Title:
【発明の名称】リグノセルロース材料を酸素パルプ化し、そしてパルプ化用化学薬品を回収する方法
Document Type and Number:
Japanese Patent JP2002536563
Kind Code:
A
Abstract:
A substantially sulfur free process for the manufacturing of a chemical pulp with an integrated recovery system for recovery of pulping chemicals is carried out on in several stages involving physical and chemical treatment of lignocellulosic material in order to increase accessibility of the lignocellulosic material to reactions with an oxygen-based delignification agent. Spent cellulose liquor comprising lignin components and spent chemical reagents is fully or partially oxidized in a gas generator wherein a stream of hot raw gas and a stream of alkaline chemicals and chemical reagents is formed for subsequent recycle and reuse in the pulp manufacturing process.
Inventors:
Stigson, Lars
Application Number:
JP2000598702A
Publication Date:
October 29, 2002
Filing Date:
February 14, 2000
Export Citation:
Assignee:
Kiram Activola Get
International Classes:
D21C1/06; D21C1/08; D21C1/10; D21C3/00; D21C3/02; D21C3/22; D21C3/26; D21C9/147; D21C11/00; D21C11/12; (IPC1-7): D21C3/00; D21C11/00
Domestic Patent References:
| JPS4892604A | 1973-12-01 | |||
| JPS5024502A | 1975-03-15 | |||
| JPS5545888A | 1980-03-31 | |||
| JPS57191389A | 1982-11-25 | |||
| JPS4875801A | 1973-10-12 | |||
| JPS53139803A | 1978-12-06 |
Attorney, Agent or Firm:
Akira Asamura (3 outside)