Refrigeration – Processes – Circulating external gas
Patent
1992-05-19
1993-07-27
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 24, F25J 302
Patent
active
052302172
ABSTRACT:
This invention relates to an improvement in a process for the separation of a multi-component stream comprising component A, B and C with A being the most volatile and C the least volatile. A multi-component feed is introduced to a multicolumn distillation system comprising a first or main distillation column and a side column wherein at least a light component A is separated from a heavier component C in the main distillation column, the lighter component A being removed as an overhead fraction and the heavier component C being removed as a bottoms fraction. The improvement for enhanced recovery of component B in the side column comprises withdrawing a liquid fraction from the main distillation column at a point intermediate the overhead and feed and introducing that liquid fraction to an upper portion of the side column. Lighter components are withdrawn as an overhead from the side column and returned to an optimal location in the distillation system, typically the main distillation column. A vapor fraction is also withdrawn from the main distillation column at a point intermediate the bottoms and feed and vapor fraction is introduced to a lower portion of the side column. A liquid fraction is withdrawn as bottoms and returned to the main distillation column. Thermal integration in the side column is effected by removing a portion of the liquid typically from the stripping section of the side column and vaporizing this fraction against a vapor fraction obtained from the main distillation column.
REFERENCES:
patent: 4025398 (1977-05-01), Haselden
patent: 4234391 (1980-11-01), Seader
patent: 4605247 (1986-08-01), Erickson
patent: 4747859 (1988-05-01), Gladman et al.
patent: 4762542 (1988-08-01), Mishkovsky et al.
patent: 4883517 (1989-11-01), Rathbone
patent: 5019145 (1991-05-01), Rohde et al.
patent: 5076823 (1991-12-01), Hansel et al.
patent: 5079923 (1992-01-01), Grenier
patent: 5100447 (1992-03-01), Krishnamurthy et al.
Lynd, L. R., H. E. Grethlein, "Distillation with Intermediate heat Pumps and Optimal Side Stream Return" AICHE Journal Aug. 1986, vol. 32, No. 8, pp. 1347-1359.
Linnhoff, Bodo, Helen Dunford, Robin Smith, "Heat integration of Distillation Columns Into Overall Processes" Chemical Engineering Science vol. 36, No. 8 pp. 1175-1188 1983.
Fidkowski, Zbigniew; Lechosian Krolikowski "Minimum Energy Requirements of Thermally Coupled Distillation Systems" AIChe Journal, Apr. 1987, vol. 33, No. 4, pp. 643-653.
Agrawal Rakesh
Woodward Donald W.
Air Products and Chemicals Inc.
Brewer Russell L.
Capossela Ronald C.
Marsh William F.
Simmons James C.
LandOfFree
Inter-column heat integration for multi-column distillation syst does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Inter-column heat integration for multi-column distillation syst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inter-column heat integration for multi-column distillation syst will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2336833