The polyamine

Claim 1

A PROCESS FOR INHIBITING CORROSION OF FERROUS METALS BY CONTACT WITH A CORROSIVE MATERIAL SELECTED FROM THE CLASS CONSISTING OF HYDROCARBON FLUIDS, WATER, BRINES, WEAK INORGANIC ACIDS, ORGANIC ACIDS, CARBON DIOXIDE, HYDROGEN SULFIDE, COMBINATIONS OF THESE MATERIALS WITH EACH OTHER, COMBINATIONS OF EACH OF THESE MATERIALS WITH OXYGEN, AND COMBINATIONS OF THESE MATERIALS WITH EACH OTHER AND OXYGEN, WHICH INCLUDES TREATING SUCH FERROUS METALS WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF: (1) ACYLATED, (2) OXYALKYLATED, (3) ACYLATED THEN OXYALKYLATED, (4) OXYALKYLATED THEN ACYLATED, (5) ACYLATED, THEN OXYALKYLATED AND THEN ACYLATED, MONOMERIC POLYAMINOMETHYL PHENOLS CHARACTERIZED BY REACTING A PREFORMED METHYLOL PHENOL HAVING ONE TO FOUR METHYLOL GROUPS IN THE 2,4,6 POSITION WITH A POLYAMINE CONTAINING AT LEAST ONE SECONDARY AMINE GROUP IN AMOUNTS OF AT LEAST ONE MOLE OF SECONDARY POLYAMINE PER EQUIVALENT OF METHYLOL GROUP ON THE PHENOL UNTIL ONE MOLE OF WATER PER EQUIVALENT OF METHYLOL GROUP IS REMOVED, IN THE ABSENCE OF AN EXTRANEOUS CATALYST; AND THEN REACTING THE THUS FORMED MONOMERIC POLYAMINOMETHYL PHENOL WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF (1) AN ACYLATION AGENT, (2) AN OXYALKYLATION AGENT, (3) AN ACYLATION THEN AN OXYALKYLATION AGENT, (4) AN OXYALKYLATION THEN AN ACYLATION AGENT, AND (5) AN ACYLATION THEN AN OCYALKYLATION AND THEN AN ACYLATION AGENT THE PREFORMED METHYLOL PHENOL HAVING ONLY FUNCTIONAL GROUPS SELECTEF FROM THE CLASS CONSISTING OF METHYLOF GROUPS AND PHENOLIC HYDROXYL GROUPS, THE POLYAMINE HAVING ONLY FUNCTIONAL GROUPS SELECTED FROM THE CLASS CONSISTING OF PRIMARY AMINO GROUPS, SECONDARY AMINO GROUPS AND HYDROXYL GROUPS, THE ACYLATION AGENT HAVING UP TO 40 CARBON ATOMS AND BEING SELECTED FROM THE CLASS CONSISTING OF UNSUBSTITUTED CARBOXYLIC ACIDS, UNSUBSTITUTED HYDROXY CARBOXYLIC ACIDS, UNSUBSTITUTED ACYLATED HYDROXY CARBOXYLIC ACIDS, LOWER ALKANOL ESTERS OF UNSUBSTITUTED CARBOXYLIC ACIDS, GLYCERIDES OF UNSUBSTITUTED CARBOXYLIC ACIDS, UNSUBSTITUTED CARBOXYLIC ACID CHLORIDES AND UNSUBSTITUTED CARBOXYLIC ACID ANHYDRIDES, AND THE OXYALKYLATION AGENT BEING SELECTED FROM THE CLASS CONSISTING OF ALPHA-BETA ALKYLENE OXIDES AND STYRENE OXIDE.