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Vaporization, Distillation, Condensation, Sublimation, And Cold Traps
(AREA)
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.Application to the manufacture of superphosphoric acid having a concentration close to 70%.
JO19841300A1984-09-121984-09-12improved process for manufacture of superphosphoric acid
JO1300B1
(en)