Dual distillation columns

Details Dual distillation columns Dual distillation columns

1984-10-09

1987-07-21

Bascomb, Wilbur

Distillation: apparatus

Apparatus

Systems

202158, 203 25, B01D 326

Patent

active

046816615

ABSTRACT:
Dual interrelated distillation columns are disclosed wherein the heat for a first column is transferred by thermal conduction through a common wall or surface to a second column to increase efficiency and decrease waste of energy. In one embodiment, the first heat generating column is a cylindrical column, and the second column is an annular column concentric to the first column. This concentric arrangement permits the heat generated in the first column to flow outwardly into the second column, thereby improving its efficiency and reducing the heat loss. Typically, the inner first column is a high pressure rectifying column, and the outer concentric column is a stripping column. In an alternate embodiment, the inner column can simply be a portion of a high pressure distillation process, and the outer column is a portion of a lower pressure distillation column. In alternate embodiments, the rectifying apparatus can assume a variety of shapes such as a plurality of packed tubes which extend through the stripping column or a corrugated configuration or rectangular configuration as desired.

REFERENCES:
patent: 1086452 (1914-02-01), Golodetz
patent: 1257470 (1918-02-01), Filippo et al.
patent: 2070100 (1937-02-01), Twomey
patent: 3189531 (1965-06-01), Hack et al.
patent: 3412016 (1968-11-01), Graven
patent: 3844898 (1974-10-01), DeGraff
patent: 3959085 (1976-05-01), DeGraff
patent: 4025398 (1977-05-01), Haselden
patent: 4234391 (1980-11-01), Seader

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