Amorphous silica and its manufacturing method
US7998448B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Oct 17, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Dec 28, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09B3/70
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A production method of amorphous silica comprises a step of preparing organic waste containing silicon oxide as a starting material, a step of immersing the organic waste in a carboxylic acid aqueous solution having a hydroxyl group, a step of washing the organic waste in water, and a step of heating the organic waste in the air atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.