Pneumatic reactor ozone bleaching of paper pulp

Details Pneumatic reactor ozone bleaching of paper pulp Pneumatic reactor ozone bleaching of paper pulp

D - Textiles, Paper

21

C

D21C 3/04 (2006.01) D21C 9/10 (2006.01) D21C 9/153 (2006.01)

Patent

CA 2044907

ABSTRACT A method and apparatus for delignifying comminuted cellulosic fibrous material (paper pulp) with ozone. Pulp having a consistency of about 25-45% is fluffed, ozone is added to it, and then it is pneumatically conveyed in a pathway for at least several seconds (e.g. about four seconds). The majority of the gas is then separated from the pulp in a cyclone, and the pulp is discharged into a retention tube, where it is retained for at least a few seconds (e.g. about ten seconds) in a relatively static condition. It is then fed through an air lock to another blower, and additional ozone added to it, then the above steps are repeated. The gas separated from one cyclone can be returned as conveying gas to another blower. The method is practiced at a pH of about 1.8-3.5, and a temperature of about 20 to 50°C.

Affiliated with

Also associated with

Rating

Pneumatic reactor ozone bleaching of paper 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 Pneumatic reactor ozone bleaching of paper pulp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatic reactor ozone bleaching of paper pulp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2047692