High calcium tolerant deposit control method
US4479878A · kind A · utility
2Cited by
16References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1982 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | Oct 28, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/14
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of controlling deposition of scale and the like in waters having a high calcium ion content is disclosed. The method is applicable to waters having a calcium ion concentration of about 300 ppm Ca.sup.+2 and comprises adding 1-hydroxypropylidene-1,1 diphosphonic acid or water soluble salt thereto. This particular compound is capable of performing the deposit control function in such high calcium waters without itself resulting in substantial deposit control agent-calcium adduct formation which would deleteriously affect the deposit control function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.