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Modified silica gel and preparation method and use thereof

A silica gel and reaction technology, which is applied in the application field of compound filter additives, can solve the problems of loss of efficiency and small exchange capacity, etc., and achieve the effect of reducing harmful substances

Inactive Publication Date: 2005-06-01
CHINA TOBACCO HUNAN INDAL CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although the weakly basic anion resin with a porous structure is more suitable for the purpose of improving the smoke, it may suffer from the thermal desorption of the retained material due to the small exchange capacity. Like carbon and porous materials, as the smoking progresses, , their efficiency is also gradually disappearing

Method used

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  • Modified silica gel and preparation method and use thereof
  • Modified silica gel and preparation method and use thereof

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Experimental program
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Embodiment Construction

[0032] (1) Fully mix 500ml 3-aminopropyltriethoxysilane, that is, KH550, and toluene in a 20-liter iron bucket, and let stand for 30 minutes;

[0033] (2) Take 2 kg of silica gel with a particle size of 60-80 mesh, fully mix it with the above reaction solution, and let the mixture stand at room temperature for 12-48 hours, shaking it occasionally;

[0034] (3) After the reaction is finished, filter and dry in the air, and then dry at 90-100°C for 48 hours;

[0035] (4) Then it is fully mixed with the 5000ml toluene solution that is dissolved with 250 grams of lauric acid, and heated to 80° C., after reacting for 12 hours, filter, wash, dry, and collect the reaction product.

[0036] (5) The obtained sample is made into a compound tip stick, and then into a filter cigarette.

[0037] (6) After the obtained cigarettes are balanced, the relevant items are tested.

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Abstract

The invention relates to the surface structure characteristics of a product obtained by reacting silica gel, 3-aminopropyltriethoxysilane and lauric acid in toluene solution or ethanol solution, its preparation method and its use as a composite filter tip additive in cigarettes Applications. The product of the present invention, the surface-modified silica gel, can be used in the production of compound filter cigarettes, and can reduce the tar in the mainstream smoke to 1-2 mg, and the benzo[a]pyrene can be reduced by more than 70%.

Description

technical field [0001] The invention relates to a porous structure adsorbent for additives in cigarettes, its preparation method and its application as a composite filter tip additive in cigarettes. Background technique [0002] The improvement of the composition of cigarette gas by improving the filter tip has become the research object of many tobacco researchers; the filter tip is mainly improved through the method of composite filter rod, selection of filter material, and processing of filter material. Among them, the composite filter rod is mainly to disperse the additive with certain adsorption properties (or sandwich it between two sections of filter materials to form a three-stage composite) in a suitable filter material, and then compound it with other filter materials. There are many additives that can be used, one of which is a large class of adsorbents with porous structures such as activated carbon, sepiolite, montmorillonite, medical stone, silica gel, hydroxya...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A24D3/06
Inventor 谭英谭海风喻昕刘德华曹继红刘建福
Owner CHINA TOBACCO HUNAN INDAL CORP
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