Patent ID: 7628197
Filing Date: 2009-12-08
Classification: B01D,C10G,Y10S

Abstract:
1. A process for water quenching a pyrolysis furnace effluent, comprising: partially quenching a hydrocarbon stream comprising gas and oil vapor with a first quench water stream to form a mixed vapor-liquid stream; feeding the mixed vapor-liquid stream to a water quench tower to separate the vapor and liquid; further quenching the separated vapor with a second quench water stream in the quench tower to form an overhead vapor product comprising light hydrocarbons; collecting water and liquid hydrocarbons from the quench tower in an oil-water separator; recovering the liquid hydrocarbons from the oil-water separator; recovering water from the oil-water separator; cooling a portion of the recovered water; and recycling the cooled water to the first and second quench water streams.