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US 2026/0070068 A1Published application
Ammoniated polycarbamide separation aids for mineral flotation
AssigneeHexion Inc.
InventorsByung Young No, John W. Green, Cedar C. Lechner-Riehle, Robbie B. Currie, Matthew Ting
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Abstract
Compositions and methods for the separation and recovery of one or more minerals from a mineral ore bulk material are provided. The compositions and methods include selectively depressing minerals utilizing an ammoniated polycarbamide as a separation aid. The ammoniated polycarbamide reduces, or eliminates, the conventional use of depressants such as sodium hydrosulfide (NaSH) in mining flotation processes, including copper-molybdenum (Cu—Mo) separations.
Claims21
A separation aid composition comprising:
- an ammoniated polycarbamide comprising a reaction product of formaldehyde, urea, and ammonia wherein a mole ratio of formaldehyde to a combination of urea and ammonia is from 1 to 4;
- 0.01 wt. % to 30 wt. % of a biopolymer;
- and
- 0.1 to 50 wt. % of a supplemental depressant.
1 more element
A separation aid composition comprising:
- an ammoniated polycarbamide comprising a reaction product of formaldehyde, urea, and ammonia wherein a mole ratio of formaldehyde to a combination of urea and ammonia is from 1 to 4;
- 0.1 wt. % to 20 wt. % of a hydrophilic polymer;
- and
- 0.1 to 50 wt. % of a supplemental depressant.
1 more element
Dependencies are inferred from the claim text.