Method for recycling supercritical waste liquid generated during process of producing silica aerogel blanket
US12157672B2 · kind B2 · utility
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Key dates
| Filing date | Nov 13, 2018 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Apr 23, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a method for recycling supercritical waste liquid and a method for producing a silica aerogel blanket capable of reducing the production costs and preventing the deterioration in thermal insulation performance of a silica aerogel blanket, the method including adding sulfuric acid to supercritical waste liquid to remove ammonium ions in the form of ammonium sulfate salt, the ammonium ions which are present in the supercritical waste liquid, and reusing supercritical waste liquid from which the ammonium ions are removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.