wet process used for industrial phosphoric acid production where rock phosphate and sulfuric acid is used for the manufacturing. In this document deta...
Description : wet process used for industrial phosphoric acid production where rock phosphate and sulfuric acid is used for the manufacturing. In this document detail study of fertilizer grade phosphoric acid pr...
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Description : Phosphoric Acid Summary
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“Manufacturing of Phosphoric Acid using Rock Phosphate and Sulfuric Acid”
v.
SEPARATION TECHNIQUE: a. EVAPORATION UNIT: i.
The product acid from storage tank is pumped to vacuum evaporator which is associated with catch all separator on top
ii.
Here the actual separation of phosphoric acid & hydrogen fluorine takes place
iii.
The phosphoric acid is separated from bottom ,HF gasses are obtained from top which reacts with SiO 2 to produce silicon tetrafluoride SiF4
iv.
These fumes then passed to next unit
b. FUMES SCRUBBING UNIT: i.
The fumes of SiO 4 so obtained is scrubbed here with the help of make-up water which is carries from the condensate tank
ii.
In the scrubbing process SiO 4 reacts with water to form H 2SiF6, Hydrofluosilisic acid
c. BAROMETRIC CONDENSOR UNIT: i.
Fumes of hydrofluosilisic acid are condensed & pumped to storage tank.
vi.
Material of Construction: The H 2SiF6 acid storage tank is made up of carbon steel with inner of the tank is rubber lined
vii.
From here it taken up for transportation to desired destination
2. URANIUM EXTRACTION FROM WET PROCESS PHOSPHORIC ACID: (LIQUID MEMBRANE APPROCH)
i.
Uranium occurrence is usually less therefore extraction of uranium is done from WPPA(Wet Process Phosphoric Acid)
ii.
Earlier it was done by solvent extraction process. In 1970’s research on liquid membrane approach for separation of uranium from wet process phosphoric acid was initiated at exxon research &Engg. co.
