Two-stage concentration for superphosphoric acid

Details Two-stage concentration for superphosphoric acid Two-stage concentration for superphosphoric acid

1984-08-06

1985-11-05

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423317, 423321R, 159 471, C01B 2516, B01D 100

Patent

active

045513198

ABSTRACT:
A process for the concentration of phosphoric acid by evaporation under vacuum in two stages to produce superphosphoric acid, the pressure inside the exchanger is kept equal to or greater than 0.35 bar higher than that in the evaporator vessel.

REFERENCES:
patent: 3298783 (1967-01-01), Gruber et al.
patent: 3314756 (1967-04-01), Myon
patent: 3440010 (1969-04-01), Rushton
patent: 3457036 (1969-07-01), Backlund
Rushton, W. E., Superphosphoric Acid by Vacuum Concentration, CHEMICAL ENGINEERING PROGRESS, vol. 64, No. 5, May 1968, pp. 68-70.

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