Thermocondensed lignocellulose material, and a method and an oven for obtaining it
US4954620A · kind A · utility
10Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Sep 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This material which has a hemi-cellulose content of less than 2%, a benzopyrene content of less than 2 .mu.g/kg and a calorific value which is about 20% greater than that of the starting material is obtained by isothermal treatment between 220.degree. C. and 280.degree. C. for a period of thirty minutes using crossed flows of treated material and of oxygen-free hot gases in an oven including stirring means (6,9) and a gas generator (1) with the gas being circulated by a fan (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.