Sulfuric Acid → Phosphoric Acid

HRID 1155272Notes

Reaction equation

HRID 1155272 reaction equation
[O:1]=[P:2]12[O:13][P:11]3([O:14][P:4]([O:6][P:7]([O:10]3)([O:9]1)=[O:8])(=[O:5])[O:3]2)=[O:12].OS(O)(=O)=O>O>[P:2](=[O:1])([OH:13])([OH:9])[OH:3].[O:5]=[P:4]12[O:3][P:2]3([O:9][P:7]([O:10][P:11]([O:13]3)([O:14]1)=[O:12])(=[O:8])[O:6]2)=[O:1]

Participants

5

Reactant 2

HCID 1118Sulfuric AcidHCID 14812Phosphorus oxide (P4O10)

Product 2

HCID 1004Phosphoric AcidHCID 14812Phosphorus oxide (P4O10)

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Method presented in this example is effected in an identical system as the method described in the second example the only differences being that to the filter cloth washing zone 6 there are supplied in parallel current water of a temperature of 65 degrees Centrigrade in the amount of 40 cu. m. per hour, together with sulphuric acid of a concentration of H2SO4 equal to 65 percent by weight in the amount of 8 cu. m. per hour. The solution R obtained in this zone containing 0.1 percent by weight of P2O5 and 15.4 percent by weight of H2SO4 is next used for washing the filter cake in the second washing zone 9, whereas to the last washing zone 4 clean water is supplied in the amount of 10 cu. m. per hour. Washings FP from the zones 4 and 9 are supplied to the first washing zone 10 whereas the obtained washing solution FP containing 24 percent by weight of P2O5 and 4.9 percent by weight of H2SO4 in the amount of 134 cu. m. per hour is introduced directly to the reactive system 1. Dillution of the sulphuric acid of 98 percent concentration of H2SO4 by weight in the amount of 17.3 cu. m. per hour supplied to the reactive system is obtained by adding water in the amount of 12 cu. m. per hour. In the filtration zone 11 there is obtained a wet phosphoric acid EKF of a concentration of P2O5 equal to 20.0 percent by weight in the amount of 29.4 cu. m. per hour. In the course of this process there is obtained, upon washing, phosphogypsum F of moisture content equal to 26 percent of H2O by weight in the amount of 103 tons per hour, containing 0.42 percent of P2O5 in a form non-soluble in water in terms of dry matter of this 0.28 percent of P2O5 by weight in a substitutive form, as well as 0.37 percent of P2O5 by weight in the form of a non-decomposed phosphoric raw material.

Workup

  1. washwashing zone 6 there
  2. customare supplied in parallel current water of a temperature of 65 degrees Centrigrade in the amount of 40 cu
  3. waitper hour
  4. waitper hour
  5. customThe solution R obtained in this zone
  6. washfor washing the filter cake in the second washing zone 9
  7. waitper hour
  8. washwashing solution FP
  9. additioncontaining 24 percent by weight of P2O5 and 4.9 percent by weight of H2SO4 in the amount of 134 cu
  10. additionper hour is introduced directly to the reactive system 1
  11. waitper hour supplied to the reactive system
  12. customis obtained
  13. waitper hour

Sources & evidence

ORD record
ord-452c3a43180148bbbb1a11b2c7bbdb8f
Source dataset
uspto-grants-1981_11
Patent number
US04301130

Reaction notes

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