公开(公告)号：US06486375B1

公开(公告)日：2002-11-26

申请号：US09847486

申请日：2001-05-02

申请人： Melissa G. Lenhart ,  Harold L. Dinsmore ,  Scott J. Fox

发明人： Melissa G. Lenhart ,  Harold L. Dinsmore ,  Scott J. Fox

IPC分类号： C07C712

CPC分类号： C07C7/12 ,  C10G5/02

摘要： An improved process for recovering hydrocarbons from an inlet inert gas-hydrocarbon vapor mixture is provided. The inlet mixture is caused to flow through a first bed of solid adsorbent whereby hydrocarbon vapors are adsorbed on the bed and a residue gas stream comprised of substantially hydrocarbon-free inert gas is produced. The hydrocarbon-free inert gas is vented and a second bed of solid adsorbent having hydrocarbon vapors adsorbed thereon is evacuated with an ejector operated by a motive liquid. A major portion of the hydrocarbon vapors is desorbed from the bed and an inert gas and hydrocarbon-rich vapor mixture commingled with the motive liquid is produced. The inert gas and hydrocarbon-rich vapor mixture is separated from the motive liquid and conducted to a point of additional processing or disposal. The flow pattern of the inlet inert gas-hydrocarbon vapor mixture is periodically changed whereby when the bed through which the inlet inert gas-hydrocarbon vapor mixture is flowing becomes loaded, the inlet inert gas-hydrocarbon vapor mixture is caused to flow through the bed which has just been evacuated and the bed loaded with adsorbed hydrocarbon vapors is caused to be regenerated.

公开(公告)号：US5951741A

公开(公告)日：1999-09-14

申请号：US49273

申请日：1998-03-27

申请人： Randall F. Dahl ,  Scott J. Fox ,  Devin E. Greenfield ,  Thomas M. Steiner

发明人： Randall F. Dahl ,  Scott J. Fox ,  Devin E. Greenfield ,  Thomas M. Steiner

IPC分类号： B01D53/047

CPC分类号： B01D53/0446 ,  B01D53/047 ,  B01D2253/102 ,  B01D2256/24 ,  B01D2259/40069 ,  B01D2259/402 ,  B01D2259/4516

摘要： An improved process and apparatus are provided for recovering hydrocarbons from an intermittent or continuous inlet air-hydrocarbon vapor mixture. The air-hydrocarbon vapor mixture is caused to flow through a bed of solid adsorbent whereby hydrocarbons are removed therefrom and a residue gas stream of substantially hydrocarbon-free air is produced. The substantially hydrocarbon-free air is vented into the atmosphere and a second bed of solid adsorbent having hydrocarbons previously adsorbed thereon is regenerated by evacuation. As long as the concentration of hydrocarbons contained in the vented air is below a predetermined concentration, the inlet air-hydrocarbon vapor mixture is caused to continue to flow through the first bed of adsorbent. After the second bed of adsorbent is regenerated, the pumping and evacuation of the second bed is shut down and not restarted so long as the monitored concentration of hydrocarbons is below the predetermined concentration.

摘要翻译： 提供了一种改进的方法和装置，用于从间歇或连续的入口空气 - 烃蒸汽混合物中回收烃。 使空气 - 烃蒸气混合物流过固体吸附剂床，由此从其中除去烃，并且产生基本上无烃的空气的残余气流。 将基本上无烃的空气排放到大气中，并且先前吸附有碳氢化合物的第二固体吸附剂床通过抽空再生。 只要排出空气中所含的烃浓度低于预定浓度，则引入空气 - 烃蒸气混合物继续流过吸附剂的第一床。 在第二床吸附剂被再生之后，只要所监测的烃浓度低于预定浓度，第二床的泵送和排空就被关闭并且不重新启动。