Ecolab USA Inc.

Nalco Company

Phillip E Bureman

Craig W Myers

John E Hoots

Donald A Johnson

Steven R Hatch

Disclosed is a method of monitoring and optimizing the concentration of an additive composition in a fuel ethanol. The method includes adding a known amount of the additive composition to the fuel ethanol to create a treated fuel ethanol. A measured fluorescent signal provides information for determining the concentration of the additive composition in the fuel ethanol. A component in the additive composition is capable of providing the fluorescent signal or capable of being chemically derivatized to provide a fluorescent signal or a colorimetric signal. Based upon the measured fluorescent signal or colorimetric signal, the concentration of the additive composition in the fuel ethanol may be adjusted.

Method of monitoring and optimizing additive concentration in fuel ethanol

A trace amount of a tungstate added together with an ortho-phosphate and/or phosphonite is disclosed for inhibiting corrosion by a nitrogen fertilizer solution. In particular, an ammonium nitrate fertilizer solution is in contact with ferrous metal storage tanks, piping, and equipment surfaces. Tungstate added with an iron stabilizer including a dispersant polymer is also effective for inhibiting corrosion.

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Olathe, KS, United States of America

Phillip E Bureman