Inhibition of calcium sulfate dihydrate crystal growth by phosphonic acids: influence of inhibitor structure and solution pH
Journal Article
·
· Trans. Soc. Pet. Eng. AIME; (United States)
Seeded crystal growth techniques have been applied to study the influence of pH on the performance of several phosphonic acids as calcium sulfate dihydrate crystal growth inhibitors. An increase in the pH of the crystal growth medium over a pH 4 to 9 range brings about an improvement in inhibitor performance that runs parallel to the phosphonic acid titration curve. Accordingly, full inhibitor activity is realized only at pH values that approach the pKa value associated with the loss of the final phosphonic acid proton. 24 references.
- OSTI ID:
- 6507869
- Journal Information:
- Trans. Soc. Pet. Eng. AIME; (United States), Journal Name: Trans. Soc. Pet. Eng. AIME; (United States) Vol. SPE-7862; ISSN TPTEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHEMICAL REACTION KINETICS
CONTROL
CORROSION INHIBITORS
DEPOSITION
HYDRATES
KINETICS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
PH VALUE
PHOSPHONIC ACIDS
REACTION KINETICS
SCALE CONTROL
SULFATES
SULFUR COMPOUNDS
020300 -- Petroleum-- Drilling & Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHEMICAL REACTION KINETICS
CONTROL
CORROSION INHIBITORS
DEPOSITION
HYDRATES
KINETICS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
PH VALUE
PHOSPHONIC ACIDS
REACTION KINETICS
SCALE CONTROL
SULFATES
SULFUR COMPOUNDS