Pulping process pretreatment using a lower alkanolamine in the p

Details Pulping process pretreatment using a lower alkanolamine in the p Pulping process pretreatment using a lower alkanolamine in the p

1983-09-29

1985-11-12

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Continuous chemical treatment or continuous charging or...

162 72, 162 84, 162 90, D21C 106, D21C 306, D21C 320

Patent

active

045526168

ABSTRACT:
An improved pulping process for producing high yield pulps from woody lignocellulosic material wherein the lignocellulosic material is treated with a pulping chemical and mechanically defibrated. The improvement comprises pre-treating the lignocellulosic material by impregnating same with a loweralkanolamine so as to cause softening of lignin in the material and to promote fiber separation. As a result, pulping chemical and refining energy consumption as well as vapor and liquid effluent pollution are significantly reduced.

REFERENCES:
patent: 2218479 (1940-10-01), Peterson
patent: 3773611 (1973-11-01), Worster et al.
patent: 4091749 (1978-05-01), Procter et al.
patent: 4397712 (1983-08-01), Gordy
Rydholm; "Pulping Processes; Interscience Publishers; N.Y., 1967, pp. 426-427.

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