Composition For Dressing Phosphate Ore
The invention relates to a flotation agent for phosphate ore, comprising at least one fatty acid and at least one sarcosinate of the formula (I) wherein R is a C 7 to C 21 alkyl or alkenyl group, which sarcosinate may be present in the form of a cation derived therefrom caused by protonation of the nitrogen atom, wherein the amount of fatty acid is from 70 to 99 wt.-%, and wherein the amount of the sarcosinate of the formula (I) is from 1 to 30 wt.-%.
1 . A flotation agent for phosphate ore, comprising at least one fatty acid and at least one sarcosinate of the formula (I)
wherein R is a C 7 to C 21 alkyl or alkenyl group, wherein the sarcosinate may be present in the form of a cation derived therefrom, caused by protonation of the nitrogen atom, wherein the amount of fatty acid is from 80 to 99 wt.-%, and wherein the amount of the sarcosinate of the formula (I) is from 1 to 20 wt.-%.
2 . The flotation agent as claimed in claim 1 , wherein the fatty acid has from 8 to 26 carbon atoms.
3 . The flotation agent as claimed in claim 1 , wherein R is a C 11 to C 19 residue.
4 . (canceled)
5 . A process for flotating a phosphate ore, the process comprising the step of adding from 100 to 1000 g/t of the flotation agent as claimed in claim 1 to an aqueous suspension of the phosphate ore to form a mixture, and subsequently aerating the mixture.
6 . The flotation agent as claimed in claim 2 , wherein R is a C 11 to C 19 residue.
7 . A process for flotating a phosphate ore, the process comprising the step of adding from 100 to 1000 g/t of the flotation agent as claimed in claim 2 to an aqueous suspension of the phosphate ore to form a mixture, and subsequently aerating the mixture.
8 . A process for flotating a phosphate ore, the process comprising the step of adding from 100 to 1000 g/t of the flotation agent as claimed in claim 3 to an aqueous suspension of the phosphate ore to form a mixture, and subsequently aerating the mixture.