Surfactant based small molecules for reducing aluminosilicate scale in the bayer process
US9416020B2 · kind B2 · utility
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12References
14Claims
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Key dates
| Filing date | Jan 9, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Mar 16, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F14/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides methods and compositions for inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more GPS-surfactant based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.