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A preparation method of all-silicon amorphous porous material and its application in cigarette filter

A technology of porous materials and cigarette filters, applied in applications, e-liquid filter elements, chemical instruments and methods, etc., can solve problems such as inability to achieve adsorption effects, achieve easy large-scale production, high feasibility, and reduce the content of irritating substances Effect

Active Publication Date: 2016-02-03
CHINA TOBACCO JIANGSU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the various adsorbents currently disclosed have an adsorption capacity of about 20% or less for volatile carbonyl compounds, especially crotonaldehyde, tobacco-specific nitrosamines, or phenol, which cannot achieve better adsorption effects and harm reduction effects. Further optimization is required

Method used

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  • A preparation method of all-silicon amorphous porous material and its application in cigarette filter
  • A preparation method of all-silicon amorphous porous material and its application in cigarette filter
  • A preparation method of all-silicon amorphous porous material and its application in cigarette filter

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Embodiment 1

[0034] 1. Preparation of all-silicon amorphous porous material by hydrothermal synthesis method: 0.25g of cetyltrimethylammonium bromide (CTAB) was completely dissolved in 35g of deionized water, which was recorded as solution A; 10g of diethyl ether and 1.2g Mix tetraethyl silicate (TEOS) evenly, gradually add 20mL of 0.2mol / L hydrochloric acid solution dropwise, and 14-16% TEOS is pre-hydrolyzed, which is recorded as solution B. Under vigorous stirring, solution B was added dropwise into solution A, and then the solution was adjusted to pH 9.0 with 0.5M sodium carbonate. The formed sol was transferred to an airtight container, stirred at room temperature for 12 h, and then aged at 100° C. for 24 h. The reaction product was filtered, washed thoroughly with deionized water, and dried in air for 15 h to powder. Calcined under nitrogen at 550°C for 5 hours to obtain a porous material, which is designated as CTN1. The specific surface area and pore structure data of CTN1 are sh...

Embodiment 2

[0047] 1. Preparation of all-silicon amorphous porous material by hydrothermal synthesis method: completely dissolve 0.25g cetyltrimethylammonium bromide (CTAB) in 35g deionized water, which is recorded as solution A; mix 10g methyl ethyl ether and 1.75 g of silica sol, and gradually add 5mL of 0.2mol / L phosphoric acid solution dropwise to achieve pre-hydrolysis of 14-16% TEOS, which is recorded as solution B. Under vigorous stirring, solution B was added dropwise into solution A, and then the solution was adjusted to pH 12.0 with 0.1 M NaOH solution. The formed sol was transferred to an airtight container, stirred at room temperature for 10 h, and then aged at 120 °C for 20 h. The reaction product was filtered, washed thoroughly with deionized water, and dried in air for 20 h to powder. Calcined with oxygen at 600°C for 8 hours to obtain a porous material, denoted as CTN2. The specific surface area and pore structure data of CTN2 are shown in Table 2, and the scanning elect...

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Abstract

The invention relates to a preparation method of an all-silicon type amorphous porous material and an application of the all-silicon type amorphous porous material in cigarette filters. Cetyltrimethylammonium bromide is adopted as a template agent for preparing the all-silicon type porous material, the guide action of the template agent is weakened by introducing ether type substances, 10-20% of a silicon source is pre-hydrolyzed, alkali liquor is further used for realizing etching of the material, and a hydrothermal synthesis method is finally adopted for one-step synthesis. The synthesized porous material is directly added into filter sticks during the production process of the cigarette filters, and the using quantity is 2-25mg / cigarette. The prepared cigarette filters can selectively adsorb main harmful ingredients in smoke gas, namely volatile carbonyl compounds, nitrite amine which is peculiar to tobacco, phenol and the like, the adsorption quantity is significantly improved in comparison with the prior art, more aroma and taste ingredients in the smoke gas can be retained, and the sensory quality is better.

Description

technical field [0001] The invention relates to a preparation method of a porous adsorbent and its application in a cigarette filter, in particular to a preparation method of an all-silicon amorphous porous material and its application in a cigarette filter. Background technique [0002] Cigarette mainstream smoke is an ever-changing and extremely complex chemical system. Currently, there are more than 4,000 known compounds in cigarette smoke. Among them, volatile carbonyl compounds, tobacco-specific nitrosamines (TSNAs) and phenol are considered to be harmful substances in mainstream smoke, and have been included in the list of seven harmful substances in cigarette smoke. Studies have shown that the main volatile carbonyl compounds in cigarette smoke, especially eight volatile aldehydes and ketones including formaldehyde, acetaldehyde, acetone, acrolein, propionaldehyde, crotonaldehyde, 2-butanone and butyraldehyde, are harmful to human eyes, Skin and respiratory tract hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04B01J20/16B01J20/30A24D3/16
Inventor 曹毅庄亚东朱怀远刘献军沈晓晨朱莹张映熊晓敏
Owner CHINA TOBACCO JIANGSU INDAL
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