Method of producing peroxide bleached pulp

Details Method of producing peroxide bleached pulp Method of producing peroxide bleached pulp

1979-07-25

1981-06-02

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Simultaneous mechanical defibration and chemical treatment

162 28, 162 78, D21B 116

Patent

active

042709768

ABSTRACT:
Method of producing peroxide bleached pulp from fibrous lignocellulose materials which are subjected to a defibration step in a grinding space defined between a pair of discs which rotate relative to one another within a steam pressurized grinding housing. The pulp material is fed into the central portion or "eye" of the grinding space by a screw conveyor which rotates in a bore communicating with the grinding housing to form a steam-tight plug to prevent blow-back of pressurized steam from the grinding housing. The steam-tight plug, upon entry into the central portion of the grinding space, is broken up into fiber bundles which are accelerated radially outwards in the grinding space by the centrifugal force while being subjected to progressively increasing defibrating action. A peroxide-containing bleaching solution is introduced into the grinding space so as to react with the separated fibers of the pulp material during the defibrating action.

REFERENCES:
patent: 3388037 (1968-06-01), Asplund et al.
patent: 3467574 (1969-09-01), Wost
patent: 4065347 (1977-12-01), Aberg et al.
"The Asplund Defibrator", Brochure 1946, p. 4, 5, 1941.
Gavelin, Gunnar, "Pulp and Paper International", Jan. 1977.

Affiliated with

Also associated with

Rating

Method of producing peroxide bleached pulp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of producing peroxide bleached pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing peroxide bleached pulp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1863730