Separation of ethylene-containing hydrocarbon mixtures by low te

Details Separation of ethylene-containing hydrocarbon mixtures by low te Separation of ethylene-containing hydrocarbon mixtures by low te

1978-08-07

1980-08-19

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 40, 62 31, F25J 302

Patent

active

042182298

ABSTRACT:
In a low temperature rectification process for the separation of ethylene from a mixture of ethylene and ethane comprising separating the ethylene-containing mixture into a liquid reboiler fraction enriched in ethane and a gaseous head fraction enriched in ethylene; heating and compressing the head fraction; partially liquefying resultant compressed gaseous head fraction in indirect heat exchange with the reboiler fraction; expanding and recycling resultant condensed head fraction in part as reflux to the rectification; and withdrawing in part resultant condensed fraction as product ethylene, the improvement which comprises heating the liquid reboiler fraction, in part, in indirect heat exchange with a closed refrigerantion cycle, e.g., an ethylene cycle.

REFERENCES:
patent: 2567461 (1951-09-01), Aicher
patent: 2600110 (1952-06-01), Hachmuth
patent: 3509728 (1970-05-01), Mercer et al.

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