Nitrite based rust inhibitor complex

Details Nitrite based rust inhibitor complex Nitrite based rust inhibitor complex

C - Chemistry, Metallurgy

07

D

260/324, 260/354

C07D 207/26 (2006.01) C07D 307/06 (2006.01) C07D 319/12 (2006.01)

Patent

CA 1060028

A B S T R A C T An oil dispersible rust inhibitor consisting of a chemical complex of a metal nitrite with a hetero-atomic aprotic polar organic solvent. Preferred metal nitrites are the alkali, alkaline earth metals or nickel, zinc, or cadmium nitrites. Preferred solvents are dimethylsulfoxide, dimethyl- formamide, dibutylformamide, n-methylpyrrolidone, dioxane, ethylcarbonate, tetrahydrofuran and their derivatives. The complex is prepared by reacting a nitrite ion with a solution of a basically reacting metal salt in the selected solvent. The excess metal salt is removed from the solution after completion of the reaction. The complex is readily solubilized in oil through the use of common dispersants.

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