Back to results
US 4,734,259 AGranted
Mixtures of .alpha.,.beta.-unsaturated aldehides and surface active agents used as corrosion inhibitors in aqueous fluids
AssigneeDowell Schlumberger Incorporated
InventorsWayne W. Frenier, Frederick B. Growcock
Life of this patent
Estimating the term…
Abstract
A composition and method for inhibiting the attack of aqueous corrosive fluids on metal by contacting the metal with a composition including an .alpha.,.beta.-unsaturated aldehyde and a surfactant.
Claims30
A composition for inhibiting the attack of aqueous corrosive fluids on ferrous metal which consists essentially of:
- (A) an .alpha.,.beta.-unsaturated aldehyde having the general formula:
- ##STR2## wherein:
- R.sub.1 represents a saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se,
- R.sub.2 represents hydrogen, a saturated or unsaturated aliphatic hydrocarbon group containing from 1 to about 5 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from 1 to about 5 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se, and
- R.sub.3 represents hydrogen, a saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se, with the total number of carbon atoms in substituents represented by R.sub.1, R.sub.2 and R.sub.3 ranging from 1 to about 16, and
- (B) a surfactant.
3 more elements
A method for inhibiting the attack of aqueous corrosive fluids on ferrous metal which comprises contacting said ferrous metal with a composition consisting essentially of:
- (A) an .alpha.,.beta.-unsaturated aldehyde having the general formula:
- ##STR3## wherein:
- R.sub.1 represents a saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se,
- R.sub.2 represents hydrogen, a saturated or unsaturated aliphatic hydrocarbon group containing from 1 to about 5 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from 1 to about 5 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se, and
- R.sub.3 represents hydrogen, a saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se, with the total number of carbon atoms in substituents represented by R.sub.1, R.sub.2 and R.sub.3 ranging from 1 to about 16, and
- (B) a surfactant.
3 more elements
A method for inhibiting the attack of aqueous corrosive fluids on ferrous metal which comprises contacting said ferrous metal with a mixture of at least one aqueous corrosive fluid and a composition consisting essentially of:
- (A) an .alpha.,.beta.-unsaturated aldehyde having the general formula:
- ##STR4## wherein:
- R.sub.1 represents a saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se,
- R.sub.2 represents hydrogen, a saturated or unsaturated aliphatic hydrocarbon group containing from 1 to about 5 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from 1 to about 5 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se, and
- R.sub.3 represents hydrogen, a saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms, a substituted saturated or unsaturated aliphatic hydrocarbon group containing from about 3 to about 12 carbon atoms and also containing one or more non-interfering substituents, an aryl group, a substituted aryl group containing one or more non-interfering substituents, or a non-interfering substituent per se, with the total number of carbon atoms in substituents represented by R.sub.1, R.sub.2 and R.sub.3 ranging from 1 to about 16, and
- (B) a surfactant.
3 more elements
Dependencies are inferred from the claim text.