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A composition for inhibiting the corrosion of ferrous metal pipelines used to transport petroleum hydrocarbons comprising a major portion of a mixture of C36 dicarboxylic dimer acid and a C54 trimer acid, which mixture has an acid number of at least 110 and from 0.5 up to about 5% of a composition f

A composition for inhibiting the corrosion of ferrous metal pipelines used to transport petroleum hydrocarbons comprising a major portion of a mixture of C36 dicarboxylic dimer acid and a C54 trimer acid, which mixture has an acid number of at least 110 and from 0.5 up to about 5% of a composition from the group consisting of: (a) an N,N′-di(ortho-hydroxyarylidene)-1,2-alkylenediamine in which the arylidene radical contains 6-7 carbon atoms and the alkylene radical contains 2-3 carbon atoms; and (b) a polymeric condensation product obtained by the reaction of a phenol having two reactive ring positions, a lower aliphatic aldehyde having 1-2 carbons, and a polyamine having a reactive hydrogen atom on at least two amino nitrogens, said condensation product being formed by condensing the foregoing reactants at a molar ratio of 2 mols of said aldehyde per mol of said phenol and a molar ratio of phenol to polyamine in the range of 1:1 to 2:1, respectively, at an elevated reaction temperature sufficient to form a polymerized condensation product.

대표청구항 ▼

A composition for inhibiting the corrosion of ferrous metal pipelines used to transport petroleum hydrocarbons comprising a major portion of a mixture of C36 dicarboxylic dimer acid and a C54 trimer acid, which mixture has an acid number of at least 110 and from 0.5 up to about 5% of a composition f

A composition for inhibiting the corrosion of ferrous metal pipelines used to transport petroleum hydrocarbons comprising a major portion of a mixture of C36 dicarboxylic dimer acid and a C54 trimer acid, which mixture has an acid number of at least 110 and from 0.5 up to about 5% of a composition from the group consisting of: (a) an N,N′-di(ortho-hydroxyarylidene) - 1,2-alkylenediamine in which the arylidene radical contains 6-7 carbon atoms and the alkylene radical contains 2-3 carbon atoms; and (b) a polymeric condensation product obtained by the reaction of a phenol having two reactive ring positions, a lower aliphatic aldehyde having 1-2 carbons, and a polyamine having a reactive hydrogen atom on at least two amino nitrogens, said condensation product being formed by condensing the foregoing reactants at a molar ratio of 2 mols of said aldehyde per mol of said phenol and a molar ratio of phenol to polyamine in the range of 1:1 to 2:1, respectively, at an elevated reaction temperature sufficient to form a polymerized condensation product.