Ppg Industries, Inc.

Basf Corporation

Chin Li

Bhima R Vijayendran

David A Longhini

Kevin Hipolit

Bhima R Vijayendrar

Describes flotation deinking of secondary fiber using a froth moderating agent, a composition of the froth moderating agent with flotation deinking chemicals, and reducing the amount of stickies in separated seconday fiber. The froth moderating agent is selected from the group consisting of:

Froth moderating agent for controlling froth and reducing stickies in

Describes a deinking agent composition and a method for deinking wastepaper printed with electrostatic ink or mixtures thereof with wastepaper printed with impact ink in which a combination of nonionic surfactants are added to an alkaline slurry of paper fibers. The surfactants are a first nonionic surfactant represented by the formula:

Method for deinking electrostatic printed wastepaper using a combination

Describes flotation deinking of secondary fiber using a froth moderating agent, a composition of the froth moderating agent with flotation deinking chemicals, and reducing the amount of stickies in separated secondary fiber. The froth moderating agent is selected from the group consisting of:

Method for controlling froth and reducing stickies in the flotation

Describes a composition for use in flotation deinking of secondary fiber containing electrostatic ink and/or stickies and optionally conventional impact ink. The composition consists essentially of displector deinking chemicals having an HLB value greater than 10 and non-ionic surfactant deinking additives such as (i) capped aliphatic and alicyclic alkoxylates, e.g., chloride capped C.sub.5 -C.sub.20 alkyl ethoxylates, (ii) alkyl phenol ethoxylates, e.g., octyl phenol ethoxylates, and (iii) a combination of (i) and (ii). Also described is a method for using the composition in a deinking process that includes a flotation step.

Deinking electrostatic waste paper

A deinking composition comprises a synergistic combination of a first nonionic surfactant material represented by the formula:

Deinking agent of nonionic surfactants

Describes a method for deinking wastepaper printed with electrostatic ink or mixtures thereof with wastepaper printed with impact ink in which a combination of nonionic surfactants are added to an alkaline slurry of the paper fibers. The surfactants are a first nonionic surfactant represented by the formula,

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Murrysville, PA, United States of America

Chin Li