Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1981-12-15
1983-09-06
Gluck, Irwin
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
71 28, 71 99, 71DIG4, 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
044028520
ABSTRACT:
Improved, liquid, urea-sulfuric acid reaction product compositions, noncorrosive to carbon 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 certain dialkylthioureas, in which the urea and sulfuric acid together constitute at least about 25 weight percent of the composition, the urea/sulfuric acid molar ratio of the composition is greater than 2 or less than 1, and a portion of the urea and sulfuric acid are present as monourea sulfate, diurea sulfate, or combinations thereof. The compositions can also contain corrosion inhibiting amounts of one or more cupric ion-containing compounds sufficient to reduce the corrosivity of the composition to stainless steel.
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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 and 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 and Sons, Inc., 1963.
D. F. du Toit, Verslag Akad. Wetenschappen, 22, 573-574 (abstracted in Chemical Abstracts, 8, 2346, 1914).
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, 549-553 (1934).
Sulfur Institute Bulletin No. 10 (1964), "Adding Plant Nutrient Sulfur to Fertilizer".
Gluck Irwin
Laird Michael H.
Sandford Dean
Union Oil Company of California
Wirzbicki Gregory F.
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