Ammonia → Ammonium phosphate, tribasic

HRID 1260121Notes

Reaction equation

HRID 1260121 reaction equation
[S:1](=[O:5])(=[O:4])([OH:3])[OH:2].[P:6](=[O:10])([OH:9])([OH:8])[OH:7].[NH3:11]>>[P:6]([O-:10])([O-:9])([O-:8])=[O:7].[NH4+:11].[NH4+:11].[NH4+:11].[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[NH4+:11].[NH4+:11]

Participants

5

Reactant 3

HCID 222Ammonia3×HCID 1004Phosphoric AcidHCID 1118Sulfuric Acid

Product 2

HCID 159282Ammonium phosphate, tribasicHCID 6097028Ammonium Sulfate

Procedure

The output of pugmill #1 was a conditioned, warm, blended thixotropic homogeneous mix. Its odor had been reduced drastically at this point in the process. The conditioned biosolids mix exited pugmill #1 at just over 9500 pounds per hour and entered one of three stainless steel Pressure Vessels. While the biosolids were reacted in pugmill #1, a second and independent chemical synthesis was taking place in a different vessel. Enough concentrated sulfuric acid at 94% was added to a reactor vessel along with concentrated phosphoric acid (54% P or agricultural grade) in amounts which resulted in a slight excess of acid following the complete addition of the base, aqueous ammonia. The reaction was set up so the exiting pH of the completed fertilizer mix was close to pH 5.7. Simultaneous to the input of the two acids, aqueous ammonia at 21% N was also pumped into this chamber. The concentrated acids reacted with the aqueous ammonia to form ammonium salts of ammonium phosphate and ammonium sulfate.

Workup

  1. temperaturewarm
  2. additionThe conditioned biosolids mix
  3. customWhile the biosolids were reacted in pugmill #1
  4. customa second and independent chemical synthesis
  5. customresulted in a slight excess of acid
  6. additionmix
  7. customwas close to pH 5.7

Sources & evidence

ORD record
ord-b80972d2dee6483781bb355258b4eae6
Source dataset
uspto-grants-2013_06
Patent number
US08470065B1

Reaction notes

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