The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 1982
Filed:
May. 31, 1978
Christian Benkmann, Munich, DE;
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
In a pressure swing adsorption process for the separation of gases comprising the steps of passing crude gas under a superatmospheric adsorption pressure through a drying bed of H.sub.2 O-selective adsorbent to remove gaseous H.sub.2 O and then passing resultant H.sub.2 O-free gas sequentially through a separate and distinct zeolite-containing adsorbent bed for the removal of low-boiling impurities and the further steps of pressure release, desorption and pressure buildup to adsorption pressure, the improvement in the pressure buildup step which comprises introducing an H.sub.2 O-depleted gas obtained during said process to a point intermediate the drying bed and said zeolite-containing adsorbent bed and passing said H.sub.2 O-depleted gas into the drying bed in a countercurrent direction to the flow of crude gas and into the zeolite-containing adsorbent bed in a cocurrent direction to the flow of crude gas, and continuing said passing of said H.sub.2 O-depleted gas until the pressure buildup is at least 20% of the adsorption pressure.