Use of 2-amino-2-methyl-1-propanol as additive in aqueous suspensions of calcium carbonate comprising materials
AssigneeOmya International AG
InventorsMatthias Buri, Samuel Rentsch, Patrick Arthur Charles Gane
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Abstract
Use of 2-amino-2-methyl-1-propanol (AMP) as an additive in an aqueous suspension, containing from 25 to 62 vol. % of at least one calcium carbonate-comprising material and having a pH of between 8.5 and 11, to increase the suspension pH by at least 0.3 pH units, the AMP being added to said suspension in an amount of from 500 to 15000 mg per litre of the aqueous phase of the suspension, wherein the suspension conductivity change is maintained to within 100 μS/cm/pH unit.
Claims21
Use of 2-amino-2-methyl-1-propanol (AMP) as an additive in an aqueous suspension, containing from 25 to 62 vol. % of at least one calcium carbonate-comprising material and having a pH of between 8.5 and 11, to increase the suspension pH by at least 0.3 pH units, wherein the AMP is added to said suspension in an amount of from 500 to 15000 mg per litre of the aqueous phase of the suspension, characterized in that the suspension conductivity change is maintained to within 100 μS/cm/pH unit.
A method to increase the pH of an aqueous suspension, containing from 25 to 62 vol. % of at least one calcium carbonate-comprising material and having a pH of between 8.5 and 11 by at least 0.3 pH units, by the addition of 2-amino-2-methyl-1-propanol (AMP) as an additive, characterized in that the suspension conductivity change is maintained to within 100 μS/cm/pH unit.
Dependencies are inferred from the claim text.