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 loss of efficiency and small exchange capacity, etc., and achieve the effect of reducing harmful substances

Inactive Publication Date: 2003-10-22
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] (1) 500ml 3-aminopropyl triethoxysilane, namely KH550 and 5000ml acetone are fully mixed in the plastic bucket of 20 liters, leave standstill for 30 minutes;

[0022] (2) Take 2 kilograms of silica gel with a particle size of 60-80 mesh, place it in a 20-liter plastic bucket, fully mix it with the above-mentioned reaction solution, and let the mixed solution stand at room temperature for 48 hours, with occasional shaking;

[0023] (3) after the reaction finishes, filter and air dry, and then dry at 90-100 ° C for 48 hours;

[0024] (4) After collection, put it into a sample bag for later use;

[0025] (5) The obtained sample is made into a composite tip stick, and then made into a filter cigarette.

[0026] (6) After the obtained cigarettes are balanced, tests of related items are carried out.

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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, a preparation method thereof and its application as a composite filter tip additive in cigarettes. Background technique [0002] The improvement of the composition of cigarette smoke by improving the filter tip has become the research object of many tobacco researchers; the filter tip is mainly improved by the method of composite filter rod, selection of filter material, and processing of filter material. Among them, the composite filter rod mainly disperses additives with certain adsorption performance (or sandwiches between two filter materials to form a three-stage compound) in a suitable filter material, and then combines it with other filter materials. There are many additives that can be used, one of which is some porous adsorbents such as activated carbon, sepiolite, montmorillonite, medical stone, silica gel, hydroxyapatite, anion and cation exchange resins, etc....

Claims

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Application Information

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IPC IPC(8): A24D3/14C07F7/18
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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