CUCURBITURIL-POLYETHYLENIMINE-SILICA COMPLEX, PREPARATION METHOD THEREOF AND CARBON DIOXIDE ABSORBENT COMPRISING SAME

• US 20200129957A1
• Filed: 10/24/2019
• Published: 04/30/2020
• Est. Priority Date: 10/26/2018
• Status: Active Grant

• Current Assignee: Korea Institute of Energy Research
• Original Assignee: Korea Institute of Energy Research
• Inventors: KIM, Hyun-uk, PARK, Young Cheol, MOON, Jong-ho, PARK, Hoon Beom, Sohail, Muhammad
• Granted Patent: US 11,642,651 B2
• Time in Patent Office: Days
• CPC Class Codes: B01D 2252/10 Inorganic absorbents
• CPC Class Codes: B01D 2252/20415 Tri- or polyamines
• CPC Class Codes: B01D 2252/2053 Other nitrogen compounds
• CPC Class Codes: B01D 2253/106 Silica or silicates
• CPC Class Codes: B01D 2253/25 Coated, impregnated or composite adsorbents
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2259/40088 by heating
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01D 53/1475 Removing carbon dioxide
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: B01D 53/81 Solid phase processes
• CPC Class Codes: B01D 53/96 Regeneration, reactivation or recycling of reactants
• CPC Class Codes: B01J 20/103 comprising silica
• CPC Class Codes: B01J 20/265 modified or post-treated polymers polymer carriers or substrates subjected to further impregnating or coating B01J20/3208
• CPC Class Codes: B01J 20/28059 being less than 100 m2/g
• CPC Class Codes: B01J 20/283 based on silica
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

The present disclosure relates to a cucurbituril-polyethylenimine-silica complex, a method for preparing the same and a carbon dioxide absorbent containing the same. According to the present disclosure, a cucurbituril-polyethylenimine-silica complex may be prepared by forming a complex wherein a cucurbituril is bound to polyethylenimine and including the same inside silica, and it may be used as a carbon dioxide absorbent with superior thermal stability and prevented formation of urea.

Claims

1. A cucurbituril-polyethylenimine complex wherein a cucurbituril represented by Chemical Formula 1 is bound to polyethylenimine:

2. The cucurbituril-polyethylenimine complex according to claim 1, wherein the cucurbituril represented by Chemical Formula 1 is cucurbit[6]uril, wherein n is 6, each of A₁ and A₂ is independently H, and X is O.

3. The cucurbituril-polyethylenimine complex according to claim 1, wherein the polyethylenimine has a molecular weight of 100-50000.

4. A cucurbituril-polyethylenimine-silica complex comprising a silica and the cucurbituril-polyethylenimine complex according to claim 1, which is included inside the silica.

5. The cucurbituril-polyethylenimine-silica complex according to claim 4, wherein the cucurbituril-polyethylenimine-silica complex has a BET specific surface area of 1-500 m²/g.

6. The cucurbituril-polyethylenimine-silica complex according to claim 4, wherein

the cucurbituril is cucurbit[6]uril,

the polyethylenimine has a molecular weight of 500-12000, and

the cucurbituril-polyethylenimine-silica complex has a BET specific surface area of 20-60 m²/g.

7. A carbon dioxide absorbent comprising the cucurbituril-polyethylenimine complex according to claim 1.

8. A carbon dioxide absorbent comprising the cucurbituril-polyethylenimine-silica complex according to claim 4.

9. A method for preparing a cucurbituril-polyethylenimine complex, which comprises a step of mixing and dispersing a cucurbituril represented by Chemical Formula 1, polyethylenimine and a solvent:

10. The method for preparing a cucurbituril-polyethylenimine complex according to claim 9, the solvent is one or more selected from methanol, ethanol, water, dimethylformamide, diethylformamide, N-methyl-2-pyrrolidone, dimethyl sulfoxide and dimethylacetamide.

11. A method for preparing a cucurbituril-polyethylenimine-silica complex, which comprises:

(a) a step of obtaining a dispersion solution comprising a cucurbituril-polyethylenimine complex by mixing and dispersing a cucurbituril represented by Chemical Formula 1, polyethylenimine and a solvent, and

(b) a step of further mixing silica in the dispersion solution;

12. The method for preparing a cucurbituril-polyethylenimine-silica complex according to claim 11, wherein

the cucurbituril is cucurbit[6]uril,

the polyethylenimine has a molecular weight of 500-12000,

the solvent is anhydrous methanol,

a step of activating the silica at 150-250°

C. for 20-30 hours in advance is further included before the step (b),

a weight ratio of the cucurbituril-polyethylenimine complex and the silica is 1;

0.5-1.5, and

the cucurbituril-polyethylenimine-silica complex has a BET specific surface area of 20-60 m²/g.