Method for sulfonating and oxidizing sawdust to form a sorbent
US11618007B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Oct 6, 2022 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Oct 6, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/308
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for producing a modified sawdust sorbent. The method involves sulfonating sawdust with sulfuric acid and oxidizing the sulfonated sawdust with hydrogen peroxide. The method yields a modified sawdust sorbent containing sulfonated and oxidized cellulose. The modified sawdust sorbent has a higher surface area, higher organic dye adsorption capacity, and more rapid organic dye adsorption rate than unmodified sawdust. A method of using the modified sawdust sorbent for organic dye removal from water is included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.