Scale and corrosion inhibitors
AssigneeRhodia Consumer Specialties Limited
InventorsGary Woodward, Graham Philip Otter, Keith Philip Davis, Robert Eric Talbot
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Abstract
A scaled and corrosion inhibitor for the use in the treatment of water comprises at least one oxyalkylene unit and at least one phosphonate unit (e.g. a unit derived from a mono- or di-phosphonic acid such as VPA or VDPA). Inhibitors according to the present invention have been found to exhibit both scale-inhibiting and corrosion-inhibiting properties, especially in the treatment of cooling water and water used in oilfield applications.
Claims16
A scale inhibitor or corrosion inhibitor for use in the treatment of water, said inhibitor comprising at least one oxyalkylene unit and at least one phosphonate unit.
A scale inhibitor or corrosion inhibitor according to any one of the
- 5
- wherein R1 and R2 (which may be the same or different) denote H, alkyl, aryl, or alkoxy and (n+m)=1 to 100, to form a homo-, random mixed or block co-polymer;
- 6
- Z1 is H, alkyl, aryl or Z1,
- R3 and R4 are each independently alkyl, aryl, alkoxy, or H;
- Y is PO3X2, alkyl, aryl, alkoxy or H;
- and
- X is alky, H, alkali metal, or amine salt.
Dependencies are inferred from the claim text.