Anionic polymers containing N-vinyl-2-pyrrolidone or other vinyl

Details Anionic polymers containing N-vinyl-2-pyrrolidone or other vinyl Anionic polymers containing N-vinyl-2-pyrrolidone or other vinyl

1986-09-10

1988-04-26

Hruskoci, Peter

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

252180, 210698, C02F 512

Patent

active

047403144

ABSTRACT:
A method of inhibiting scale, generally and specifically and preferably calcium phosphate and calcium carbonate scale, which is found on metal surfaces in contact with industrial cooling waters, boiler waters, oil well drilling waters, and evaporated sea water, which comprises treating the water present in such systems with a few ppm of a water-soluble maleic anhydride or acid co- or terpolymer of N-vinyl-2-pyrrolidone (NVP) or vinyl amide.

REFERENCES:
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patent: 3806367 (1974-04-01), Lange et al.
patent: 3900338 (1975-08-01), Rumpf et al.
patent: 4223120 (1980-09-01), Kurowsky
patent: 4271058 (1981-06-01), Trabitzsch et al.
patent: 4288327 (1981-09-01), Godlewski et al.
patent: 4536046 (1985-07-01), Meunier et al.
patent: 4673508 (1987-06-01), Coleman et al.
"Mineql, A Computer Program for the Calculation of Chemical Equilibrium Composition of Aqueous Systems", Water Quality Laboratory, J. C. Westall et al., Dept. of Civil Eng. MIT, Jul. 1976, pp. 8-10.

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