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:
Feb. 13, 2001
Filed:
Jun. 02, 1998
Ljiljana V. Minevski, The Woodlands, TX (US);
Janet A. Gaboury, Blue Bell, PA (US);
Betzdearborn, Trevose, PA (US);
Abstract
The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a thiacrown ether compound. The compounds are monomeric or polymeric and have from 4 to about 10 sulfur atoms on each of the crown rings. The polymeric thiacrown ether ring structures are substituted with polymerized ethylenically unsaturated monomers and have from 4 to about 10 sulfur atoms on each of the crown rings. In some embodiments of the invention, a linkage “M” connects the thiacrown ether ring structures and the polymers and M is O; S; COO; C,to C,substituted or unsubstituted linear or branched alkylene wherein the substituent is OH, SH, F, Br, Cl, I, COOH, amine, mono- or di- C,to C,alkylamino, C,to C,lower alkanoylamino or nitro; or M is NR,where R,is H or C,to C,alkyl.