Title:
【発明の名称】化学―機械的及び/又は化学―熱―機械的木材パルプの製造
Document Type and Number:
Japanese Patent JPH05502480
Kind Code:
A
Abstract:
PCT No. PCT/EP90/01622 Sec. 371 Date May 18, 1992 Sec. 102(e) Date May 18, 1992 PCT Filed Sep. 25, 1990 PCT Pub. No. WO91/05102 PCT Pub. Date Apr. 18, 1991.In a process for manufacturing chemo-mechanical and/or chemothermal-mechanical wood pulps, raw materials containing lignocellulose, such as wood shavings, wood chips, pre-ground wood or sawdust, are first impregnated with an aqueous alcoholic SO2 solution and then heated to a temperature between 50 DEG and 170 DEG C. for a period of 1 to 300 minutes. The wood shavings are then ground to the desired degree of fineness in a defibrinating device. The process makes it possible to achieve up to 50% reduction in grinding energy in comparison with known chemothermal-mechanical processes.
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Inventors:
Pat, Rudolph
La call, georg
La call, georg
Application Number:
JP51359690A
Publication Date:
April 28, 1993
Filing Date:
September 25, 1990
Export Citation:
Assignee:
Ciutora Fuerutomiyure Actien Gezershaft
International Classes:
D21B1/16; D21C1/04; D21C3/20; D21B1/14; D21C3/22; (IPC1-7): D21B1/14; D21C3/20; D21C3/22
Attorney, Agent or Firm:
Toshio Yano (2 outside)