Abstract: An injector assembly that forms means for gasifying a slurry by expanding the infeed bore within the injector assembly having a source of ambient air in communication therewith whereby the negative pressure created draws air into the slurry prior to injection into a flotation cell whereupon the contaminants within the slurry combine with the air bubbles forming a foam at the surface of the cell that is passively directed into a reject nozzle leaving a decontaminated slurry, known as the accept, which is channeled therefrom for further processing.

Abstract: Disclosed is an open flotation de-inking module for recycled paper comprised of a flotation cell having an injector module and air control module used in conjunction to infuse micro air bubbles into pulp slurry to optimize the process of separating ink, clay, stickies and other float able contaminants from the recycled pulp slurry by negatively pressurizing the slurry as it accelerates through the injector drawing air from the air control module saturating the slurry with air bubbles before injection into the flotation cell whereupon the contaminants will adhere to the bubbles as they move to the surface forming a foam that is passively skimmed into reject compartments with the decontaminated pulp channeled from the floatation cell for further processing.

Abstract: Disclosed is a closed floatation conventional de-inking process adopted in the recycled paper processing plants, in which, ink separation and removal constitutes a major task. The specific concerns of this invention are the concept and the equipment for the separation and removal of the ink and ash from the pulp slurry contaminated with ink, clay and stickies.

Abstract: A process is disclosed for deinking pulp which has been made from paper printed with oil based ink. The process uses a surfactant component with and at least one alkoxylated diamine selected from Formula I: ##STR1## where X, Y, W and Z may be alike or different and are each independently selected from the group consisting of(i) --(CH.sub.2 --CH(CH.sub.3)--O).sub.a (CH.sub.2 --CH.sub.2 --O).sub.b --;(ii) --(CH.sub.2 --CH.sub.2)--O).sub.c (CH.sub.2 --CH(CH.sub.3)--O).sub.d --; and(iii) random copolymers of ethylene oxide and propylene oxide,wherein a, b, c and d are each selected independently to be a number between 1 and 30 so as to give an HLB value between 5-15.

Abstract: A process is disclosed for deinking pulp which has been made from paper printed with flexographic ink. The process uses a surfactant component made from a fatty acid or a fatty acid blend and at least one alkoxylated diamine selected from Formula I: ##STR1## where X, Y, W and Z may be alike or different and are each independently selected from the group consisting of(i) --(CH.sub.2 --CH(CH.sub.3)--O).sub.a (CH.sub.2 --CH.sub.2 --O).sub.b --;(ii) --(CH.sub.2 --CH.sub.2)--O).sub.c (CH.sub.2 --CH(CH.sub.3)--O).sub.d --; and(iii) random copolymers of ethylene oxide and propylene oxide,wherein a, b, c and d are each selected independently to be a number between 1 and 30 so as to give an HLB value between 5-15.