Modified porous hypercrosslinked polymers for co2 capture and conversion

Abstract

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.

Description

technical field [0001] The present invention relates to a process for the preparation of hypercrosslinked porous polymeric materials by self-polymerization of benzyl halides and coupling with nitrogen-containing moieties. The polymeric material obtained from the process can be used under heterogeneous conditions as a catalyst for the conversion of substrates by reaction with trapped gases. Background technique [0002] with imidazole Salt-modified porous materials have received extensive attention because of their potential applications in catalysis, gas separation, and energy-related technologies. According to current technology, imidazole Salts are mainly immobilized onto the surface of porous inorganic materials such as silica or metal oxides. Due to the difficulty in the synthesis of porous organic materials, the imidazole Salt fixation to such materials has received significantly less attention. Although the microporous backbone imidazole Organic frameworks an...

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Problems solved by technology

Although this approach has been successfully applied to some simple aromatic compounds, there are still limitations regarding the scope of substrates, especially for monomers with specific functional groups

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