Pressure responsive fractionation control

Details Pressure responsive fractionation control Pressure responsive fractionation control

1976-11-29

1978-01-24

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

203 2, 203 3, F25J 302

Patent

active

040701727

ABSTRACT:
In a fractionation system in which pressure fluctuations within the fractionation vessel can result in alteration of the fractionator product composition, fractionation column pressure is monitored and converted to a temperature requirement signal representative of the temperature required within a preselected portion of the fractionation column in order to provide the desired product constituent distribution. The heat input to the fractionation column is controlled in response to the temperature requirement signal, corrected as necessary by actual analysis of the product. In a preferred embodiment, control of a demethanizer column in a cryogenic natural gas liquids separation process can be practiced advantageously.

REFERENCES:
patent: 2917437 (1959-12-01), Kleiss et al.
patent: 2939293 (1960-06-01), Green
patent: 3342702 (1967-09-01), Rijnsdorp

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