| 摘要 |
In one embodiment, a scale inhibitor comprising at least one polymethylenephosphonate derivative having the following formula: wherein n is a number, wherein M is hydrogen or a cation, wherein R<SUB>1</SUB>, R<SUB>2</SUB>, and R<SUB>3 </SUB>are each independently selected from the group consisting of CH<SUB>2</SUB>PO<SUB>3</SUB>M<SUB>2</SUB>, CH<SUB>2</SUB>R<SUB>4</SUB>, wherein R<SUB>4 </SUB>is CHOHCH<SUB>3</SUB>, CHOHCH<SUB>2</SUB>Cl, or CHOHCH<SUB>2</SUB>OH, (CH<SUB>2</SUB>)<SUB>m</SUB>SO<SUB>3</SUB>M, wherein m is 3 or 4, and CH<SUB>2</SUB>CH<SUB>2</SUB>R<SUB>5</SUB>, wherein R<SUB>5 </SUB>is CONH<SUB>2</SUB>, CHO, COOR<SUB>6</SUB>, COOX, or CN, wherein R<SUB>6 </SUB>is CH<SUB>3 </SUB>or C<SUB>2</SUB>H<SUB>5</SUB>, and wherein X is an alkali metal or ammonium, and wherein at least one of R<SUB>1</SUB>, R<SUB>2</SUB>, and R<SUB>3 </SUB>is not CH<SUB>2</SUB>PO<SUB>3</SUB>M<SUB>2</SUB>. In another embodiment, a method for inhibiting scale formation in water, and in still another embodiment, a method for sequestering iron ions in a water systems, each of the methods comprising the step of providing the water with the above described polymethylenephosphonate derivative. |
