04402852 is referenced by 54 patents and cites 7 patents.

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.

Title
Noncorrosive urea-sulfuric acid compositions
Application Number
6/331001
Publication Number
4402852
Application Date
December 15, 1981
Publication Date
September 6, 1983
Inventor
Donald C Young
Fullerton
CA, US
Agent
Michael H Laird
Gregory F Wirzbicki
Dean Sandford
Assignee
Union Oil Company of California
CA, US
IPC
C23F 11/18
C23F 11/16
C05C 9/00
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