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Natural stilbite adsorbent for removing nitrosamine from exhaust gas and preparation method thereof

A technology of stilbite and nitrosamine, which is applied in the field of natural stilbite adsorbent and its preparation, can solve the problems of less zeolite, low added value, application retention, etc.

Inactive Publication Date: 2017-06-13
CHINA TOBACCO GUANGXI IND
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, there are very few detailed studies on this zeolite in China, and its application is only in primary industries with low added value.

Method used

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  • Natural stilbite adsorbent for removing nitrosamine from exhaust gas and preparation method thereof
  • Natural stilbite adsorbent for removing nitrosamine from exhaust gas and preparation method thereof
  • Natural stilbite adsorbent for removing nitrosamine from exhaust gas and preparation method thereof

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Embodiment Construction

[0022] Further describe the present invention by embodiment below:

[0023]

[0024] The characteristics of the modified STI zeolite with good adsorption of nitrosamines etc. in the cigarette tar obtained by the present invention can be characterized by the following methods:

[0025] 1. Powder X-ray Diffraction (XRD). In powder X-ray diffraction, refer to the standard STI pattern to confirm that the product structure has not been destroyed after treatment.

[0026] 2. Segmented temperature programmed roasting (TPH). The zeolite sample used to determine the thermal stability is programmed to heat up to 600°C in a muffle furnace for 2 hours, and then cooled to room temperature after constant temperature for 1 hour. The samples were calcined at a higher temperature, and the relative crystallinity data of the samples treated at 700°C, 800°C, 900°C, and 1000°C were sequentially obtained.

[0027] 3. Infrared spectroscopy (FT-IR). Determine the skeleton vibration peak and th...

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Abstract

According to the invention, natural stilbite (STI) grain is taken as a raw material; the natural stilbite grain is roasted after ammonium exchange, so that the stability of zeolite is promoted; after cation exchange, the grain in 20-40 mesh is formed; and the adsorption property for volatile organic compound in the exhaust gas, such as, nitrosamine, can be promoted. The modified natural stilbite (STI) grain is added into cellulose acetate tow of a filter tip, so that a special compound filter tip for removing the harmful ingredients, such as, voltatile nitrosamine in the mainstream exhaust gas, can be prepared and the preferential adsorption for the nitrosamine in the mainstream exhaust gas can be detected. The natural STI zeolite adopted in the invention is rich in reserve volume; the mining cost is low; the preparation method is simple; the investment in industrialization is less; the production cost is low; and the natural stilbite adsorbent, as the adsorbent for the harmful materials in tobacco, has excellent application prospect.

Description

technical field [0001] The invention belongs to the technical field of modification of natural stilbite, and in particular relates to a natural stilbite adsorbent for removing nitrosamines in flue gas and a preparation method thereof. Background technique [0002] Zeolites have a framework-like structure in which molecules are linked together like a scaffolding within their crystals, forming many cavities in between. Because there are also many water molecules in these cavities, they are hydrous minerals. This water is expelled when exposed to high temperatures, and this does not destroy the crystal structure inside the zeolite. Stilbite belongs to zeolite minerals. There are many pores and channels in the crystal structure. Due to the limitation of the size of the pores or channels, macromolecules can be retained in the crystal structure, or the molecules can pass through smoothly. It is a porous filter material; In the air, it can absorb up to about 30% of the weight of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30A24D3/02
CPCA24D3/0225B01D2258/0283B01J20/16
Inventor 冯守爱周俊刘鸿黄江锋白家峰黄宇亮李志华潘连华陈义昌宋凌勇黄善松务文涛胡超班强黄瑗
Owner CHINA TOBACCO GUANGXI IND
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