Medium consistency ozone bleaching

Details Medium consistency ozone bleaching Medium consistency ozone bleaching

D - Textiles, Paper

21

C

D21C 9/153 (2006.01)

Patent

CA 2065574

14 ABSTRACT In a method of bleaching medium consistency pulp with ozone using a mixer, ozone containing gas and about 6-15% consistency pulp are fed to the mixer, and then discharged in a first, preferably vertical, path. The mixture of pulp and ozone moves in a first part of the vertical path a time period of about 1-5 seconds at a velocity of about 1-5 m/s so that the gas and pulp do not separate during movement in this first part, and the vast majority of the pulp brightening reaction between the ozone and pulp takes place. This is preferably accomplished by passing the mixture upwardly in a small diameter conduit having a height of about 3-20 meters. Then the velocity of the pulp is slowed while still moving in the first path, preferably by feeding it directly to a much larger diameter (e. g. 1.5-10 times) conduit, so the height of the unit may be kept under 100 feet. The pulp flows in the large diameter conduit for about 0.5-5 minutes so that residual reactions take place.

Affiliated with

Also associated with

Rating

Medium consistency ozone bleaching does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Medium consistency ozone bleaching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medium consistency ozone bleaching will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1967108