| 摘要 |
<p>1506161 Separation of gases PETROCARBON DEVELOPMENTS Ltd 6 March 1975 [12 March 1974] 11000/74 Addition to 1444231 Heading B1L In modifications 'of the pressure swing adsorption process of Parent Specification, the step of regenerating the adsorbent in the removed zone is effected by evacuation of said removed zone and/or the gas initially exiting from said removed zone during depressurisation is recycled to the inlet of the separation section, said recycle being continued until not later than the occurrence of a rapid increase in concentration of adsorbable material in said exit gas. This point may be determined by direct measurement of the concentration or by measurement of the pressure of the exit gas, or a predetermined time interval may be used.</p> |
