Distillation: processes – separatory – And recovering heat by indirect heat exchange – Utilizing recovered heat for heating the distillation zone
Patent
1995-06-29
1996-11-12
Manoharan, Virginia
Distillation: processes, separatory
And recovering heat by indirect heat exchange
Utilizing recovered heat for heating the distillation zone
203 27, 203 78, 203 80, 203DIG8, 203DIG9, 585805, 585910, B01D 300, C07C 704
Patent
active
055736459
ABSTRACT:
A distillation process and apparatus for recovering high purity aromatic products from a mixed aromatic hydrocarbon feedstock containing benzene, toluene and xylene by use of distillation towers integrated by heat exchange whereby substantial savings in operating costs and apparatus costs are realized. The distillation apparatus includes a benzene distillation tower and heat exchanger, a first toluene distillation tower and external heater, a second toluene distillation tower and heat exchanger and a xylene distillation tower and external heater, whereby the benzene distillation tower and heat exchanger are operably connected to the first toluene distillation tower and external heater and the second toluene distillation tower and heat exchanger are operably connected to the xylene distillation tower and external heater. A feature of the integrated method and apparatus is the utilization of the overhead fraction from the first toluene distillation tower as the source of reboil heat in the benzene distillation tower, and the utilization of the overhead fraction from the xylene distillation tower as the source of reboil heat in the second toluene distillation tower. Another feature of the integrated method and apparatus of the invention is the operation of the first toluene distillation tower at an elevated temperature and pressure and the operation of the second toluene distillation at a lower temperature and pressure.
REFERENCES:
patent: 2407820 (1946-09-01), Durrum
patent: 2425559 (1947-08-01), Passino et al.
patent: 2683761 (1954-07-01), McCaulay et al.
patent: 2725413 (1955-11-01), McCaulay et al.
patent: 2922827 (1960-01-01), Saffer et al.
patent: 3445537 (1969-05-01), Luther et al.
patent: 3597490 (1971-08-01), Otani et al.
patent: 3639497 (1972-02-01), Martel et al.
patent: 3789077 (1974-01-01), Kosseim et al.
patent: 3808284 (1974-04-01), Wallace et al.
patent: 3812197 (1974-05-01), Suggitt et al.
patent: 4041091 (1977-08-01), Henry
patent: 4052476 (1977-10-01), Morrison
patent: 4097543 (1978-06-01), Haag et al.
patent: 4117026 (1978-09-01), Haag et al.
patent: 4555311 (1985-11-01), Ward
patent: 4586986 (1986-05-01), Preusser et al.
patent: 4615769 (1986-10-01), Horigome et al.
patent: 4851604 (1989-07-01), Absil et al.
patent: 5173461 (1992-12-01), Absil et al.
patent: 5243117 (1993-09-01), Chang et al.
Bleeker Ronald A.
Keen Malcolm D.
Manoharan Virginia
Mobil Oil Corporation
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