Sustained-release scale inhibitors
AssigneeMaterials Engineering and Technical Support Services
InventorsKenneth J. Heater, Adriane Lewis, Kelsey Turner
Life of this patent
Estimating the term…
Abstract
Sustained-release scale inhibitors are provided, the sustained-release scale inhibitors comprising: a scale inhibitor; and a polymer, wherein the polymer may be biodegradable; and, optionally, an additive selected from the group consisting of an anti-hydrolysis additive, an antioxidant, a corrosion inhibitor, a biocide, a hydrogen sulfide scavenger, a demulsifier, a clay stabilizer, and mixtures thereof, wherein the scale inhibitor and the additive, when present, are at least partially co-encapsulated by the polymer. Methods for making and using the sustained-release scale inhibitors are also provided.
Claims32
A sustained-release scale inhibitor, comprising:
- (A) a scale inhibitor;
- and
- (B) a polymer;
- and, optionally,
- (C) an additive selected from the group consisting of an anti-hydrolysis additive, an antioxidant, a corrosion inhibitor, a biocide, a hydrogen sulfide scavenger, a demulsifier, a clay stabilizer, and mixtures thereof,
- wherein the scale inhibitor and, when present, the additive, are at least partially co-encapsulated by the polymer.
A sustained-release scale inhibitor comprising:
- (A) a scale inhibitor comprising trimethylenephosphonic acid (ATMP) and/or bis-hexamethylene triamine phosphonate (BHMT);
- (B) a polylactic acid (PLA) polymer;
- and
- (C) an anti-hydrolysis additive comprising calcium stearate and/or bis(2,6-diisopropylphenyl) carbodiimide,
- wherein the scale inhibitor and the anti-hydrolysis additive are at least partially co-encapsulated by the PLA polymer.
Dependencies are inferred from the claim text.