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A kind of silica gel with ionic liquid and mercaptan on its surface, its preparation method and application

An ionic liquid and surface-loaded technology, applied in applications, chemical instruments and methods, and other chemical processes, can solve problems such as not being well understood, achieve obvious effects, reduce usage, and increase the number of sulfhydryl groups

Active Publication Date: 2016-08-17
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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  • A kind of silica gel with ionic liquid and mercaptan on its surface, its preparation method and application
  • A kind of silica gel with ionic liquid and mercaptan on its surface, its preparation method and application
  • A kind of silica gel with ionic liquid and mercaptan on its surface, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Silica gel surface activation treatment

[0046] Weigh 100g of silica gel, soak it in pH 3.0 hydrochloric acid solution (500mL) for 24h, so that a large number of hydroxyl groups are generated on the surface of silica gel, then wash repeatedly with deionized water, and then use 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] Take by weighing 10 grams of silica gel (SiO 2 ), ultrasonically dispersed in 100mL of anhydrous toluene, then added dropwise 10.68mmol of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole under nitrogen protection, stirred vigorously, and 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...

Embodiment 2

[0054] (1) Silica gel 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] Take by weighing 10 grams of silica gel (SiO 2 ), ultrasonically dispersed in 100mL of anhydrous toluene, then added dropwise 10.68mmol of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole under nitrogen protection, stirred vigorously, and 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) supported on the surface of silica gel with 1-(2',3'-dihydroxypropyl)-imidazolium chloride

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

Embodiment 3

[0063] (1) Silica gel 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] Take by weighing 10 grams of silica gel (SiO 2 ), ultrasonically dispersed in 100mL of anhydrous toluene, then added dropwise 10.68mmol of N-[3-(triethoxysilyl)propyl]-4,5-dihydroimidazole under nitrogen protection, stirred vigorously, and 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) supported on the surface of silica gel with 1-(2',3'-dihydroxypropyl)-imidazolium chloride

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

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Abstract

A kind of silica gel with ionic liquid and mercaptan on the surface, its preparation method and application: using 1-(3-ethoxysilylpropyl)-4,5-dihydroimidazole as silane coupling agent, on the surface of silica gel after acidification treatment Grafting N-propyl-4,5-dihydroimidazole and further reacting with 3-chloro-1,2-propanediol to obtain a silica gel surface-loaded 1-(2',3'-dihydroxypropyl)-chloro Imidazolium chloride ionic liquid; Under the catalysis of p-toluenesulfonic acid, the ionic liquid of 1-(2',3'-dihydroxypropyl)-imidazole chloride supported on the surface of silica gel is further esterified with thioglycolic acid reaction to obtain a thiol functionalized with an ionic liquid loaded on the surface of silica gel. The thiols functionalized with ionic liquids loaded on the surface of silica gel were added to cigarette filter rods, and the cigarettes were coiled. The analysis of smoke showed that the addition of thiols functionalized with ionic liquids loaded on the surface of silica gel to the filter rods could effectively reduce the The heavy metal cadmium (Cd) content in mainstream smoke is 10-30%, chromium (Cr) content is 10-25%, and lead (Pb) content is 5-20%. In addition, it can also reduce cigarette tar by 10-30%.

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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Patent Type & Authority Patents(China)
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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