Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By plural serial diverse separations
Reexamination Certificate
2008-06-27
2010-11-30
Nguyen, Tam M (Department: 1797)
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By plural serial diverse separations
C585S802000, C062S620000
Reexamination Certificate
active
07842847
ABSTRACT:
Improved processes for the separation of olefins from paraffins, such as propylene from propane are provided. Two product splitters are used in parallel to separate propylene from propane. One of the product splitters operates at a lower pressure, while the second product splitter operates at a higher pressure. The use of the two splitters in parallel provides a process for recovery of a high purity propylene product with lower energy consumption compared to prior art processes.
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U.S Department of Energy; Industrial Technologies Program, Industrial Heat Pumps for Steam and Fuel Savings [Online], Jun. 1, 2003, pp. 1-17, 17 pages.
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U.S. Department of Energy: Industrial Technologies Program, “Industrial Heat Pumps for Steam and Fuel Savings”[online], Jun. 1, 2003, from http://www1.eere.energy.gov/industry/bestpractices/pdfs/heatpump.pdf; p. 4, para. 4, 2 pages.
Mauhar et al. “Optimization of Propylene—Propane Distillation Process,” Chemical Papers, 2004, vol. 58, No. 6, pp. 386-390, 4 pages.
Panditrao Sunil
Ram Sanjeev
Lummus Technology Inc.
Nguyen Tam M
Osha • Liang LLP
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