Viscosity reduction processing at elevated pressure
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United States of America Patent
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Oct 18, 1988
Issued Date -
N/A
app pub date -
Jun 5, 1987
filing date -
Aug 30, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for improving the transportability of a hydrocarbon composition by passing an influent feed stream of composition into a downcomer to provide a hydrostatic column of fluid. The influent stream is heated by heat exchange with an effluent product stream wherein at least one of the streams is in turbulent flow. The feed stream is pressurized by the hydrostatic pressure head to a reaction pressure of at least about 1000 psi. The heated and pressurized feed stream is contacted with an active heat source in a reaction zone to increase the temperature of the feed stream to a reaction temperature of between about 300.degree. C. and the coking temperature of the hydrocarbon composition. The temperature differential between the active heat source and the feed stream in the reaction zone is maintained at less than about 30.degree. C. to provide a treated effluent stream which is brought into heat exchange contact with the influent stream. The treated composition has a lower viscosity than the feed composition.
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