Monitoring and dosage control of tagged treatment polymers in industrial water systems
AssigneeDow Global Technologies LLC
InventorsKaylie L. Young, Clark H. Cummins, William C. Glover, Robert D. Grigg
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Abstract
The present invention relates to a fluorescently-tagged (co)polymer useful as a scale inhibitor in industrial water systems. Said (co)polymer comprises a (i) reactive fluorescent compound selected from a diazole compound (ii) at least one monoethylenically unsaturated acid monomer, and (iii) optionally, at least one monoethylenically unsaturated acid-free monomer.
Claims6
A method for maintaining the desired amount of diazole-tagged (co)polymer in an industrial water system comprising the steps of:
- a) adding a diazole-tagged (co)polymer to water such that a desired concentration of said diazole-tagged (co)polymer is present in said water, wherein the diazole-tagged (co)polymer comprises:
- (i) a diazole compound, or salt thereof, represented by one of the following formulas:
- wherein R1 to R11 are independently H, C1 to C12 alkyl, C1 to C12 aryl, —SO3−, —PO32−, —CO2−, or —N+R103 wherein each R10 is independently H or C1 to C12 alkyl and X is oxygen or sulfur,
- b) using a fluorometer to detect a fluorescent signal of said diazole-tagged polymer;
- c) converting the fluorescent signal of the polymer to a concentration of said diazole-tagged polymer;
- and
- d) adjusting the concentration of said diazole-tagged copolymer according to what the desired concentration is for said diazole-tagged copolymer in the industrial water system.
A method to inhibit scale in an industrial water system comprising the steps of:
- a) providing a scale inhibitor to an industrial water system susceptible to unwanted scaling
- and
- b) adding to the water of said industrial water system from 0.1 ppm to 50 ppm of a scale inhibitor;
- wherein said scale inhibitor is a diazole-tagged (co)polymer comprising:
- (i) a diazole compound, or salt thereof, represented by one of the following formulas:
- wherein R1 to R11 are independently H, C1 to C12 alkyl, C1 to C12 aryl, —SO3−, —PO32−, —CO2−, or —N+R103 wherein each R10 is independently H or C1 to C12 alkyl and X is oxygen or sulfur.
Dependencies are inferred from the claim text.