Oligomer-containing phosphate scale inhibitors
US5023000A · kind A · utility
34Cited by
5References
3Claims
0Family size
Assignee
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Key dates
| Filing date | May 10, 1990 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | May 10, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/301
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Calcium carbonate scale is controlled by treating calcium carbonate containing waters with a predominantly phosphinate containing composition where has as its major ingredient more than 32 mole percent of a phosphinicosuccinic acid oligomer having the probable structural formula . ##STR1## M is H, Na, K, NH.sub.4, or mixtures thereof; and m and n are either 0 or a small whole number with proviso that either m or n is a small whole number and the sum of m plus n is greater than 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.