Prepurification of toluene dealkylation effluent gas

Abstract From the Canadian patent

Abstract of the Disclosure, 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 waterselective adsorbent is regenerated with aliphatic hydrocarbon-rich purge gas.