Sectioned bubble tray distillation over a wide range of feed com

Details Sectioned bubble tray distillation over a wide range of feed com Sectioned bubble tray distillation over a wide range of feed com

1982-06-07

1986-03-25

Bascomb, Wilbur

Distillation: processes, separatory

Miscellaneous separatory

202158, 261114A, B01D 320

Patent

active

045781532

ABSTRACT:
A volatile component over a wide range of concentrations in a multicomponent feed to a distillation column is accommodated at varying feed flow rates without destroying bubble tray efficiency. This is effected by establishing on a bubble tray a plurality of separation zones having discrete and different liquid pressure seals above bubble apertures on the tray. To avoid entrainment, vapor flow restrictors are utilized with bubble apertures in at least one separation zone having less liquid head to offset a tendency of proportionately increased vapor flow through such a bubble aperture during operation of separation zones having a liquid head differential. Intermediate weirs or bubble apertures having different elevations below a liquid level on the tray can be used to establish such separation zones of differing liquid heads.

REFERENCES:
patent: 1848462 (1932-03-01), Corbett
patent: 2085522 (1937-06-01), Baars
patent: 2197199 (1940-04-01), Welch
patent: 2692128 (1954-10-01), Bowles
patent: 2965548 (1960-12-01), Hachmuth
patent: 3151042 (1964-09-01), Koshoot
patent: 3151046 (1964-09-01), Larson
patent: 3712595 (1973-01-01), Hirsch
patent: 4102659 (1978-07-01), Martin
patent: 4247368 (1981-01-01), Bannon et al.
Bolles, "Optimum Bubble-Cap Tray Design", Mar. '56, published in Petroleum Process., pp. 82-95.

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