Patent ID: 7036337
Filing Date: 2006-05-02
Classification: C01B,F25J,Y10S

Abstract:
1. A process for recovering hydrogen from a feed stream that is comprised of hydrogen, a non condensable gas, and hydrocarbons including a hydrocarbon component selected from the group consisting of: propane, propylene, ethane, and ethylene, wherein the process comprises the steps of: a. stripping most of the hydrogen and non-condensable gas out of the feed stream with methane vapor to form a stripper overhead vapor stream that includes most of the hydrogen from the feed stream and excludes most of the hydrocarbons in the feed stream; b. absorbing most of the non-condensable gas out of the stripper overhead vapor stream with liquid methane to form an absorber overhead vapor stream that contains methane, most of the hydrogen from the stripper overhead stream, and excludes most of the non-condensable gas; c. absorbing methane out of the absorber overhead vapor stream with a liquid lean oil to produce a product vapor stream comprising hydrogen.