Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1996-01-22
1997-10-21
Capossela, Ronald C.
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62935, F25J 100
Patent
active
056784244
ABSTRACT:
The present invention is an improvement in the combined fractionation steps of deethanization and C2 splitting for ethylene and ethane separation. Theoretical stages are added to the rectification section of a deethanizer above a liquid or vapor sidedraw. Polymer grade ethylene product up comprising to 30 percent of the ethylene in the deethanizer feed is obtained in an overhead stream according to the present invention. Lesser recovery at the same ethylene purity or higher recovery at lower ethylene purity are obtained varying recovery or numbers of additional stages in the rectification. An overall reduction in total cold utilities for the overhead condensers for the deethanizer and downstream C2 splitter are obtained in practicing the present invention.
REFERENCES:
patent: 1735558 (1929-11-01), Youker
patent: 1954839 (1934-04-01), Youker
patent: 1957818 (1934-05-01), Carney
patent: 2327134 (1943-08-01), Schuftan
patent: 2327643 (1943-08-01), Houghland
patent: 3956415 (1976-05-01), Cummings et al.
patent: 4285708 (1981-08-01), Politte et al.
patent: 4430102 (1984-02-01), Tedder
patent: 4436540 (1984-03-01), Dowd et al.
patent: 4720293 (1988-01-01), Rowles et al.
patent: 4726826 (1988-02-01), Crawford et al.
patent: 4900347 (1990-02-01), McCue, Jr. et al.
patent: 5035732 (1991-07-01), McCue, Jr.
patent: 5235479 (1993-08-01), DiCintio et al.
"Ethylene from NGL Feedstocks-Part 3", K. Ng et al, Hydrocarbon Processing, Dec. 1983, pp. 99-103.
"Ethylene From NGL Feedstocks-Part 4", H. Kister et al Hydrocarbon Processing, Jan. 1984.
"Temperature-Heat Diagrams For Complex cols. 2. Underwood's Method For Side Strippers and Enrichers", N.A. Carlberg, Ind. Eng. Res, vol. 28, pp. 1379-1386, 1989.
Brown & Root, Inc.
Capossela Ronald C.
LandOfFree
Rectified reflux deethanizer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rectified reflux deethanizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rectified reflux deethanizer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-998248