Methods of scale inhibition
Patent
·
OSTI ID:5629989
This method of inhibiting scale formation and/or the formation of solid scale-forming salts in water or brine consists of adding to the water or brine small amounts of certain mono- and diamine methylene phosphonates of low solubility. The compounds are employed in threshold amounts. Preferably no more than 100 ppm need be used, and in a weight ratio of inhibitor compound to cation component of scale-forming salt not in excess of 0.5-1.0. Most commercial conditions require no more than 25 ppm. Polyvalent metals used are iron, calcium, zinc, and magnesium. (18 claims)
- Assignee:
- Calgon Corp.
- Patent Number(s):
- US 3393150
- OSTI ID:
- 5629989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METALS
CALCIUM
CONTROL
CORROSION INHIBITORS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON
MAGNESIUM
METALS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PETROLEUM
PHOSPHONATES
SALTS
SCALE CONTROL
TRANSITION ELEMENTS
WATER TREATMENT
WELLS
ZINC
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METALS
CALCIUM
CONTROL
CORROSION INHIBITORS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON
MAGNESIUM
METALS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PETROLEUM
PHOSPHONATES
SALTS
SCALE CONTROL
TRANSITION ELEMENTS
WATER TREATMENT
WELLS
ZINC