Chemistry of hydrocarbon compounds – Purification – separation – or recovery
Patent
1993-05-05
1995-05-09
McFarlane, Anthony
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
62 11, C07C 700, F25J 300
Patent
active
054141885
ABSTRACT:
C.sub.4 hydrocarbons are separated from a gaseous mixture containing the same and lower hydrocarbons and hydrogen, by cooling such a gaseous mixture (45) to a temperature between -60.degree. F. and +32.degree. F. until a portion of the C.sub.4 hydrocarbons is condensed. The mixture of gas and liquid C.sub.4 hydrocarbons thus produced is phase separated in a first phase separation (53), and the liquid from this first phase separation is withdrawn as C.sub.4 hydrocarbons product (69). Gas from the first phase separation (53) is further cooled(47) until substantially all of the remaining C.sub.4 hydrocarbons are condensed but not the hydrogen. The latter material is subjected to a second phase separation (75), and liquid from the second phase separation (77) is withdrawn as liquid C.sub.4 hydrocarbons product (69). Vapor from the second phase separation (75) is withdrawn and expanded isentropically in a first expansion engine (81) to produce a mixture of liquid and vapor, which is subjected to a third phase separation (85), and liquid from the third phase separation (85) is withdrawn as liquid C.sub.4 hydrocarbons product (69). A portion of vapor separated in the third phase separation (85) is expanded isentropically in a second expansion engine (137), and refrigeration from vapor from the second expansion engine (137) is recovered by indirect heat exchange (47) with the first-mentioned mixture (45). Gas separated in the third separation (85) is cooled to produce a mixture of gas and liquid, which is phase separated (103 or 123). Gas from the latter phase separation is expanded isentropically in the second expansion engine (137), and refrigeration from material from second expansion engine (137) is also recovered by indirect heat exchange (99) with gas separated in the third phase separation (85).
REFERENCES:
patent: 4773968 (1988-09-01), O'Connell et al.
patent: 4832830 (1989-05-01), Howard
patent: 5026952 (1991-06-01), Bauer
Dupuis Gerard
Ha Bao
Kong Paul
McFarlane Anthony
Phan Nhat D.
LandOfFree
Method and apparatus for the separation of C.sub.4 hydrocarbons does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for the separation of C.sub.4 hydrocarbons , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for the separation of C.sub.4 hydrocarbons will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1707243