Inhibiting scale deposition
Most industrial waters contain alkaline earth metal cations, such as calcium, barium, magnesium, etc., and several anions such as bicarbonate, carbonate, sulfate, oxalate, phosphate, silicate, fluoride, etc. When combinations of these anions and cations are present in concentrations which exceed the solubility of their reaction products, precipitates form until these product solubility concentrations are no longer exceeded. As these reaction products precipitate on surfaces of the water-carrying system, they form scale. The scale prevents effective heat transfer, interferes with fluid flow, facilitates corrosive processes, and harbors bacteria. A method of inhibiting scale formation in aqueous systems is described, in which combinations of amino phosphonate compounds and water-soluble polyacrylic acid derivatives are used. (9 claims)
- Assignee:
- Calcon Corp.
- Patent Number(s):
- US 3663448
- OSTI ID:
- 6243093
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ACID CARBONATES
ALKALINE EARTH METAL COMPOUNDS
ANIONS
BACTERIA
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACID SALTS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
CONTROL
CORROSION
CORROSION INHIBITORS
ENERGY SOURCES
ENERGY TRANSFER
FLUORIDES
FLUORINE COMPOUNDS
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HEAT TRANSFER
INHIBITION
IONS
MICROORGANISMS
OIL WELLS
OXALATES
OXYGEN COMPOUNDS
PETROLEUM
PHOSPHATES
PHOSPHORUS COMPOUNDS
SCALE CONTROL
SCALING
SILICATES
SILICON COMPOUNDS
SULFATES
SULFUR COMPOUNDS
WATER TREATMENT
WELLS