Refrigeration – Processes – Circulating external gas
Patent
1980-09-12
1982-06-22
Yudkoff, Norman
Refrigeration
Processes
Circulating external gas
62 31, 62 24, F25J 302
Patent
active
043360467
ABSTRACT:
Apparatus and process for an energy saving system for the fractionation of a C.sub.4 stream containing predominately n-butane and isobutane using an open heat pump cycle in which the n-butane bottoms from the fractionation are the compressing medium and isobutane overhead is used to vaporize the n-butane by indirect heat exchange. A problem which would be expected to prevent this system is the unusual characteristic of n-butane (also isobutane) that on compression a liquid-vapor phase results, which is damaging to the compressor. This is overcome by passing the vaporized n-butane prior to compression, through an apparatus that removes any entrained liquids and heats the vapors to a temperature sufficient to prevent the formation of the liquid phase under compression. It has been found that this process results in the use of only about 9% of the outside energy previously used in conventional operation for a specific unit.
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Dixon Dennie W.
Nepute Carl
Nye James O.
Schorre Kenneth R.
Johnson Kenneth H.
Nye Engineering, Incorporated
Tenneco Oil Company
Yudkoff Norman
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