Corrosion inhibition of aqueous solutions of inorganic mineral acids

Patent · Tue Jun 15 04:00:00 EDT 1971

OSTI ID:5604141

Stanford, J R

A particularly corrosive use of mineral acids is the employment of 15% solutions and, in some instances, even more concentrated solutions of hydrochloric acid in oil well acidizing applications. It has been found that aqueous solutions of inorganic mineral acids, particularly hydrochloric acid solutions, may be inhibited against their corrosive tendencies toward ferrous metals by adding novel compositions of the invention whereby inhibited mineral acid aqueous solutions are provided. In its simplest embodiment the invention comprises using in combination the Mannich reaction products of a hydroabietyl amine, formaldehyde, and certain aliphatic aldehydes in combination with an acetylenic alcohol which contains from 3 to 12 carbon atoms. (7 claims)

• Assignee: Nelco Chemical Co.
• Patent Number(s): US 3585136
• OSTI ID: 5604141
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ACIDIZATION
ALCOHOLS
ALDEHYDES
AMINES
CHEMICAL COMPOSITION
CORROSION INHIBITORS
CORROSIVE EFFECTS
ELEMENTS
ENERGY SOURCES
FORMALDEHYDE
FOSSIL FUELS
FUELS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
IRON
METALS
OIL WELLS
ORGANIC COMPOUNDS
PETROLEUM
TRANSITION ELEMENTS
WELLS