The determination of corrosion inhibitor residual concentrations
As future oil wells are targeted to greater depths and more corrosive conditions, newer corrosion inhibitor treating programs will be used. One current method is the use, recovery, and reuse of an inhibitor-organic diluent solution. Upon recovery and before reuse of this mixture, the amount of inhibitor remaining is quantified; additional make-up inhibitor is then added, as necessary, to maintain the desired inhibitor-concentration range. This paper compares older analytical methods with newer techniques developed at Texaco using carbon-13 NMR (/sup 13/C NMR) and Fourier Transform infrared (FT-IR) spectroscopy for determining residual inhibitor concentrations. These newer methods have been found to be superior to the titrametric methods. Different components of the corrosion inhibitor can be used in the analytical determination. An ester peak is easily characterized in both the /sup 13/C NMR and FT-IR spectra. This ester peak can be used to quantify the concentration of the residual inhibitor.
- Research Organization:
- Texaco Inc., P.O. Box 425, Bellaire, TX 77401
- OSTI ID:
- 5247480
- Journal Information:
- Mater. Performance; (United States), Journal Name: Mater. Performance; (United States) Vol. 25:5; ISSN MTPFB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
ADDITIVES
CARBON 13
CARBON ISOTOPES
CORROSION INHIBITORS
CORROSION RESISTANCE
DEPTH
DIMENSIONS
EVEN-ODD NUCLEI
FOURIER TRANSFORM SPECTROMETERS
INFRARED SPECTRA
ISOTOPES
LIGHT NUCLEI
MANAGEMENT
MATERIALS RECOVERY
MEASURING INSTRUMENTS
NMR SPECTRA
NUCLEI
OIL WELLS
ORGANIC COMPOUNDS
PROCESSING
QUANTITY RATIO
RECOVERY
RECYCLING
SPECTRA
SPECTROMETERS
STABLE ISOTOPES
WASTE MANAGEMENT
WASTE PROCESSING
WELLS