Chemistry: analytical and immunological testing – Synthetic or natural resin
Patent
1990-07-30
1991-10-29
Lacey, David L.
Chemistry: analytical and immunological testing
Synthetic or natural resin
436 52, 436120, 436164, 436165, 436 43, 210745, 356246, G01N 2182
Patent
active
050616340
ABSTRACT:
A method to continuously measure the level of a water treatment product in boiler feedwater. The product, which includes a copolymer of acrylamide and acrylate and a copolymer of acrylic acid and sodium vinyl sulphonate, is added to the feedwater to prevent the formation of scale in the boiler tubes. The method comprises reacting a sample of the feedwater with a reagent to produce turbidity in the sample and further mixing the newly reacted sample with a portion of previously measured reacted sample. The mixture of previously measured reacted sample and newly reacted sample are then photometrically measured in a pump turbidimeter analyzer to determine the level of product in the feedwater.
REFERENCES:
patent: 3895913 (1975-07-01), Bockowski et al.
patent: 3953136 (1976-04-01), Hach
patent: 4457847 (1984-07-01), Lorenc et al.
patent: 4715710 (1987-12-01), Andersen
Crummett, W. B., and R. A. Hummel, "Determination of Polyacrylamides", Journal AWWA, Feb., 1963, pp. 211-219.
"Products for Process Analysis", Hach Company, Mar. 1989.
Adamson William L.
Hickey James J.
Lacey David L.
Redding David
Zickert Lloyd L.
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