Patent ID: 7129387
Filing Date: 2006-10-31
Classification: B01D,C07C

Abstract:
1. A process for the recovery and partial purification of ethylene from at least one feed stream introduced into a distillation column pressure shell encasing an upper region comprising an ethylene distributor rectifying section and a lower region comprising a C2 distributor section and an ethylene distributor stripping section, said feed stream comprising ethylene, ethane, a component or components lighter than ethylene, and optionally C3 and heavier components comprising: a. Introducing said feed stream into said C2 distributor section; b. Providing a means for introducing stripping vapor into said C2 distributor section; c. Introducing upflowing vapors from said C2 distributor section and said ethylene distributor stripping section into said ethylene distributor rectifying section; d. Providing a means for introducing stripping vapor into said ethylene distributor stripping section; e. Introducing downflowing liquid from said ethylene distributor rectifying section into said C2 distributor section and said ethylene distributor stripping section; f. Refluxing said ethylene distributor rectifying section; g. Recovering a stream of ethylene, ethane and C3+components from the bottom of said C2 distributor section; h. Recovering a stream of ethane and ethylene from the bottom of said ethylene distributor stripping section; and i. Recovering a stream of ethylene and components lighter than ethylene from the overhead of said ethylene distributor rectifying section.