Modified inorganic particles for deinking
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United States of America Patent
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Oct 16, 2012
Grant Date -
Jun 30, 2011
app pub date -
Jan 18, 2011
filing date -
Jan 9, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides methods for deinking printed waster paper—particularly methods that use a deinking composition that includes a hydrophobically-modified inorganic particle (“MIP”) to improve ink collection efficiency under traditional alkaline, reduced alkali, and true neutral deinking conditions. Deinking compositions are provided that include a hydrophobically-MIP substrate, a nonionic surfactant, and a fatty acid, or mixtures thereof. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentrations (“ERIC”) values.
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