Waste paper treatment process

Details Waste paper treatment process Waste paper treatment process

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) C01F 11/18 (2006.01) C09C 1/02 (2006.01) D21F 1/82 (2006.01) D21H 17/01 (2006.01)

Patent

CA 2174018

A method of treating reject from a plant for de-inking waste paper which reject comprises a mixture of ink particles, inorganic particles and fibres includes the step of forming in an aqueous suspension or slurry comprising said reject a precipitate of a substantially white insoluble salt which entrains or aggregates ink particles, inorganic particles and fibres contained in said reject whereby the darkness of the reject is reduced by formation of the precipitate. The precipitate may comprise calcium carbonate formed by reacting carbon dioxide with calcium hydroxide in the said suspension. The precipitate and entrained or aggregate material therein may be separated for re-use as a particulate coating or filler material. The said product may be separated from water which after separation is clearer than when originally treated and is recycled for re-use. The said reject may be a slurry or sludge produced from a flotation process of a waste paper de- inking plant.

Affiliated with

Also associated with

Rating

Waste paper treatment process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Waste paper treatment process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Waste paper treatment process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1643047