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Preparation and application of different-crystal-phase FeOOH nanometer materials

A technology of nanomaterials and PH value, applied in the fields of application, nanotechnology, nanotechnology, etc., can solve the problems of large amount of adsorption materials used and complicated addition, and achieve the effect of low cost, simple preparation method, and small amount of use

Active Publication Date: 2015-04-08
SHANGHAI TOBACCO GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned method needs to add a large amount of adsorbent material, and the addition is complicated.

Method used

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  • Preparation and application of different-crystal-phase FeOOH nanometer materials
  • Preparation and application of different-crystal-phase FeOOH nanometer materials
  • Preparation and application of different-crystal-phase FeOOH nanometer materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Weigh 7.9696g of sodium dodecylbenzene sulfonate dissolved in 100ml of absolute ethanol and add it to 2000ml of deionized water after completely dissolving; then weigh 222.416g of ferrous sulfate heptahydrate and add it to the above system, fully stir to make The ferrous sulfate is completely dissolved, and nitrogen is blown into the mixed system for 15-20 minutes to drive off the air in the system, and the solution A is prepared, sealed and stored for later use. Weigh 80g of urea and dissolve it in deionized water to prepare solution B for use.

[0070] After mixing the two solutions of solution A and solution B, transfer them to a 5L three-necked flask, stir, heat to 90℃, keep for 1 hour to fully hydrolyze the urea, add hydrogen peroxide to the system, control the dropping rate so that it does not produce a lot of foam , The amount of adding hydrogen peroxide is about 200ml, which is used to test whether the ferrous ion in the system is completely oxidized. Finally, use...

Embodiment 2

[0072] Weigh 6.9696g of sodium dodecylbenzene sulfonate and dissolve it in 70ml of absolute ethanol, and add it to 1400ml of deionized water after completely dissolving; then weigh 222.416g of ferrous sulfate heptahydrate and add it to the above system, fully stir to make The ferrous sulfate is completely dissolved, and nitrogen is blown into the mixed system for 15-20 minutes to drive off the air in the system, and the solution A is prepared, sealed and stored for later use. Weigh 80g of urea and dissolve it in deionized water to prepare solution B for use.

[0073] Mix the two solutions of solution A and solution B and transfer to a 5L three-necked flask, stir, heat to 85°C, keep for 0.5 hours to fully hydrolyze the urea, add hydrogen peroxide to the system dropwise, control the dropping rate so that it does not produce a lot of foam , Add hydrogen peroxide dropwise to check whether the ferrous ion in the system is completely oxidized. Finally, use a dropping funnel to drop a ...

Embodiment 3

[0075] Weigh 8.3635g of sodium dodecylbenzene sulfonate and dissolve it in 127ml of absolute ethanol, and add it to 2500ml of deionized water after completely dissolving; then weigh 313.712g of ferrous ammonium sulfate and add it to the above system, stir fully to make the sulfuric acid The ferrous iron is completely dissolved. Blow nitrogen into the mixed system for 15-20 minutes to drive off the air in the system, prepare solution A, seal it and store it for later use. Weigh 80g of urea and dissolve it in deionized water to prepare solution B for use.

[0076] After mixing the two solutions of solution A and solution B, transfer them to a 5L three-necked flask, stir, heat to 95℃, keep for 1.5 hours to fully hydrolyze the urea, add hydrogen peroxide to the system, control the dropping rate so that it does not produce a lot of foam , Add hydrogen peroxide dropwise to check whether the ferrous ion in the system is completely oxidized. Finally, use a dropping funnel to drop a 1M s...

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Abstract

The invention provides a preparation method of FeOOH nanometer materials. By preparing a solution A and a solution B, the solution A is used alone or in combination with the solution B at a certain ratio to respectively prepare different-crystal-phase FeOOH nanometer materials under a certain condition, namely, alpha-FeOOH, beta-FeOOH and delta-FeOOH. The invention further discloses a cigarette filter tip added with any one of the different-crystal-phase FeOOH nanometer materials. By adding the different-crystal-phase FeOOH nanometer materials prepared by the preparation method, which is disclosed by the invention, into the cigarette filter tip, the release amount of tobacco-specific nitrosamine in cigarette mainstream smoke can be effectively decreased. The additives for the cigarette filter tip are safe and non-toxic and low in cost and the preparation method is simple and high in yield and is suitable for industrial production.

Description

Technical field [0001] The invention belongs to the technical field of cigarette materials, relates to the preparation and application of FeOOH nanomaterials with different crystal phases, and specifically relates to the preparation of iron oxyhydroxide (FeOOH) nanomaterials with different crystal phases and structures and the selective addition in filter rods. Application to reduce the content of specific nitrosamines (TSNAs) in cigarette smoke. Background technique [0002] The pathogenic factors in tobacco and smoke mainly include polycyclic aromatic hydrocarbons, nitrosamines, etc., among which tobacco-specific nitrosamines N-nitrosamines (TSNAs) are N-nitrosonornicotine (NNN), 4-( Methylnitrosamine)-1-(3-pyridyl)-1-butanone (NNK), N-nitroso neonicotine (NAT), N-nitrosopseudogine (NAB) mainly , This is a specific carcinogen that only exists in tobacco and smoke products. [0003] In recent years, in order to reduce the release of nitrosamines in cigarette smoke, tobacco worke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02B82Y30/00A24D3/04
Inventor 徐同广郑晓曼张杰石睿白若石周骏
Owner SHANGHAI TOBACCO GRP CO LTD
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