Refrigeration – Processes – Fractionally solidifying a constituent and separating the same
Patent
1993-10-26
1995-03-28
Capossela, Ronald C.
Refrigeration
Processes
Fractionally solidifying a constituent and separating the same
62500, 196 145, 208 37, B01D 904, C02F 122
Patent
active
054006180
ABSTRACT:
Batch auto-refrigerative dewaxing processes employing at least two batch chilling vessels can be improved by integrating the batch auto-refrigerative dewaxing chilling cycles of the chilling vessels so as to have their cycles of operation overlap and use thermocompressors to recover the energy of the hot, high pressure cycle stream of one vessel by operation on the cooler, low pressure cycle stream of the other vessel to increase the pressure of said low pressure cycle stream. The overlap operation of the multiple batch chillers integrated through the thermocompressor will also permit running the cool, low pressure cycle to a pressure even lower than atmospheric without inleakage of air because of the vacuum effect generated by the hot, higher pressure stream running through the thermocompressor. Autorefrigerative dewaxing employs liquified normally gaseous solvents as the chilling solvents such as C.sub.3 -C.sub.4 alkanes/alkenes e.g. propane, propylene, butane, butylene and mixtures thereof.
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Allocca Joseph J.
Capossela Ronald C.
Exxon Research & Engineering Co.
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