Various refinery processing schemes such as FCC, coker, high olefin FCC and DCC produce C3 and lighter components that often are rejected to the refinery fuel gas system. Lummus Technology’s Low Pressure Recovery (LPR) technology is a highly-efficient, low-cost and inherently safe process for the recovery of ethylene, propylene, ethane and propane from these and other refinery off-gas streams. The technology upgrades these off-gas streams from fuel value to valuable olefins products. The LPR process typically can receive the off-gas feed at refinery battery limit pressure. Impurities are removed by fixed bed adsorption and caustic or water wash prior to fractionation and recovery of the principal products. The process can be a standalone unit or it can be integrated with the recovery section of a new or existing ethylene plant. It is typically economic when used to recover the C3 and lighter materials on streams that contain a minimum of 30 kta of ethylene, ethane, propylene and propane.