Process and installation for concentrating dilute solutions of c

Concentrating evaporators – Film type – Moving film

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159 29, 159 49, 159 16A, 159DIG6, 159DIG15, 159DIG19, 23275, 23307, 423529, 423531, B01D 114, B01D 122, B01D 102, C01B 1790

Patent

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039705110

ABSTRACT:
Dilute solutions of corrosive products, such as sulphuric or phosphoric acid, are concentrated by pre-concentrating the dilute solution and then introducing the pre-concentrated solution into a tunnel in which it flows in a thin layer over successive cascades while being heated, preferably by indirect radiant heating. An installation for carrying out the process is also described.

REFERENCES:
patent: 339552 (1886-04-01), Hughes
patent: 548303 (1895-10-01), Dyson
patent: 573219 (1896-12-01), Haubtman
patent: 699011 (1902-04-01), Quinan
patent: 1263950 (1918-04-01), Slater
patent: 2486684 (1949-11-01), Schlesman et al.
patent: 2527410 (1950-10-01), Fleischer
patent: 2620573 (1952-12-01), McMahon
patent: 3221711 (1965-12-01), Beggs
patent: 3294650 (1966-12-01), Manteufel
patent: 3353920 (1967-11-01), Kitzen

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