초록 ▼

A process is provided for the separation of ethane from methane-containing feedstreams using pressure-swing adsorption wherein the adsorbent is a faujasite type of zeolitic aluminosilicate containing at least 20 equivalent percent of at least one cation species selected from the group consisting of

A process is provided for the separation of ethane from methane-containing feedstreams using pressure-swing adsorption wherein the adsorbent is a faujasite type of zeolitic aluminosilicate containing at least 20 equivalent percent of at least one cation species selected from the group consisting of zinc, rare earth, hydrogen, ammonium and calcium and containing not more than 80 equivalent percent of alkali metal or alkaline earth metal cations other than calcium.

대표청구항 ▼

A pressure swing adsorption process for the separation of ethane from a feedstream comprising mixtures thereof with methane, said process comprising: (a) passing the feedstream at an upper adsorption pressure through an adsorption zone containing a zeolitic molecular sieve of the faujasite type havi

A pressure swing adsorption process for the separation of ethane from a feedstream comprising mixtures thereof with methane, said process comprising: (a) passing the feedstream at an upper adsorption pressure through an adsorption zone containing a zeolitic molecular sieve of the faujasite type having a framework SiO2/Al2O3 molar ratio of from 2 to 100 and containing at least 20 equivalent percent of zinc cations and containing not more than 80 equivalent percent of alkali or alkaline earth metal cations or mixtures thereof, wherein ethane and methane are adsorbed and recovering an adsorption effluent stream enriched in methane relative to the feedstream; (b) regenerating the adsorption zone by depressurizing the adsorption zone to a desorption pressure, said desorption pressure being lower than said adsorption pressure, and recovering a desorption effluent stream comprising ethane and methane; and (c) repressurizing the adsorption zone to the adsorption pressure.