Method of cooking cellulose material and preserving the heat and terpentine content of the cooking liquor
US4274911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Jul 26, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of cooking cellulose material and effectively preserving the heat and terpentine content of the cooking liquor is disclosed. The cooking liquor is allowed to expand and the expansion steam (blow steam) is conveyed into a bed of cellulose material in a storage container (3', 3) to heat and impregnate the cellulose material before cooking. A heated zone is maintained in the bed of material below the surface of the bed by regulating the flow of expansion steam into the container. Uncondensed, evil-smelling and poisonous gases are at the same time prevented from flowing out into the atmosphere. These gases are drawn off from the storage container for destruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.