Distillation: processes – separatory – And recovering heat by indirect heat exchange – Utilizing recovered heat for heating the distillation zone
Patent
1982-11-24
1985-06-25
Sever, Frank
Distillation: processes, separatory
And recovering heat by indirect heat exchange
Utilizing recovered heat for heating the distillation zone
159 242, B01D 302
Patent
active
045252440
ABSTRACT:
This invention relates to distillation in pressurized columns and provides a process for reboiling such columns. The column 1 working at a pressure of 11 bar is fed with a mixture of hydrocarbons preheated in exchangers 2a and 2b to about 130.degree. C. A part of the bottom is withdrawn, then expanded by means of an expansion valve 5 to 2.5 bar in an expansion balloon flask 6 where the phases are separated. The vapor phase is compressed in a compressor 7 to the pressure of the column and reinjected at the bottom of the column, whereas the liquid phase is removed.
With the process, energy can be saved in pressurized distillation columns, for example in petrol stabilization columns.
REFERENCES:
patent: 2315843 (1943-04-01), Drennan et al.
Electricite et Economies d'Energie, vol. 89, No. 3, Mar. '80, L. Muller, pp. 219-224.
Gourlia Jean-Paul
Jacob Philippe
Jamen Robert
ELF France
Sever Frank
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