[EN] MODIFIED POROUS HYPERCROSSLINKED POLYMERS FOR CO2 CAPTURE AND CONVERSION<br/>[FR] POLYMÈRES HYPERRÉTICULÉS POREUX MODIFIÉS POUR LA CAPTURE ET LA CONVERSION DE CO2
申请人:AGENCY SCIENCE TECH & RES
公开号:WO2016167725A1
公开(公告)日:2016-10-20
The present disclosure describes a process for making a hyperporous material for capture and conversion of carbon dioxide. The process comprises the steps a first self-polymerisation of benzyl halides via Friedel-Crafts reaction. In the second step the obtained hypercrosslinked polymer is further coupled with an amine or heterocyclic compound having at least one nitrogen ring atom. The invention also relates to the material obtained to the process and its use in catalytic reactions, for instance the conversion of epoxides to carbonates. Salt-modified porous hypercrosslinked polymers obtained according to the invention show a high BET surface (BET surface area up to 926m2/g) combined with strong CO2 capture capacities (14.5 wt%). The nitrogen compound functionalized hypercrosslinked polymer catalyst shows improved conversion rates compared to known functionalized polystyrene materials and an excellent recyclability. A new type of imidazolium salt modified polymers shows especially high capture and conversion abilities. Carbonates can be produced in high yields according to the inventive used of the obtained polymers.
Efficient fixation of CO<sub>2</sub>into cyclic carbonates catalysed by silicon-based main chain poly-imidazolium salts
作者:Jinquan Wang、Jiayu Leong、Yugen Zhang
DOI:10.1039/c4gc01060d
日期:——
A new method for the synthesis of main chain poly-imidazolium salts was developed from bisimidazole and silicon tetrachloride. These types of silicon-based poly-imidazolium salts are found to be among the most efficient metal-free heterogeneous catalysts (TOF = 90 h−1) for the fixation of CO2 with epoxides into cyclic carbonates under metal- and solvent-free conditions.