Patent ES-8603352-A1 (ES)
Title: Compositions comprising mineral particles in suspension and method of treating aqueous systems therewith.
IPC: C02F1/52
Filed: 1983-09-23
Abstract: A composition for treating an aqueous system, which composition comprises (a) an aqueous slurry of mineral particles of at least 40% m/m mineral solids concentration, characterised in that it also comprises (b) an agent or mixture of agents that at least substantially maintains the mobility of the - slurry, such that the apparent viscosity of the slurry does not exceed 500cP (0.5 Pa.s) (as measured at a shear rate of 600 s-1), and that exerts a flocculating action upon dilution of the composition with or into water at a dilution ratio of at least 20:1 (m/m), said agent(s) being selected from cationic polyelectrolytes that have nitrogen-containing groups, amphoteric polyelectrolytes that have nitrogen-containing groups and, provided that the mineral particles include calcium hydroxide particles, anionic polyacrylamides. - (14pp) EPAB- EP-104904 B A composition for treating an aqueous system, which composition comprises (a) an aqueous slurry of mineral particles of at least 40% m/m mineral solids concentration, characterised in that it also comprises (b) an agent or mixture of agents that at least substantially maintains the mobility of the slurry, such that the apparent viscosity of the slurry does not exceed 500cP (0.5 Pa.s) (as measured at a shear rate of 600 s-1), and that exerts a flocculating action upon dilution of the composition with or into water at a dilution ratio of at least 20:1 (m/m), said agent(s) being selected from cationic polyelectrolytes that have nitrogen-containing groups, amphoteric polyelectrolytes that have nitrogen-containing groups and, provided that the mineral particles include calcium hydroxide particles, anionic polyacrylamides. GBAB- GB2127395 B A composition for treating an aqueous system, which composition comprises (A) an aqueous slurry of mineral particles of at least 40% m/m mineral solids concentration, characterised in that it also comprises (b) an agent or mixture of agents that at least substantially maintains the mobility of the slurry, such that the apparent viscosity of the slurry does not exceed 500 cp (0.5 Pa.s) (as measured at a shear rate of 600 s power (-1), and that exerts a flocculating action upon dilution of the composition with or into water at a dilution ratio of at least 20:1 (m/m), said agent(s) being selected from cationic polyelectrolytes that have nitrogen-containing groups, amphoteric polyelectrolytes that have nitrogen-containing groups and, provided that the mineral particles include calcium hydroxide particles, anionic polyacrylamides. USAB- US4610801 A Compsn. for treating an aq. syst., comprises (a) an aq. slurry of mineral particles contg. 40% or more (m/m) mineral solids concn., also contg. (b) an agent (mixt.) which at least maintains the slurry mobility, such that apparent viscosity is 500 cp or less (at 600 per sec. shear rate) and exerts a flocculating action upon dilution with or into water at dilution ratio 20:1 or more (m/m). Agent (b) comprises a cationic-or amphoteric polyelectrolyte having N-contg. gps. Mineral particles also comprise Ca(OH)2 particles and/or anionic polyacrylamides.