Copolymers for the control of the formation and deposition of materials in aqueous mediums

A method of controlling the formation and deposition of at least one compound selected from the group consisting of calcium phosphate, magnesium phosphate, magnesium silicate, calcium silicate, and iron oxide and mixtures thereof on the structural parts of a system containing an aqueous medium which in turn contains the compounds or ions which would otherwise lead to the formation and deposition of said compound or compounds, which comprises introducing into the aqueous medium an effective amount for the purpose of a polymer or the water soluble salt of said polymer, which polymer is comprised of sulfonated styrene moieties and moieties derived from maleic anhydride, the ratio of said styrene moieties to said maleic anhydride derived moieties being from about 2:1 to about 4:1.

A method of dispersing a compound selected from the group of iron oxide, clay and mixtures thereof contained in an aqueous medium which would otherwise deposit on the structural parts containing said medium, which comprises introducing in said medium an effective amount for the purpose of a polymer or the water soluble salt of said polymer, which polymer is comprised of sulfonated styrene moieties and moieties derived from maleic anhydride, the ratio of said styrene to said maleic anhydride derived moieties being from about 1:1 to about 4:1.

A method of controlling the formation and deposition of materials on the structural parts of a steam generating system containing an aqueous medium which in turn contains the materials or ions which would otherwise form and deposit as said materials, which comprises introducing into the aqueous medium an effective amount for the purpose of a polymer or the water soluble salt of said polymer, which polymer is comprised of sulfonated styrene moieties and moieties derived from maleic anhydride, the ratio of said styrene moieties to said maleic anhydride derived moieties being from about 2:1 to about 4:1.

A method of controlling the formation and deposition of at least one compound selected from the group consisting of calcium phosphate, magnesium phosphate, calcium silicate, magnesium silicate, and iron oxide and mixtures thereof on the structural parts of a steam generating system containing an aqueous medium which in turn contains ions which would otherwise lead to the formation and deposition of said compound or compounds, which comprises introducing into the aqueous medium an effective amount for the purpose of a polymer or the water soluble salt of said polymer, which polymer is comprised of sulfonated styrene moieties and moieties derived from maleic anhydride, the ratio of said styrene moieties to said maleic anhydride derived moieties being from about 2:1 to about 4:1.

A method of controlling the formation and deposition of at least one compound selected from the group consisting of calcium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, magnesium silicate, calcium silicate, and iron oxide and mixtures thereof on the structural parts of a system containing an aqueous medium which in turn contains the compounds or ions which would otherwise lead to the formation and deposition of said compound or compounds, which comprises introducing into the aqueous medium an effective amount for the purpose of a polymer or the water soluble salt of said polymer, which polymer is comprised of sulfonated styrene moieties and moieties derived from maleic anhydride, the ratio of said styrene moieties to said maleic anhydride derived moieties being from about 2:1 to about 4:1.

A method of controlling the formation and deposition of at least one compound selected from the group consisting of calcium carbonate, calcium sulfate, calcium phosphate, magnesium phosphate, calcium silicate, magnesium silicate, and iron oxide and mixures thereof on the structural parts of a steam generating system containing an aqueous medium which in turn contains ions which would otherwise lead to the formation and deposition of said compound or compounds, which comprises introducing into the aqueous medium an effective amount for the purpose of a polymer or the water soluble salt of said polymer, which polymer is comprised of sulfonated styrene moieties and moieties derived from maleic anhydride, the ratio of said styrene moieties to said maleic anhydride derived moieties being from about 2:1 to about 4:1.

A method of inhibiting deposits of scale, sludge and other foulants in aqueous systems, said method consisting essentially of adding to said systems 0.05 to 100 ppm of a composition selected from the group consisting of water-soluble copolymers of sulfonated styrene moieties and moieties derived from maleic anhydride, the ratio of said styrene moieties to said maleic anhydride derived moieties being from about 2:1 to about 3:1.