Carboxylate polymers for internal scale control agents in boiler

Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...

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134 2219, 210701, 252180, 252 82, C02F 510

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044578474

ABSTRACT:
A method of treating hardness present in boiler waters which are in contact with heat transfer surfaces to prevent and remove scale caused by such hardness which comprises treating such waters with a water-soluble anionic vinyl polymer containing at least 30% by weight of carboxylate functionality with said polymer having a molecular weight within the range of 500-50,000 and with the amount of such polymer being within the range of 1-30 ppm per ppm hardness present in such waters.
In a preferred embodiment, the boiler waters are simultaneously treated with the water-soluble anionic vinyl polymers containing carboxylate functionality and another water-soluble anionic vinyl polymer which has dispersing properties.

REFERENCES:
patent: 2327302 (1943-08-01), Dittmar
patent: 2783200 (1957-02-01), Crum et al.
patent: 2980610 (1961-04-01), Ruehrwein
patent: 3285886 (1966-11-01), Gunderson et al.
patent: 3293152 (1966-12-01), Herbert et al.
patent: 3296027 (1967-01-01), Jacklin
patent: 3324063 (1967-06-01), Teot
patent: 3331773 (1967-07-01), Gunderson
patent: 3463730 (1969-08-01), Booth et al.
patent: 3492240 (1970-01-01), Hettinger
patent: 3505238 (1970-04-01), Liddell
patent: 3514376 (1970-05-01), Salutsky
patent: 3549538 (1970-12-01), Jacklin
patent: 3549548 (1970-12-01), Newman
patent: 3578589 (1971-05-01), Hwa et al.
patent: 3617577 (1971-11-01), King
patent: 3623991 (1971-11-01), Sabatelli et al.
patent: 3658710 (1972-04-01), Puckorios et al.
patent: 3663448 (1972-05-01), Ralston
patent: 3666664 (1972-05-01), Lorenc et al.
patent: 3682224 (1972-08-01), Bleyle
patent: 3699048 (1972-10-01), Krueger et al.
patent: 3709815 (1973-01-01), Boothe et al.
patent: 3709816 (1973-01-01), Walker et al.
patent: 3752761 (1973-08-01), Boothe et al.
patent: 3755264 (1973-08-01), Testa
patent: 3756257 (1973-09-01), Rice et al.
patent: 3766077 (1973-10-01), Hwa et al.
patent: 3790610 (1974-02-01), Lum et al.
patent: 3806367 (1974-04-01), Lange et al.
patent: 3810834 (1974-05-01), Jones et al.
patent: 3836200 (1974-09-01), Booth
patent: 3839215 (1974-10-01), Molders
patent: 3856755 (1974-12-01), Vogt et al.
patent: 3879288 (1975-04-01), Siegele
patent: 4001134 (1977-01-01), Markofsky et al.
patent: 4029577 (1977-06-01), Godlewski et al.
patent: 4048066 (1977-09-01), Cuisia et al.
patent: 4072607 (1978-02-01), Schiller et al.
patent: 4085045 (1978-04-01), Song et al.
patent: 4118318 (1978-10-01), Welder et al.
patent: 4147627 (1979-04-01), Goodman
patent: 4163733 (1979-08-01), Buckman et al.
patent: 4171988 (1979-10-01), Phillips et al.
patent: 4175100 (1979-11-01), Schiller et al.
patent: 4209398 (1980-06-01), Ii et al.
patent: 4271058 (1981-06-01), Trabitzsch
patent: 4288327 (1981-04-01), Godlewski et al.
patent: 4335220 (1982-06-01), Coney
patent: 4361492 (1982-11-01), Dubin
The Investigation of Scaling & Corrosion Mechanisms Using Process Simulation, 41st Annual Meeting Intl. Water Conference, 1980, by J. A. Kelly, P. T. Colombo, G. W. Flasch of Nalco Chemical Co.
Article in "Corrosion/1979", by Cuisia, et al.
Article written by A. E. Stafford, which appeared in Technical Journal BR. Polym. Jr., 1972, 4, 231-237.
Article from Jo. Amer. Chem. Soc., vol. 79, pp. 4898-4900, Authors, Williams, Forrest V. and Ruehrwein, Robert A.
Thurston, "Experimental Plant for Studying Methods of Controlling Scale Formation in Boilers", J. Chem. & Ind., Jul. 10, 1965, pp. 1238-1243.
Zeleny et al., "The Role of Organic Additives in Preventing Scale Formation on Heating Surfaces," Combustion, Feb. 1963, pp. 47-49.
Denman et al., "Boiler Scale Control with Polyacrylates and Methacrylates," Proc. 28th Int. Water Conf., 1967, pp. 85-93.
Woodberry, "A New Anionic Polyacrylamide Flocculant", Toppi, Sep. 1961, pp. 156A-160A.
Swanson, "Advances in Boiler Water Treatment", Ind. Water Eng., vol. 4, #12, Dec. 1967, pp. 22-25.
Edwards, "Role of Polymeric Flocculants in Sediment Removal in Condenser Cooling Water Systems," J. Applied Chem., May 1969, pp. 141-146.
Sherry et al., "Current Trends in Corr. Cont. at W. Thurrock Power Station," Chem. & Ind., Jan. 1964, pp. 102-106.
Sweett et al., "Scale Control by Polyacrylates," Desalination, Aug. 1970, pp. 167-175.
Denman et al., "Boiler Scale Control in the Carbonate Cycle with Synthetic Polymer," Proc. Int. Water Conf., 1968, pp. 119-123.

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