Process for inhibiting scale formation and modifying the crystal structure of barium sulfate and other inorganic salts
US4898677A · kind A · utility
11Cited by
14References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1986 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Nov 10, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/927
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The deposition of scale-imparting precipitates in aqueous media containing significant amounts of barium sulfate and other scale forming salts (e.g., calcium carbonate and calcium sulfate) is inhibited and controlled by adding a scale-inhibiting amount of a water-soluble acrylic acid copolymer with up to about 30% by weight of a vinyl sulfonate, with the copolymer having a weight average molecular weight of below about 90,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.