Process to recover hydrogen fluoride from hydrogen fluoride-polymer compositions
US10280082B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Sep 28, 2017 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Sep 29, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of preparing aqueous hydrogen fluoride is provided. The method includes providing a composition including a cross-linked polymer with absorbed hydrogen fluoride. The cross-linked copolymer includes acrylamide units and acrylic acid salt units. The method further includes contacting the composition with water to release at least a portion of the hydrogen fluoride from the composition to the water to form the aqueous hydrogen fluoride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.