Title: Refrigerative fractionation of cracking-gases in ethylene production plants

Abstract: In a method for the refrigerative fractionation of cracking gases in ethylene production plants, the improvement consisting in that ethane is used as the refrigeration fluid, it being thus possible to attain very low temperatures, down to minus 88.degree. C.: concurrently, the condensation with water is practicable whenever water is available in large masses at a temperature which is in the range from zero centigrade to +25.degree. C.; that is the case of sea waters in cold countries or fresh waters in cold climate. A considerable first-cost and running economy become thus available.

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Inventors: Gazzi, Luigi (Milan, IT)
Sguera, Oronzo (San Donato Milanese, IT)

Application Number: 781064
Filing Date: 1977-03-24
Publication_date: 1979-08-07
Assignee: Snamprogetti S.p.A. (Milan, IT)
Primary Class(es): 62/622 62/630, 62/935
Other Classes:
US Patent Ref:

2731810	Jan, 1956	Hachmuth	62/28.
2775103	Dec, 1956	Koble et al.	62/28.
2823523	Feb, 1958	Eakin et al.	62/28.
2909905	Oct, 1959	Mitchell et al.	62/40.
2960838	Nov, 1960	Denton	62/39.
3073129	Jan, 1963	Grenier	62/28.
3367122	Feb, 1968	Tutton	62/28.
3433026	Mar, 1969	Swearingen	62/38.
3756036	Sep, 1973	Ezell	62/28.
3938934	May, 1960	Williams	62/28.

Other Refs:
Primary Examiner: Yudkoff, Norman
Assistant Examiner:
Attorney: Morgan, Finnegan, Pine, Foley & Lee