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US 5,174,957 AGranted
Emulsion minimizing corrosion inhibitor for naphtah/water systems
AssigneeBetz Laboratories, Inc.
InventorT. Miles McCullough
Life of this patent
Estimating the term…
Abstract
A corrosion inhibitor formulation for oil and water systems which formulation is resistant to sludge formation and does not tend to stabilize oil/water emulsions when added to oil and water systems. The corrosion inhibitor includes an imidazoline dissolved in an aromatic solvent, a 2-hydroxyalkylcarboxylic acid such as glycolic acid and a glycol such as hexylene glycol. The imidazoline is preferably prepared from a long chain fatty acid and a polyamine in a molar ratio of about 1.5:1.
Claims11
A method of inhibiting imidazoline induced emulsion stabilization in an oil and water system comprising adding a formulation comprising:
- (a) an imidazoline dissolved in a hydrocarbon solvent;
- (b) an effective amount of a 2-hydroxyalkylcarboxylic acid having the formula to inhibit imidozoline induced emulsion stabilization ##STR3## where R is H or an alkyl group of from 1 to 6 carbon atoms;
- and (c) a glycol having the formula ##STR4## where R', R" and R'" are independently, hydrogen or an alkyl group of from 1 to 4 carbon atoms, X is an integer from 0 to 4 and wherein when X=0, R' R", and R'" are not all hydrogen, with said glycol having at least 4 carbon atoms.
Dependencies are inferred from the claim text.