Union Carbide Corporation

James S Davis

John B Saunders

Eric Kramer

A process for separating a hydrocarbon feed gas mixture comprising at least C.sub.1 -C.sub.2 constituents including ethylene to produce a separated ethylene product. The disclosed process employs a recovery section in which demethanization is carried out at moderate pressure, thereby permitting efficient and economical use of propylene-ethylene refrigeration in the process.

Ethylene separation process

A process for separation of water and cyclic hydrocarbons from a gas mixture containing hydrogen, methane, water and cyclic hydrocarbons. An adsorption zone is provided including two adsorbent beds connected in series, one of the beds containing an adsorbent selective for cyclic hydrocarbons and the other bed containing an adsorbent selective for water. Following the passage of gas mixture through the beds, the bed containing cyclic hydrocarbon-selective adsorbent is regenerated with hydrogen-rich purge gas and the bed containing water-selective adsorbent is regenerated with aliphatic hydrocarbon-rich purge gas.

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North Tonawanda, NY, United States of America

James S Davis