Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1981-12-15
1983-09-13
Gluck, Irwin
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
71 28, 71DIG4, 71 99, 106 1415, 106 1421, 106 1433, 252387, 252389R, 422 12, 422 16, 564 3, 564 17, 564 68, C05C 900, C23F 1116, C23F 1118
Patent
active
044041160
ABSTRACT:
Improved liquid, urea-sulfuric acid compositions noncorrosive to stainless steel contain about 5 to about 75 weight percent urea, about 5 to about 85 weight percent sulfuric acid, 0 to about 75 weight percent water and a corrosion inhibiting amount of a cupric ion-containing compound, in which the urea and sulfuric acid together comprise at least about 25 weight percent of the composition, and in which at least a portion of the urea and sulfuric acid are present as monourea sulfate, diurea sulfate or combinations thereof. The compositions may also contain amounts of selected dialkylthioureas sufficient to reduce their corrosivity to carbon steel.
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L. H. Dalman, "Ternary Systems of Urea and Acids. I. Urea, Nitric Acid and Water. II. Urea, Sulfuric Acid and Water. III. Urea, Oxalic Acid and Water."; JACS, 56, 549-53 (1934).
Sulfur Institute Bulletin No. 10 (1964), "Adding Plant Nutrient Sulfur to Fertilizer".
I. N. Putilova, et al., "Metallic Corrosion Inhibitors," Pergamon Press 1960, pp. 76-80.
Herbert H. Uhlig, PH.D. "The Corrosion Handbook" sponsored by The Electrochemical Society, Inc., John Wiley & Sons, Inc. 1948, pp. 910-912.
L. L. Shreir, "Corrosion", vols. 1 and 2, pp. 3.55-3.58, 18.9-18.11, 18.16-18.19, 18.41-18.43, John Wiley & Sons, Inc. 1963.
Gluck Irwin
Laird Michael H.
Sandford Dean
Union Oil Company of California
Wirzicki Gregory F.
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