The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2014
Filed:
Apr. 12, 2013
Akzo Nobel N.v., Arnhem, NL;
Kornelis Overkempe, Holten, NL;
William John Ernest Parr, Holten, NL;
Johanna Christina Speelman, Warnsveld, NL;
Akzo Nobel N.V., Arnhem, NL;
Abstract
The present invention relates to nitrogen-containing hydroxyethyl substituted compounds to be used as corrosion inhibitors for metal surfaces, for example in aqueous systems and in particular in oil-field applications, e.g. in oil or gas wells, and which could be used under sweet-well conditions as well as under sour-well conditions. It may also be used in oil-field acidizing and fracture-acidizing well stimulation treatment. The compounds belong to the group of partly ethoxylated fatty alkylamines, partly ethoxylated alkyletheramines and partly or fully hydroxyethyl substituted alkylamidopropylamines. The corrosion inhibitors have the formula (I) where R is a hydrocarbyl or an acyl group having 14-24 carbon atoms, or the group R'OCHCHCHwhere R′ is a hydrocarbyl group with 14-24 carbon atoms; X is hydrogen, CHOH or the group Y is hydrogen or CHOH and n is 0-3, with the proviso that at least one of the symbols X and Y is CHOH, at most one of the symbols X is n is at least one when R is an acyl group, and when R is a hydrocarbyl group or the group R′OCHCHCHat least one of the symbols X and Y is hydrogen.