Method and apparatus for the distillation purification of organi

Details Method and apparatus for the distillation purification of organi Method and apparatus for the distillation purification of organi

1977-02-25

1979-02-13

Bernstein, Hiram H.

Distillation: apparatus

Apparatus

Systems

202234, B01D 342

Patent

active

041394186

ABSTRACT:
An electrically heated still or purifier for the distillation purification of heat transfer fluids such as diphenyl, diphenyl ether and mixtures thereof which are contaminated with high boiling thermal decomposition products. The design incorporates an internal draft tube to induce natural circulation of the boiling liquid and thereby enhance heat transfer coefficients. The purifier is especially adapted for operation with Dowtherm A at temperatures of 700.degree.-750.degree. F. for removal of thermal decomposition products and corresponding superatmospheric pressures for Dowtherm A containing low boiling contaminants or other low boiling organic fluids without danger of overheating the heat transfer fluid.

REFERENCES:
patent: RE28524 (1975-08-01), Brebant
patent: 2407616 (1946-09-01), Phelps et al.
patent: 2556186 (1951-06-01), Hegenbarth
patent: 3575815 (1971-04-01), Seih
patent: 3697384 (1972-10-01), Walker
patent: 3717748 (1973-02-01), Imler

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