Modified silica-gel preparation process 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 disappearing efficiency and small exchange capacity, and achieve the effect of reducing harmful substances

Inactive Publication Date: 2006-06-28
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 preparation process and use thereof
  • Modified silica-gel preparation process and use thereof

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] (1) Fully mix 500ml 3-aminopropyltriethoxysilane, namely KH550, and 5000ml acetone in a 20-liter plastic bucket, and let stand for 30 minutes;

[0024] (2) Take 2 kg of silica gel with a particle size of 60-80 mesh, put it in a 20-liter plastic bucket, fully mix it with the above reaction solution, and let the mixture stand at room temperature for 48 hours, shaking it occasionally;

[0025] (3) After the reaction is finished, filter and dry in the air, and then dry at 90-100°C for 48 hours;

[0026] (4) After collection, put it into a sample bag for subsequent use;

[0027] (5) The obtained sample is made into a composite tip stick, and then prepared into a filter cigarette.

[0028] (6) After the obtained cigarette is balanced, carry out the test of relevant items.

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Abstract

The present invention relates to the surface structure characteristics of a product obtained by using silicon gel and 3-aminopropyl triethoxy-silane and making them react in acetone solution, its preparation method and application of said product as composite filter tip additive in the cigarette. Said invented surface-modified silicon gel can be used in the production of composite filter-tipped cigarette, specially the product obtained in acetone medium can effectively reduce nicotine content, and can reduce tar content in the main smoke by 2-3 mg and can reduce benzo[alpha] pyrene content bag above 30%.

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): C07F7/18A24D3/14
Inventor 刘建福喻昕谭海风谭英刘德华曹继红
Owner CHINA TOBACCO HUNAN INDAL CORP
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