Process of strengthening dilute phosphoric acid

Details Process of strengthening dilute phosphoric acid Process of strengthening dilute phosphoric acid

1979-05-22

1981-06-30

Yudkoff, Norman

Concentrating evaporators

Processes

Involving waste liquid

159 24A, 159DIG16, 159DIG8, 423321R, 423531, B01D 128

Patent

active

042761166

ABSTRACT:
A process for the concentration of dilute phosphoric acid in a phosphoric acid process characterized by a plurality of separate phosphoric acid cycles when the phosphoric acid is concentrated in each cycle by a vacuum evaporation is described wherein the phosphoric acid cycles is heated by indirect heat exchange by heat of formation formed in a sulfuric acid contact process.

REFERENCES:
patent: 3203875 (1965-08-01), Sturtevant
patent: 3362457 (1968-01-01), Chirico
patent: 3620673 (1968-03-01), Browder, Jr.
patent: 3675707 (1972-07-01), Andersson et al.
patent: 4010246 (1977-03-01), Steinrotter et al.
Phosphoric Acid, A. V. Slack, vol. 1, Part II, pp. 607-634, 1968, Marcel Dekker, Inc., publishers.

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