03933575 is referenced by 9 patents and cites 17 patents.

In the processing of a corrosive liquid mixture, such as 50 to 80% aqueous sulfuric acid, by its passage over one surface of a wall of inert heat resistant material, and heating the other surface of said wall, thereby to evaporate from said corrosive liquid mixture the more volatile component thereof, the improvement which comprises heating said wall by contact with an inert liquid material, and heating said inert liquid material indirectly through heat exchange with a normally solid molten material. Desirably the wall of inert material is a pipe surrounded by a molten metal in a first annular jacket and a molten salt in a second annular jacket.

Title
Separation of corrosive liquid mixtures
Application Number
5/442937
Publication Number
3933575
Application Date
February 15, 1974
Publication Date
January 20, 1976
Inventor
Hans L Kuhnlein
Fullinsdorf
CH
Hermann Wieschen
Cologne
DT
Klaus Kleine Weischede
Leverkusen
DT
Hans Joachim Kaiser
Leverkusen
DT
Hans Guth
Berg. Neukirchen
DT
Agent
Burgess Dinklage & Sprung
Assignee
Bayer Aktiengesellschaft
DT
HCH Bertrams Aktiengesellschaft
CH
IPC
B41D 3/00
C01B 17/90
B01D 1/00
B01D 1/22
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