L for 5 hours. The impregnation process is accompanied by stirring, and then dried after immersion to obtain the functionalized geopolymer material Ni 2+ -geopolymer / chitosan.

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Abstract

The invention belongs to the technical field of cigarette harm reduction and coke reduction, and specifically discloses a functionalized geopolymer material for reducing hydrocyanic acid in cigarette smoke and its application. The functionalized geopolymer material is loaded with chitosan and The geopolymer of metal ions is obtained by using chitosan, sodium hydroxide, sodium silicate and nanoclay to synthesize a geopolymer composite matrix, and then impregnating the geopolymer composite matrix with a metal ion solution. The synthesis process is simple and the cost is low. Metal ions and chitosan are firmly loaded on the geopolymer, with good stability and high activity. The functionalized polymer material of the present invention has good selectivity and high adsorption rate. Adding it to the cigarette filter can effectively reduce the release of hydrocyanic acid in cigarette smoke without affecting the smoking quality of the cigarette.

Description

technical field [0001] The invention belongs to the technical field of cigarette harm reduction and tar reduction, and in particular relates to a functional geopolymer material for reducing hydrocyanic acid in cigarette smoke and an application thereof. Background technique [0002] Hydrocyanic acid (HCN) is a highly volatile Class A highly toxic substance. After inhalation, it combines with ferric cytochrome oxidase in the body to become cyanide ferric cytochrome oxidase, loses the function of transferring oxygen, and causes tissue Oxygen deficiency and poisoning are extremely harmful to the human body. Hydrocyanic acid is a major harmful substance in cigarette smoke, which is mainly produced by the cracking of amino acids and related compounds at 700-1000°C, and the content in smoke is about 30-300 μg / cigarette. Improving the safety of smoking cigarettes and reducing the release of hydrocyanic acid in cigarettes is an important direction of current tobacco research and an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A24D3/14A24D3/16A24D3/18
CPCA24D3/14A24D3/16A24D3/18
Inventor 李炜吴洋张继光袁益来朱莹
Owner CHINA TOBACCO JIANGSU INDAL