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Application method of cigarette smoke heavy metal ion adsorbent obtained through chemical cross-linking

A technology of cigarette smoke and chemical cross-linking, which is applied in the direction of chemical instruments and methods, applications, and other chemical processes, can solve the problems of large amount of polyethyleneimine, etc., to improve selectivity, maintain mechanical strength, increase ratio The effect of surface area

Active Publication Date: 2013-03-13
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies by Zeng Guangming et al. have shown that polyethyleneimine cross-linked on the magnetic porous composite through γ-chloropropyltrimethylsilane has a good adsorption effect on heavy metal ions in aqueous solution, but polyethyleneimine has a very good adsorption effect during the synthesis process. A large amount of amine

Method used

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  • Application method of cigarette smoke heavy metal ion adsorbent obtained through chemical cross-linking
  • Application method of cigarette smoke heavy metal ion adsorbent obtained through chemical cross-linking
  • Application method of cigarette smoke heavy metal ion adsorbent obtained through chemical cross-linking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Pass the silica gel dried to constant weight through a 40-60 mesh sieve, then place it in a 120°C oven and heat it for 5-8 hours at high temperature to activate it to obtain the activated silica gel.

Embodiment 2

[0026] Take out 5g of activated silica gel after drying, put it into a dry three-necked flask, use about 30mL of xylene solvent, heat and stir to 80°C, then add about 10mL of propylene oxide, control the reaction temperature at about 90°C, and prepare epoxidized of silicone. After reacting for 6 hours, filter the reaction product with suction, dry the epoxidized silica gel at 100°C for 30 minutes, put it into a Soxhlet extraction tube and extract it with toluene for 24 hours, remove excess propylene oxide in the product, and put it in a vacuum drying oven Dry at 80°C for 20 hours to obtain epoxidized silica gel.

[0027] Put the dried epoxidized silica gel into a three-necked flask, add 50% polyethyleneimine aqueous solution with a molecular weight of 70,000, so that the mass ratio of polyethyleneimine to silica gel in the adsorbent is 2.5:100, at 90°C The reaction was stirred for 8h. After the reaction, rinse with a large amount of water, filter with suction, and put it int...

Embodiment 3

[0031] Take out 5g of activated silica gel after drying, put it into a dry three-necked flask, use xylene as solvent about 30mL, heat and stir to 80°C, then add about 10mL of propylene oxide, and control the reaction temperature at about 90°C to prepare epoxy melted silica gel. After reacting for 6 hours, filter the reaction product with suction, dry the epoxidized silica gel at 100°C for 30 minutes, put it into a Soxhlet extraction tube and extract it with toluene for 24 hours, remove excess propylene oxide in the product, and put it in a vacuum drying oven Dry at 80°C for 20 hours to obtain epoxidized silica gel.

[0032] Put the dry epoxidized silica gel into a three-necked flask, add 50% polyethyleneimine aqueous solution with a molecular weight of 70,000, so that the mass ratio of polyethyleneimine to silica gel in the adsorbent is 5:100, at 90°C The reaction was stirred for 8h. After the reaction, rinse with a large amount of water, filter with suction, and put it into...

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Abstract

The invention discloses an application method of a cigarette smoke heavy metal ion adsorbent obtained through chemical cross-linking. The adsorbent is obtained through cross-linking activated silica gel and polyethylenimine with a certain proportion through epoxy propane. According to the invention, the prepared adsorbent can preferably adsorb heavy metal in the smoke when added to a cigarette filter and has the advantages of large adsorbing capacity and high speed. Moreover, the making method for the adsorbent has the advantages of simplicity, easiness in operation, less raw material types, low production cost and no need of repeated granulation and is suitable for large-scale industrial production; and the defect that physical characteristics of silica gel particles in the making process are damaged is avoided.

Description

technical field [0001] The invention belongs to the technical field of cigarette harm reduction and environmental protection, and in particular relates to an application method of a polyethyleneimine-modified heavy metal adsorbent capable of large-scale production. Background technique [0002] The World Health Organization (WHO) and the "Framework Treaty on Tobacco Control" have increasingly stringent controls on tobacco products; with the continuous improvement of living standards, consumers' awareness of their own health protection and environmental protection awareness is also increasing, and the safety of cigarettes requirements are also getting higher. Therefore, it is a trend to develop low-harm cigarette products. [0003] The heavy metals in cigarette smoke mainly come from tobacco itself, and the heavy metal elements in tobacco mainly come from the soil, water and air polluted by heavy metals in the tobacco planting environment. Heavy metal elements such as lead,...

Claims

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Application Information

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IPC IPC(8): A24D3/06B01J20/26B01J20/30
Inventor 文建辉银董红肖勇秦亮生成乐为肖晓明
Owner CHINA TOBACCO HUNAN INDAL CORP
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