A method for solution polymerizing ethylene wherein an ethane purge stream is separated, subjected to high efficiency cryogenic distillation, and a side cut from that distillation recycled to the polymerization process while the overhead and bottoms from that distillation are removed from the polymerization process.

 
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> Process for producing olefin copolymerization catalyst and process for producing olefin copolymer

> Process for the polymerization of olefins
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