Title:
【発明の名称】クラフトパルプの製造方法
Document Type and Number:
Japanese Patent JP2900091
Kind Code:
B2
Abstract:
Processes for preparing kraft pulp are disclosed. The processes include pretreating cellulosic material or chips with spent cooking liquor at the temperature of about 20 to 100 DEG C, followed by heating the impregnated chips at the temperature of from about 120 to 180 DEG C, followed by digestion of the lignin with white liquor, which is facilitated by using this pretreatment process.
Inventors:
CHITSUKA PANU ORAUI
Application Number:
JP50375691A
Publication Date:
June 02, 1999
Filing Date:
February 11, 1991
Export Citation:
Assignee:
SANZU DEFUIBUREETAA RAUMA OY
International Classes:
D21C1/06; D21C3/02; D21C1/00; D21C11/00; (IPC1-7): D21C3/02; D21C1/00
Domestic Patent References:
| JP57176282A | ||||
| JP4611441B2 |
Other References:
【文献】米国特許2639987(US,A)
Attorney, Agent or Firm:
Nobuo Kaida (1 person outside)