Patent ID: 8349263
Filing Date: 2013-01-08
Classification: C10G,Y10S

Abstract:
1. A system for producing propylene, comprising: a dehydrogenation reactor that converts propane in a feed stream to propylene, producing a dehydrogenation reactor effluent, a compressor that compresses the dehydrogenation reactor effluent to form a compressor effluent stream, a first turbine driving the compressor, the first turbine having a steam inlet, and a steam outlet containing a first steam effluent stream, a deethanizer that receives the compressor effluent stream, removes ethane, ethylene and lighter components in a top outlet, and removes C3+ components in a deeethanizer bottoms stream through a bottom outlet, a high pressure product splitter that receives the deethanizer bottoms stream as an inlet stream, removes a propylene stream through a top outlet, and removes a propane stream through a bottom outlet, the product splitter operating at a pressure of between about 200 psig and 375 psig, and a temperature of about 80° F. to 160° F., and a first splitter reboiler that reheats a first portion of the propane stream before the first portion is returned to the product splitter, the first splitter reboiler having a steam inlet that receives the first steam effluent stream from the first turbine as the first reboiler steam inlet stream.