Back to results
US 4,073,634 AGranted
Process for production of fertilizers
OwnerLadislav J. Pircon, Ralph E. Peckinventors
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerLadislav J. Pircon, Ralph E. Peckinventors
Estimating the term…
A process for the production of fertilizer comprising reacting sulfur oxide containing gas and water in a multiple state reactor to form sulfur containing acid, reacting the sulfur containing acid with a basic ion selected from the group consisting of calcium, ammonium and potassium ions, the calcium being derived from a salt selected from the group consisting of phosphatic and nitrogeneous salts, to form a fertilizer selected from the group consisting of phosphatic, nitrogeneous and potassium fertilizers and combinations thereof. This process is suitable for the utilization of sulfur oxides resulting from the combustion of high sulfur containing fossil fuels and sulfur producing chemical processes. The process of this invention enables the utilization of low concentration sulfur acid in the acidification of phosphate rock utilizing a multiple state reactor.
A process for the production of fertilizer and removal of sulfur oxides from stack gases comprising reacting sulfur oxide containing gas and water at a pH of 3 to 8 in a multiple state reactor to form sulfur containing acid, maintaining the pH of solution of said sulfur containing acid at 3 to 8 with a basic ion selected from the group consisting of calcium, ammonium and potassium ions, said calcium being derived from a salt selected from the group consisting of phosphatic and nitrogeneous salts to form a fertilizer selected from the group consisting of phosphatic, nitrogeneous and potassium fertilizers and combinations thereof, said basic ion being rendered water soluble by reaction with said sulfur containing acid at a pH of 2.5 to 4 and the solution increased to a pH of from 3 to 8 so as to facilitate the reaction of the sulfur oxide.
Dependencies are inferred from the claim text.