Effect of Impurities in Phosphoric Acid on the Granulometery of the Produced DAP(Di-ammonium Phosphate) in Petrochemical Plants

Bahman ZareNezhad

Korean Journal of Chemical Engineering, Vol.19, No.6, 928-931, November, 2002

Bahman ZareNezhad^†

Chemical Engineering Department, I.U.S.T, P.O.Box 15875-4786, Tehran, Iran

E-mail:

The influence of impurities in phosphoric acid on the granulometery of the produced DAP was experimentally investigated in a petrochemical plant. It was found that DAP granulometery can be substantially improved as the total concentration of aluminum and iron oxides in the phosphoric acid is increased up to 2.2±0.1 wt%. A correlation was proposed for predicting the DAP granulometery in terms of total concentrations percent of (Al2O3+Fe2O3) in the phosphoric acid.

Keywords:DAP;Granulometery;Aluminum Oxide;Iron Oxide;Phosphoric Acid

[References]

Adetayo A, Lister JD, Desai M, Chem. Eng. Sci., 48, 3951 (1993)
Arthur W, "Physical Chemistry of Surfaces," 5th Edition, Wiley, New York (1990)
Becker P, "Phosphates and Phosphoric Acid," Dekker Publishers, New York (1989)
Coulter Electronics Ltd., "Coulter Counter Operating Manual," England (1988)
Didier Engineering GmbH, "Start Up and Operation Manual of DAP Plant," Germany (1988)
Ennis BJ, Li J, Tardos GI, Pfeffer R, Chem. Eng. Sci., 45, 3071 (1990)
Jeffery GH, Basset J, Mendham J, Denney RC, "Vogel's Testbook of Quantitative Chemical Analysis," Fifth Edition, Longman Group, UK Ltd. (1989)
Handley MM, "Effects of Impurities on Production of DAP," Proceedings of the IFA Technical Conference, Paris, France (1984)
ZareNezhad B, "Increasing the DAP Production Capacity by Controlling the Level of Impurities," Technical Report, National Petrochemical Company, Tehran, Iran (2001)

[1] Adetayo A, Lister JD, Desai M, Chem. Eng. Sci., 48, 3951 (1993)

[2] Arthur W, "Physical Chemistry of Surfaces," 5th Edition, Wiley, New York (1990)

[3] Becker P, "Phosphates and Phosphoric Acid," Dekker Publishers, New York (1989)

[4] Coulter Electronics Ltd., "Coulter Counter Operating Manual," England (1988)

[5] Didier Engineering GmbH, "Start Up and Operation Manual of DAP Plant," Germany (1988)

[6] Ennis BJ, Li J, Tardos GI, Pfeffer R, Chem. Eng. Sci., 45, 3071 (1990)

[7] Jeffery GH, Basset J, Mendham J, Denney RC, "Vogel's Testbook of Quantitative Chemical Analysis," Fifth Edition, Longman Group, UK Ltd. (1989)

[8] Handley MM, "Effects of Impurities on Production of DAP," Proceedings of the IFA Technical Conference, Paris, France (1984)

[9] ZareNezhad B, "Increasing the DAP Production Capacity by Controlling the Level of Impurities," Technical Report, National Petrochemical Company, Tehran, Iran (2001)