Corrosion inhibitor for nitrogen fertilizer solutions

Details Corrosion inhibitor for nitrogen fertilizer solutions Corrosion inhibitor for nitrogen fertilizer solutions

1993-09-10

1994-12-27

Lander, Ferris

Chemistry: fertilizers

Processes and products

Organic material-containing

71DIG4, 423269, 25238954, C05C 100, C05C 900, C05C 1300

Patent

active

053761596

ABSTRACT:
A trace amount of a molybdate is disclosed for inhibiting corrosion by concentrated urea-ammonium nitrate fertilizer solutions (UAN) in contact with ferrous metal piping and equipment surfaces. From 10 to 200 ppm of sodium molybdate are blended in a UAN solution containing 20-50 weight percent water for effectively inhibiting corrosion. The corrosion-inhibited UAN solution is non-sludging, non-foaming and essentially free of precipitates.

REFERENCES:
patent: 3024100 (1962-03-01), Langguth et al.
patent: 3617240 (1971-11-01), Scott, Jr. et al.
Derwent Abstract 78-57487A, Takayaso, "Preventing . . . Molybdate to the Water", 1978.
Derwent Abstract 71-17057S, Allied, "Non-corrosive Fertilizer Solutions", 1967.
CA114 (1):5379n; Physicochemical study of a urea-ammonium nitrate solution containing trace elements; Kosyakov, N. E., Kolyada, M. S., Poyarkova, I. F., Sergienko, I. D.; USSR; 1990.
CA103(19):159722d; Liquid molybdenum-nitrogen fertilizers; Lubis, B., Sviklas, A., Padvaiskas, I.; USSR; 1985.
CA96(17):141787f; Stabilization of nitrogenous fertilizer solutions based on ammonium nitrate and urea; Plasil, Jiri, Kraft, Jaroslav; 1982.
CA92(23):197128b, Effect of microadditives on the physicochemical properties and corroding activity of liquid complex fertilizers based on polyphosphoric acid; Bugai, P. M., Slyn'ko, V. P., Akhtyrskaya, A. A., Makarov, V. A.; 1977.
CA90(11):85942q: Fertilizers solutions; Michaud, Horst, Rieder, Georg, Seeholzer, Joseph; 1978.
CA86(11):70783g; Development of liquid multicomponent fertilizers based on potassium and ammonium nitrates and diphosphates, urea, and water; Endovitskaya, M. R.; Vereshchagina, V. I., 1974.
CA78(12):78878x; Inhibition of steel-3 corrosion in a solution of a concentrated liquid fertilizer; Osipov, A. K.; USSR; 1971.

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