Direct catalytic conversion of cellulose materials to ethanol
US7816568B2 · kind B2 · utility
1Cited by
1References
7Claims
0Family size
Inventor
Key dates
| Filing date | Dec 17, 2007 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Nov 7, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Catalytic reactions conducted during acid digestion of cellulose materials, including paper, a wide range of grasses including prairie grass, switch grass, pine wood sawdust, bagasse dried after sugar cane processing, cotton, waste cellulose products and starch materials, are taught for direct conversion to ethanol. The cellulose material is thoroughly wet in concentrated sulfuric acid in the presence of transition metal complexes possessing a degree of symmetry. Ethanol formed during the reaction can be removed by distillation affording a continuous process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.