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Polyimidazole ionic liquid supported silica gel and preparation method thereof

An ionic liquid, imidazole type technology, applied in the field of polymeric imidazole type ionic liquid supported silica gel and its preparation, can solve the problems of difficult removal of sulfides and difficult degradation of nitrophenolic compounds, and achieves elimination of matrix interference and good enrichment and purification. effect, the effect of improving the detection sensitivity

Inactive Publication Date: 2019-01-22
WUHU YANGZHAN NEW MATERIAL TECH SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the deficiencies in the prior art above, the technical problem to be solved by the present invention is to propose a polymeric imidazole type ionic liquid-loaded silica gel and a preparation method thereof. The surface of silica gel solves the problems of difficult removal of sulfides in oil and difficult degradation of nitrophenol compounds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Pretreatment: weigh 25g of 1-vinylimidazole, add an appropriate amount of CaH 2 Soak for 24h. The 1-vinylimidazole treated with water removal was filtered to remove unreacted CaH 2 , and then distilled under reduced pressure at 110 °C to obtain purified 1-vinylimidazole; 8 g of CaCl 2 Add 500 mL of toluene and let it stand for 8 h, the supernatant is refluxed at 120 °C for 6 h, distilled under reduced pressure at 135 °C, and the fractions at 100 °C are collected; 8 g of CaCl 2 Add 500 mL of benzene and let it stand for 12 h, the supernatant is refluxed at 100 °C for 6 h, distilled at 110 °C under reduced pressure, and the fractions at 80 °C are collected; about 2.5 g of spherical silica gel with uniform particle size (average particle size is 40-70 μm) is weighed and placed In 200mL V / V=1:1 HCl aqueous solution, stand for 12h, wash and filter with double distilled water until the filtrate becomes neutral, and dry in a muffle furnace at 300°C for 6h;

[0023] (2) ...

Embodiment 2

[0027] (1) Pretreatment: Weigh 25g of 1-vinyl-3-ethylimidazole, add an appropriate amount of CaH 2 Soak for 24h. 1-Vinyl-3-ethylimidazole treated with water removal was filtered to remove unreacted CaH 2 , and then distilled under reduced pressure at 110 °C to obtain purified 1-vinyl-3-ethylimidazole; 8 g of CaCl 2Add 500 mL of toluene and let stand for 10 h, the supernatant is refluxed at 120 °C for 6 h, distilled under reduced pressure at 135 °C, and the fractions at 100 °C are collected; 8 g of CaCl 2 Add 500 mL of benzene and let stand for 12 h, the supernatant is refluxed at 100 °C for 6 h, distilled under reduced pressure at 110 °C, and the fractions at 80 °C are collected; about 8 g of spherical silica gel with uniform particle size (average particle size is 50 μm) is weighed and placed in 200 mL V / V=1:1 HCl aqueous solution, let stand for 12h, wash and filter with double distilled water until the filtrate is neutral, and dry in a muffle furnace at 400°C for 5h;

[...

Embodiment 3

[0032] (1) Pretreatment: Weigh N-allylimidazole, add an appropriate amount of CaH 2 Soak for 24h. The water-removed N-allylimidazole was filtered to remove unreacted CaH 2 , and then under reduced pressure distillation at 110 ° C to obtain purified N-allylimidazole; 8 g of CaCl 2 Add 500 mL of toluene and let stand for 12 h, the supernatant is refluxed at 120 °C for 6 h, distilled at 135 °C under reduced pressure, and the fractions at 100 °C are collected; 8 g of CaCl 2 Add 500 mL of benzene and let stand for 12 h, the supernatant is refluxed at 100 °C for 6 h, distilled under reduced pressure at 110 °C, and the fractions at 80 °C are collected; about 10 g of spherical silica gel with uniform particle size (average particle size is 70 μm) is weighed and placed in 200 mLV / V=1:1 HCl aqueous solution, let stand for 12h, wash and filter with double distilled water until the filtrate is neutral, and dry in a muffle furnace at 450°C for 3h;

[0033] (2) Preparation of imidazole ...

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Abstract

The invention discloses a polyimidazole ionic liquid supported silica gel and a preparation method thereof. The polyimidazole ionic liquid supported silica gel comprises, by weight, 20-25 parts of a vinylimidazole monomer, 20-25 parts of a vinylimidazole acid radical ionic liquid, 35-45 parts of a silane coupling agent, 0.01-0.06 part of an initiator, 5-10 parts of a drying agent, 5-500 parts of asolvent, 2-12 parts of spherical silica gel, 0.01-0.3 part of a catalyst and 100-1000 parts of a washing liquid. The polyimidazole ionic liquid supported silica gel is applied to the field of adsorption desulfurization, and has the advantages of firmness and uniformity in adsorption, high activity, realization of repeated adsorption and desorption, good utilization rate is good, and realization of remarkable effect after repeated use.

Description

technical field [0001] The invention belongs to the technical field of silica gel, and in particular relates to a polymeric imidazole type ionic liquid-supported silica gel and a preparation method thereof. Background technique [0002] In recent years, air pollution has received more and more attention. Since 2000, the frequency and severity of smog weather in China has become increasingly worrying. At present, the frequent haze areas in China include North China, East China, South China and Southwest China, almost all over the country. There are many reasons for the frequent occurrence of haze weather, and the burning of fossil fuels is one of the reasons that cannot be ignored. Especially automobile exhaust emission is a major hidden danger of air pollution in my country. The impact of sulfur compounds in oil products on the environment and automobiles cannot be underestimated. SO2 produced by combustion of sulfur compounds in automobile fuel x It will lead to poison...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C10G25/00C02F101/34
CPCB01J20/103B01J20/26C02F1/285C02F2101/345C10G25/003C10G2300/202
Inventor 张春松
Owner WUHU YANGZHAN NEW MATERIAL TECH SERVICE CO LTD
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