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Preparation method of porous composite material for reducing harmful substances in flue gas

A technology of porous composite materials and harmful components, applied in chemical instruments and methods, tobacco, smoke oil filter elements, etc., can solve the problems of increasing the cost of cigarettes, surface deposition and inactivation, etc., and achieve high reaction selectivity, easy-to-obtain products, The process is simple and easy to grasp the effect

Inactive Publication Date: 2012-07-11
HUABAO FLAVOURS & FRAGRANCES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, many research results are focused on the binary composite filter containing nano-precious metal (including Au, Pd, Ti) catalytic materials. Although this kind of filter rod has a good catalytic effect, its catalytic activity needs to be obtained in a special production environment. develop
At the same time, these methods use precious metals to make catalytic materials and add them to the filter to achieve the purpose of low-temperature catalytic oxidation of CO, so it will inevitably increase the cost of cigarette production, which is difficult for general manufacturers to accept; The deposition of gas condensate on the surface of the catalyst and the deactivation of the catalyst. At present, there is no cigarette product that can effectively reduce CO, crotonaldehyde and polycyclic aromatic hydrocarbons (PAHs) in cigarettes.

Method used

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  • Preparation method of porous composite material for reducing harmful substances in flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Accurately measure tetraethyl orthosilicate: Fe(NO 3 ) 3 9H 2 O: Ce(NO 3 ) 3 ·6H 2 O: NaOH: cetyltrimethylammonium bromide: sodium laurate: water=1: 0.02: 0.02: 0.5: 0.2: 0.02: 70, stirred in the reactor for 3 hours to obtain a gelatinous mixture at 150 ℃ for 20-24 hours in a high-pressure reactor, and then adjust the pH of the reactant in the kettle to 8 with NaOH, then continue heating for 48 hours, and take out the reactant after cooling to room temperature. The reactants were washed with deionized water and dried, and then calcined at a high temperature of 600° C. for 3 hours, and the calcined products were pulverized and passed through a 150-mesh sieve to obtain the porous composite material.

Embodiment 2

[0024] Accurately measure tetraethyl orthosilicate: Fe(NO 3 ) 3 9H 2 O: Ce(NO 3 ) 3 ·6H 2 O: NaOH: cetyltrimethylammonium bromide: sodium laurate: water=1: 0.02: 0.02: 0.5: 0.2: 0.02: 70, stirred in the reactor for 1 hour, and obtained the gel-like mixture at 100 ℃ for 20-24 hours in a high-pressure reactor, then adjust the pH of the reactant in the kettle to 10 with NaOH, then continue heating for 2 days, and take out the reactant after cooling to room temperature. The obtained reactants were washed and dried, and then calcined at a high temperature of 500° C. for 8 hours, and the calcined products were pulverized and passed through a 200-mesh sieve to obtain the porous composite material.

[0025] Choose 10 filter tips with the porous composite material added and 10 cigarettes with the porous composite material of Example 2 added to the shredded tobacco. Among them, 5 add 0.5% of the porous composite material based on the total weight of tobacco leaves in the filter ti...

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Abstract

The invention relates to a preparation method of a porous composite material for reducing harmful substances in flue gas. The preparation method comprises the following steps: allowing reactions to take place among tetraethylorthosilicate, Fe(NO3)3.9H2O, Ce(NO3)3.6H2O, NaOH, hexadecyltrimethylammonium bromide, sodium laurate and water, and calcining to obtain the porous composite material. The porous composite material can significantly reduce polycyclic aromatics, CO, crotonaldehyde and other harmful substances in flue gas.

Description

【Technical field】 [0001] The invention relates to the preparation of additives in cigarette filters. More specifically, the present invention relates to a method for preparing a porous composite material for reducing harmful components in smoke, the product obtained by the method and its application in cigarette filters. 【Background technique】 [0002] CO produced during cigarette smoking and mainly present in the gaseous phase of cigarette smoke is a typical substance harmful to human body. The pyrolysis of tobacco produces about 30% of the carbon monoxide, and the remaining harmful components such as polycyclic aromatic hydrocarbons (PAHs), NH 3 , HCN, nitrosamines, etc. Once CO is inhaled into the human body, it will combine with hemoglobin to form very stable carboxyhemoglobin. Once carboxyhemoglobin is formed, hemoglobin loses its ability to transport oxygen, causing tissue hypoxia and tissue hypoxia. Carbon monoxide can also affect the permeability of blood lipids ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J23/83B01J35/10A24D3/14
Inventor 袁毅沈瑞雪
Owner HUABAO FLAVOURS & FRAGRANCES CO LTD
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