Evaporation apparatus of special material

Details Evaporation apparatus of special material Evaporation apparatus of special material

1973-11-29

1976-02-10

Sofer, Jack

Concentrating evaporators

Closed evaporating chambers

Indirectly heated

159 27R, 159 28R, 159DIG15, 75125, 75128N, B01D 100, B01D 106, C22C 3816

Patent

active

039376460

ABSTRACT:
An evaporation apparatus for use in the evaporation, concentration, and/or purification of solutions containing alkali metal hydroxides and alkali metal chlorides, which apparatus has a liquid receiving chamber for the solutions being processed, a flow-through heating zone containing heat transfer elements, a separation chamber for forming a liquid-vapor mixture of the solution being processed, passageways connecting said chambers and said zones, and baffle and distribution means positioned within said chambers, zones and/or passageways, the improvement which comprises forming at least a portion of those surfaces of the said heat transfer elements, chambers, zones, passageways, baffle and distribution means of said apparatus which are in contact with the solution of said alkali metal hydroxide and said alkali metal chloride at temperatures in excess of about 50.degree. C of a ferritic stainless steel having the following composition:

REFERENCES:
patent: 1735980 (1929-11-01), Sadtler
patent: 1883211 (1932-10-01), Wilson
patent: 2562495 (1951-07-01), Holme
patent: 2689177 (1954-09-01), Batham et al.
patent: 2698779 (1955-01-01), Adams et al.
patent: 2709132 (1955-05-01), Giles
patent: 2942657 (1960-06-01), Kleinschmidt
patent: 3362813 (1968-01-01), Ziolkowski
patent: 3645722 (1972-02-01), Aulenbach
patent: 3717455 (1973-02-01), Hede et al.
patent: 3778255 (1973-12-01), Ototani et al.

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