Process for preparing oil sorbent and device for continuously preparing the same
US5585319A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1994 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Feb 8, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/681
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for preparing an oil sorbent excellent in oil sorptivity and water repellency and a device preparing the same are disclosed. The process for preparing an oil sorbent comprises mechanically fibrillating, or shredding and grinding lignocellulose material while substantially maintaining cell structure; and heating the resultant at a temperature of 250 to 450.degree. C. or 350 to 400.degree. C. for a predetermined period of time; followed by predetermined cooling to form an oil sorbent. The device for continuously preparing an oil sorbent having such a basic structure that three pipes with a "ellipse-shaped" cross-section each of which includes therein a screw type transferring means are arranged on top of one another, and the heating and the cooling are effected externally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.