Silica scale inhibitors
AssigneeSolenis Technologies, L.P.
InventorMichael A. Todd
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Abstract
Industrial water such as in a geothermal unit is stabilized against silica polymerization and flocculation by using a combination of inhibitors including a nonionic polyether and a monomeric polycarboxylate.
Claims20
A method of inhibiting the formation of silica scale in a geothermal system, comprising treating the water in the geothermal system with an anti-scalant effective amount of a combination of two inhibitors comprising a first inhibitor and a second inhibitor, wherein the first inhibitor comprises polyethylene glycol having a minimum molecular weight of 2000 g/mol and wherein the second inhibitor comprises EDTA or pentetic acid.
A method of inhibiting the formation of silica scale in the water of a geothermal system, comprising treating the water of the geothermal system with an anti-scalant effective amount of a combination of two inhibitors consisting of a first inhibitor and a second inhibitor, wherein the first inhibitor comprises a polyethylene glycol having a molecular weight of at least 2000 g/mol and the second inhibitor comprises EDTA, pentetic acid, or salts thereof.
An aqueous composition stabilized against silica polymerization and flocculation comprising water and silica, and further comprising stabilizing amounts of a first inhibitor comprising a polyethylene glycol having a molecular weight of at least 4000 g/mol and of a second inhibitor comprising EDTA or pentetic acid.
Dependencies are inferred from the claim text.