N-CARBOXY-ALKANE-AMINOALKANE-DIPHOSPHONIC ACIDS, N- CARBOXY-ALKANE-AZACYCLOALKANE-DIPHOSPHONIC ACIDS AND N-CARBOXY-ALKANE-AMINOARYL-ALKANE-DIPHOSPHONIC ACIDS AND PROCESS FOR THEIR PRODUCTION

摘要

An N-carboxy-alkane-aminoalkane-diphosphonic acids, N-carboxy-alkane-azacycloalkane-diphosphonic acids and N-carboxy-alkane-aminoaryl-alkane-diphosphonic acid having the general formula wherein R is H, CH3, -(CH2)10CH3, C6H5, C2H4OH or CH2COOH, R1 is PO3H2,-R'2 is H, CH3 or R3 or together with R1 forms a ring of formula -(CH2)5- and R3 is (CH2)mCOOH where m is 2 to 12,-CH2-C(CH3)2-COOH or . The compounds are suitable particularly for corrosion inhibitors and for products used in the treatment of service water.