Process for deinking waste paper

Details Process for deinking waste paper Process for deinking waste paper

2005-06-16

2010-06-08

Halpern, Mark (Department: 1791)

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

C162S006000, C162S008000, C162S013000, C162S072000

Reexamination Certificate

active

07731818

ABSTRACT:
The present invention relates to a process for deinking waste paper comprising treating the waste paper with a peroxide compound in an aqueous alkaline medium in the presence of a first polymer (A) comprising a Ca-binding polymer in the form of a polycarboxylate polymer and a second polymer (B) comprising a poly-alfa-hydroxyacrylic acid or a salt thereof or the corresponding polylactone, said process additionally comprising treating the waste paper with at least one non-ionic surfactant or with at least one combination of a non-ionic surfactant and a fatty acid or a salt thereof to promote ink detachment and/or ink removal.

REFERENCES:
patent: 4347099 (1982-08-01), De Ceuster et al.
patent: 5637191 (1997-06-01), Langley et al.
patent: 5660684 (1997-08-01), Li et al.
patent: 6784146 (2004-08-01), Luo et al.
patent: 0708199 (1996-04-01), None
patent: 0814193 (1997-12-01), None
patent: 9608598 (1996-03-01), None
patent: 2004063276 (2004-07-01), None
patent: 2004063461 (2004-07-01), None
patent: 2005047594 (2005-05-01), None
Search Report for Finnish Application No. FI20040833.
International Search Report; International Application No. PCT/FI2005/000283.
Written Opinion for International Application No. PCT/FI2005/000283.
U.S. Appl. No. 10/541,775 filed Mar. 10, 2006.

Affiliated with

Also associated with

Rating

Process for deinking waste paper does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4249309