Iron-complexing compositions containing stannous chloride
US6177027A · kind A · utility
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14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Nov 8, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J49/53
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Iron-complexing or scavenging compositions are provided having particular utility as downhole well treatments or as a part of regenerating media for cation exchange resins. The compositions may be in dry or liquid form and preferably include stannous chloride, an acid selected from the group consisting of phosphorous acid, phosphoric acid and mixtures thereof, and sodium hexametaphosphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.