C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/38 (2006.01) C07F 9/38 (2006.01) C22B 3/28 (2006.01) C22B 3/32 (2006.01)
Patent
CA 2193726
The invention concerns the use, in the solvent extraction of iron ions from aqueous solutions, of hydrocarbon-soluble aminomethylene phosphonic acid derivatives containing the structural entity (I) in which R1 and R2 are hydrogen, C1-C30 alkyl which may additionally carry up to 15 hydroxyl groups and/or include in the carbon chain up to 14 non-adjacent oxygen atoms, C2-C30 alkenyl, C7-C18 aralkyl or C6-C14 aryl which may be substituted by up to three C1-C12 alkyl groups, C1-C12 alkoxy groups, halogen atoms, cyano groups, hydroxyl groups or C1-C4 alkoxycarbonyl groups.
L'invention concerne l'utilisation, pour séparer par extraction par solvant des ions de fer contenus dans des solutions aqueuses, de dérivés d'acide phosphonique d'aminométhylène solubles dans des hydrocarbures, qui contiennent l'élément structural (I), R?1¿ et R?2¿ désignant hydrogène, alkyle C¿1? à C¿30? qui peut en outre porter jusqu'à 15 groupes hydroxyle et/ou être interrompu par jusqu'à 14 atomes d'oxygène non adjacents, alcényle C¿2? à C¿30?, aralkyle C¿7? à C¿18? ou aryle C¿6? à C¿14? qui peut être substitué par jusqu'à trois groupes alkyle C¿1? à C¿12?, groupes alcoxy C¿1? à C¿12?, atomes d'halogène, groupes cyano, groupes hydroxyle ou groupes alcoxycarbonyle C¿1? à C¿4?.
Ehle Michael
Oppenlander Knut
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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