N-carboxyalkane-aminoalkane polyphosphonic acids and their...

Details N-carboxyalkane-aminoalkane polyphosphonic acids and their... N-carboxyalkane-aminoalkane polyphosphonic acids and their...

C - Chemistry, Metallurgy

07

F

260/501.1

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

Patent

CA 1112664

ABSTRACT OF THE DISCLOSURE The present invention provides an N-carboxyalkane- aminoalkane polyphosphonic acid, of the formula Image wherein R1 is H, CH3, C2H5, C2H4OH, CH2COOH, C6H6, or CnH2nPO3H2, wherein n is 1 or 2, R2 is H or PO3H2, R3 is H or CH2PO3H2, R3 is CH2PO3H2, provided that when R1 and R2 are H and R4 = -(CH2)mCOOH, wherein m = 2 or 3, Image or Image or an alkaline metal salt thereof. The compounds can be used wherever good complexing efficiency with respect to polyvalent metal ions is desirable. Thus, they are applicable in the field of water treatment, finishing of textiles and in the production of pulp and paper in cases in which it is important to eliminate the negative influence of polyvalent cations.

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