N-sulphoalkane-aminoalkane phosphonic acids and their alkali...

Details N-sulphoalkane-aminoalkane phosphonic acids and their alkali... N-sulphoalkane-aminoalkane phosphonic acids and their alkali...

C - Chemistry, Metallurgy

07

F

260/501.1

C07F 9/38 (2006.01) C02F 1/68 (2006.01) C02F 5/14 (2006.01)

Patent

CA 1112663

ABSTRACT OF THE DISCLOSURE The present invention provides a process for producing a N-sulphoalkane-aminoalkane phosphonic acids having the general formula Image wherein R1 is H CH3, C2H5, C6H5, CH2NH2 or C2H4PO3H2, R2 is H or PO3H2, R3=CnH2nSO3H or CH2PO3H2, where n is from 1 - 11 and R4= H (when R3 is other than CH2PO3H2) or CnH2nSO3H where n is 1 - 11 or a salt thereof which comprises reacting an aminophosphonic acids having the general formula Image wherein R1 is H, CH3, C2H5, CH2NH2, C2H4PO3H2, or C6H5, R2 is H or PO3H2, R? is H or CH2PO3H2 in an alkaline medium with an alkane-sulphonic acids or a alkali metal salt thereof in a molar ratio of 1:1 to 1:2 with heating said alkene sulphonic acid having the formula CnH2n-1SO3H, where- in n is from 2 to 11 and one hydrogen atom can be replaced by an SO3H or a phenyl group.

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