An easy-to-prepare recyclable catalyst of quaternary ammonium nature and based on commercially available and inexpensive macroporous polymeric sorbent Purolite A103 resin has been devised for the carbon dioxide addition to epoxides. The catalyst can be easily separated due to its 0.6–0.85 mm bead size and recycled at least seven times. The catalyst makes it possible to carry out the reaction under solvent-free conditions. It is insensitive to the steric and electronic effects of various epoxy substrates.

中文翻译：

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大孔聚苯乙烯基催​​化剂辅助合成有机环状碳酸酯

一种易于制备的季铵性质的可回收催化剂，基于市售且廉价的大孔聚合物吸附剂 Purolite A103 树脂，已被设计用于将二氧化碳添加到环氧化物中。由于其 0.6-0.85 毫米的珠粒尺寸，催化剂可以很容易地分离，并且至少可以循环使用 7 次。催化剂可以在无溶剂条件下进行反应。它对各种环氧树脂基材的空间和电子效应不敏感。