Abstract: In a continuous adsorption process using dual towers for separation of a multi-component feed with one tower active and the other on regeneration, automatic switching of the tower feed based on loading of a hydrogen fluoride (HF) component in the active tower is achieved by inferring HF loading based on concentration measurement of acid soluble oil (ASO). An optimum switching point, which switches tower feed near full HF capacity of the active tower but before HF breakthrough occurs, is based on calculating a second derivative for a concentration vs. time curve of ASO in the active bed effluent.

Abstract: Processes and systems for purifying high purity helium group gas which may have been contaminated with water, oxygen and/or hydrogen during its transmission to customers' sites.

Abstract: A system and method for removing volatile organic compounds (VOC's) from a circulating airstream utilizes first and second adsorption beds and first and second adsorption paths alternately coupling the circulating airstream to the respective first and second adsorption beds for removing VOC's during adsorption cycles. First and second desorption loops alternately couple a desorption inert gas through the respective first and second adsorption beds for desorption and regeneration and for recovering VOC's in a VOC condenser. System parameter sensors are distributed in the first and second adsorption paths and first and second desorption loops for sensing system parameters. A programmable controller is coupled to the system parameter sensors, to flow control valves, and to the inert gas heater for controlling the system in response to sensed system parameters. The system parameter sensors include a variety of temperature, O.sub.2, VOC, pressure, and differential pressure sensors.

Abstract: The invention relates to a reactor in which the gas is introduced by a gas feed pipe by at least one tube membrane. The tube membrane consists of a hollow cylinder with perforations or of a metal fabric on which a silicone hose is placed. On the silicone hose there is a fabric reinforcement to which another silicone membrane or a silicone rubber layer is applied.

Abstract: Disclosed herein is a process comprising introducing a chlorine-containing gas through an adsorbent to adsorb chlorine and thereafter reducing the pressure of the adsorbent to a pressure lower than that during the introduction, thereby obtaining an effluent gas with a higher chlorine concentration than that of the introduced gas. Among preferably usable adsorbents are zeolite, non-zeolite-type porous acidic oxides and active carbon.