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Silica gel with ionic liquid and mercaptan loaded on surface as well as preparation method and application

An ionic liquid and surface-loaded technology, applied in the fields of application, chemical instruments and methods, and other chemical processes, can solve problems such as not being well-known, and achieve obvious effects, simple preparation methods, and reduced usage

Active Publication Date: 2014-01-22
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no good polymer cigarette additive that can simultaneously reduce tar and heavy metals in the existing cigarette research and development technology

Method used

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  • Silica gel with ionic liquid and mercaptan loaded on surface as well as preparation method and application
  • Silica gel with ionic liquid and mercaptan loaded on surface as well as preparation method and application
  • Silica gel with ionic liquid and mercaptan loaded on surface as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Silicone surface activation treatment

[0046] Weigh 100g of silica gel, soak it in pH 3.0 hydrochloric acid solution (500mL) for 24h to generate a large number of hydroxyl groups on the surface of silica gel, then wash repeatedly with deionized water, and then wash with AgNO 3 Solution Detection of Cl in Water Wash - ions until Cl-free - In the presence of ions, dry in the air, and then dry at 150 ° C for 12 hours before use.

[0047] (2) Preparation of N-propyl-4,5-dihydroimidazole (compound 1) grafted on the surface of silica gel

[0048] Weigh 10 grams of silica gel (SiO 2 ), ultrasonically dispersed in 100mL of anhydrous toluene, and then added dropwise 10.68mmol of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole under the protection of nitrogen, vigorously stirred, in After reacting at 110°C for 24 hours, cool to room temperature, filter and separate the product, wash repeatedly with anhydrous methanol, dry at 80°C for 1 hour, and then dry at 150°C for 1...

Embodiment 2

[0054] (1) Silicone surface activation treatment

[0055] With embodiment 1.

[0056] (2) Preparation of N-propyl-4,5-dihydroimidazole (compound 1) grafted on the surface of silica gel

[0057] Weigh 10 grams of silica gel (SiO 2 ), ultrasonically dispersed in 100mL of anhydrous toluene, and then added dropwise 10.68mmol of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole under the protection of nitrogen, vigorously stirred, in After reacting at 110°C for 24 hours, cool to room temperature, filter and separate the product, wash repeatedly with anhydrous methanol, dry at 80°C for 1 hour, and then dry at 150°C for 12 hours to obtain compound 1 grafted with propylimidazole on the silicon surface.

[0058] (3) Preparation of ionic liquid (compound 2) loaded with 1-(2’,3’-dihydroxypropyl)-imidazolium chloride on the surface of silica gel

[0059] Weigh 10g of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole modified compound 1, ultrasonically disperse it in 100mL of anhydrous ...

Embodiment 3

[0063] (1) Silicone surface activation treatment

[0064] With embodiment 1.

[0065] (2) Preparation of N-propyl-4,5-dihydroimidazole (compound 1) grafted on the surface of silica gel

[0066] Weigh 10 grams of silica gel (SiO 2 ), ultrasonically dispersed in 100mL of anhydrous toluene, and then added dropwise 10.68mmol of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole under the protection of nitrogen, vigorously stirred, in After reacting at 110°C for 24 hours, cool to room temperature, filter and separate the product, wash repeatedly with anhydrous methanol, dry at 80°C for 1 hour, and then dry at 150°C for 12 hours to obtain compound 1 grafted with propylimidazole on the silicon surface.

[0067] (3) Preparation of ionic liquid (compound 2) loaded with 1-(2’,3’-dihydroxypropyl)-imidazolium chloride on the surface of silica gel

[0068] Weigh 10g of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole modified compound 1, ultrasonically disperse it in 100mL of anhydrous ...

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Abstract

The invention discloses silica gel with an ionic liquid and mercaptan loaded on the surface as well as a preparation method and an application. The preparation method comprises the steps as follows: 1-(3-ethoxy silane propyl)-4, 5-dihydroimidazole is taken as a silane coupling agent, N-propyl-4, 5-dihydroimidazole is grafted on the surface of acidized silica gel and further reacts with 3-chlorine-1, 2-propylene glycol to obtain a 1-(2', 3'-dyhydroxylpropyl)-imidazole chloride ionic liquid loaded on the surface of silica gel; and under the catalytic action of p-toluenesulfonic acid, the 1-(2', 3'-dyhydroxylpropyl)-imidazole chloride ionic liquid loaded on the surface of silica gel further has an esterification reaction with thioglycollic acid to obtain ionic liquid functionalized mercaptan loaded on the surface of the silica gel. The ionic liquid functionalized mercaptan loaded on the surface of the silica gel is added into a cigarette filter stick for rolling cigarettes; and flue gas analysis shows that ionic liquid functionalized mercaptan loaded on the surface of the silica gel is added into the filter stick, so that 10%-30% of Cd, 10%-25% of Cr and 5%-20% of Pb of mainstream smoke of cigarettes can be effectively reduced, and besides, 10%-30% of tar of cigarettes further can be reduced.

Description

technical field [0001] The invention relates to a novel polymer cigarette adsorbent; a macromolecule cigarette additive capable of reducing heavy metal release and tar content in cigarette mainstream smoke, a preparation method and application. Background technique [0002] Tar and harmful components in cigarette smoke such as lead (Pb), arsenic (As), cadmium (Cd), chromium (Cr), mercury (Hg) and other heavy metals are easy to accumulate in the human body and cause harm [Chen, Q-H. et al., Studies of Trace Elements and Health, 2005, 22, 47-49]. In 1989, the United States listed seven heavy metal elements, including As, Cd, Cr, Pb, Ni, Cu, and Hg, into 107 harmful components of cigarette smoke. In 1990, the Hoffman list also included As, Cd, Cr, Pb, Ni, and Se , Hg and other 7 kinds of heavy metal elements are included in the 44 kinds of harmful components in tobacco. According to reports [Zhang Lingdi et al., Chinese Journal of Health Inspection, 2001,11(5):520], in the pr...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30A24D3/14
Inventor 银董红秦亮生文建辉成乐为黄嘉若
Owner CHINA TOBACCO HUNAN INDAL CORP
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