초록

The present invention provides an improved method for recovering high purity olefins from cracked gas effluents or other parafin/olefin gaseous mixtures by use of a chemical absorption process.

대표청구항 ▼

[ We claim:] [1.] A process for the recovery of olefins from a cracked gas stream comprising ethylene, propylene, hydrogen, methane, ethane, acetylenes, dienes and heavier hydrocarbons, said process comprising the steps of:(a) partially demethanizing said cracked gas stream to remove substantially a

[ We claim:] [1.] A process for the recovery of olefins from a cracked gas stream comprising ethylene, propylene, hydrogen, methane, ethane, acetylenes, dienes and heavier hydrocarbons, said process comprising the steps of:(a) partially demethanizing said cracked gas stream to remove substantially all of said hydrogen from said cracked gas stream to produce a gaseous stream comprising hydrogen and from 15 to 90% of the methane contained in said cracked gas stream and a partially demethanized stream comprising the residual methane and heavier components;(b) contacting said partially demethanized gas stream comprising said residual methane and heavier components with a solution of a metallic salt capable of selectively chemically absorbing the ethylene and propylene to produce a scrubbed paraffin-rich gaseous stream and a chemically absorbed olefin-rich liquid stream; and(c) recovering said olefins from said metallic chemical absorbent solution.