Chemistry: analytical and immunological testing – Oxygen containing – Carbonyl – ether – aldehyde or ketone containing
Reexamination Certificate
2010-01-27
2011-12-27
Soderquist, Arlen (Department: 1777)
Chemistry: analytical and immunological testing
Oxygen containing
Carbonyl, ether, aldehyde or ketone containing
C436S060000, C436S127000, C436S139000, C436S173000, C436S174000
Reexamination Certificate
active
08084264
ABSTRACT:
A method for quantifying the presence of naphthenic acids in a hydrocarbon-comprising liquid that includes: contacting a hydrocarbon-comprising liquid with gaseous ammonia; isolating a reaction product produced by the contacting step; and analyzing the reaction product for the presence of naphthenates using a mass spectrometry technique. The naphthenic acids known to form commercial naphthenate deposits can be (i) ions of tetraprotic carboxylic acids having molecular weights ranging from 1225 to 1270 Daltons, (ii) n-alkyl or branched carboxylic acids having molecular weights ranging from 250 to 650 Daltons, or (iii) both.
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Juyal Priyanka
Mapolelo Mmilili M.
Marshall Alan G.
Rodgers Ryan P.
Florida State University Research Foundation, Inc.
Novak Druce & Quigg LLP
Soderquist Arlen
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