Abstract: Hydroxymethane diphosphonic acid and alkali metal or ammonium salt of such acid are prepared. They are useful in detergent compositions and in sequestering and chelating polyvalent metals.
Abstract: Hydroxymethane diphosphonic acid and alkali metal or ammonium salt of such acid are prepared. They are useful in detergent compositions and in sequestering and chelating polyvalent metals.
Abstract: This invention relates to novel chelating agents and to novel compositions obtainable therefrom. More particularly, the invention relates to the use of novel polyphosphonic acids and their salts as chelating agents.
Abstract: There is provided a process for chelating non-alkali metal ions comprising contacting said metal ions with a phosphorus chelating compound having a formula selected from the group consisting of: ##STR1## WHERE R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are selected from the group consisting of hydrogen, alkali metal and ammonium, X is selected from the group consisting of hydrogen, alkyl, alkenyl, aryl, chloroalkyl, chloroaryl, and halogen of atomic weight 35 to 80, Y is selected from the group consisting of hydroxyl, phenyl and halogen of atomic weight 35 to 80 and Z is selected from the group consisting of hydrogen, phenyl and halogen of atomic weight 35 to 80.
Abstract: Tin salts of polyphosphonic acids, e.g., stannous salts of ethane hydroxy diphosphonic acid and methane phenyl hydroxy diphosphonic acid are prepared.