Modified Kaolin-Based Deinking Reagent for Recycled Paper, 2009 TAPPI Engineering, Pulping, Environmental Conference

Please Note: This document will be available in PDF format in the "My Electronic Documents" link on the home page once your order has been completed. Please make sure you have the latest version of Acrobat Reader. Click on the Acrobat Reader icon to check for the latest version, it’s FREE. To print a hardcopy of a PDF file correctly you must have a postscript printer. If you are not sure if your printer is a postscript printer please refer to your owner’s manual.

A deinking reagent based on modified kaolin has been developed for the deinking of recycled paper such as old newspaper, old magazine, mixed office waste, sorted office paper, etc. The very fine particle size of ink particles is one of the main causes for the relatively poor deinking of recycled paper. Due to the hydrophobicity of the modified kaolin particles and their relatively larger particle size, this deinking kaolin (DK) acts as a collector for these fine ink particles and results in improving the deinking process. Thus, the blend of the deinking kaolin with a deinking surfactant produces a deinking reagent that gives more efficient separation and removal of the ink particles from the recycled paper fibers. In addition, the resulting deinking reagent cost is lower since the DK replaces a portion of the more expensive deinking surfactant.