Amine-aldehyde resins and uses thereof in separation processes
AssigneeGeorgia-Pacific Chemicals LLC
InventorsJames Wright, Carl R. White, Kurt Gabrielson, John B. Hines, Lisa M. Arthur, Paul Hart, Richard Rediger
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Abstract
Amine-aldehyde resins are disclosed for removing a wide variety of solids and/or ionic species from the liquids in which they are suspended and/or dissolved. These resins are especially useful as froth flotation depressants in the separation of bitumen from sand and/or clay or in the beneficiation of clay (e.g., kaolin clay) from an impure clay-containing ore. The resins are also useful for treating aqueous liquid suspensions to remove solid particulates, as well as for removing metallic ions in the purification of water.
Claims26
A method for purifying an aqueous liquid suspension, comprising:
- treating a liquid suspension comprising clay with a urea-formaldehyde resin having a formaldehyde to urea molar ratio of about 1.5:1 to about 4:1, wherein an alkaline reaction condition is maintained throughout the synthesis of the urea-formaldehyde resin;
- and
- removing, either after or during the treating step, a purified liquid or at least a portion of the clay by sedimentation or floatation.
A method for purifying an aqueous liquid suspension, comprising:
- treating a liquid suspension comprising a solid contaminant with a generally cationic urea-formaldehyde resin having a formaldehyde to urea molar ratio of about 1.5:1 to about 4:1, wherein an alkaline reaction condition is maintained throughout the synthesis of the urea-formaldehyde resin;
- and
- removing, either after or during the treating step, a purified liquid or at least a portion of the solid contaminant by sedimentation or floatation.
Dependencies are inferred from the claim text.