Energy-saving distillative separation using low-temperature heat

Details Energy-saving distillative separation using low-temperature heat Energy-saving distillative separation using low-temperature heat

1982-11-01

1984-04-24

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 28, 203 24, 203 26, 203DIG4, B01D 340

Patent

active

044445768

ABSTRACT:
A method for the distillative separation of a feed stream containing light hydrocarbons and acid gas components in a distillative column into an enriched overhead product, such as a carbondioxide fraction, and an enriched bottom product of C.sub.2 + and hydrogen sulfide, the method which comprises: introducing a liquid alkane additive into the column, to provide a relatively uniform, constant temperature zone in the column above the point of feed inlet of the feed stream; extracting heat from the upper portion of the low-temperature zone; and introducing heat into the lower portion of the temperature zone approximately at or above the feed inlet of the feed stream, to reduce the energy requirement of the distillation.

REFERENCES:
patent: 2127004 (1938-08-01), Nelson

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