Invention Grant
- Patent Title: Method for deinking pulp using premixed hydrophobically modified calcium carbonate particles
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Application No.: US12087352Application Date: 2007-01-08
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Publication No.: US07897010B2Publication Date: 2011-03-01
- Inventor: Scott Rosencrance , Charles M. Ngome , Kevin M. Hale
- Applicant: Scott Rosencrance , Charles M. Ngome , Kevin M. Hale
- Applicant Address: US GA Kennesaw
- Assignee: Kemira Chemicals, Inc.
- Current Assignee: Kemira Chemicals, Inc.
- Current Assignee Address: US GA Kennesaw
- International Application: PCT/US2007/000473 WO 20070108
- International Announcement: WO2007/081921 WO 20070719
- Main IPC: D21C5/02
- IPC: D21C5/02

Abstract:
The present invention provides methods for deinking printed waste 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.
Public/Granted literature
- US20090165967A1 Use of Modified Inorganic Particles in Deinking Public/Granted day:2009-07-02
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