Invention Grant
- Patent Title: Method for removing ink from paper
- Patent Title (中): 从纸上清除墨水的方法
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Application No.: US13578680Application Date: 2011-02-11
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Publication No.: US09587350B2Publication Date: 2017-03-07
- Inventor: Robert Daniel Haynes , Scott Barton Auger
- Applicant: Robert Daniel Haynes , Scott Barton Auger
- Applicant Address: FI Helsinki
- Assignee: KEMIRA OYJ
- Current Assignee: KEMIRA OYJ
- Current Assignee Address: FI Helsinki
- Agency: Berggren Inc.
- Priority: EP10164835 20100306
- International Application: PCT/US2011/024501 WO 20110211
- International Announcement: WO2011/100530 WO 20110818
- Main IPC: D21C5/02
- IPC: D21C5/02 ; D21C5/00

Abstract:
A method for removing ink from printed paper comprising: (a) pulping printed paper at least 25 wt % of which is old newsprint at a consistency of at least about 3% to obtain a pulp slurry; (b) treating the pulp slurry with an ink removing system, which system comprises: (i) a combination of lipase and at least one second enzyme chosen from amylase, xylanase or cellulase, and (ii) a non-ionic surfactant, in amounts effective to release ink from said pulp slurry, wherein the lipase is present in an amount of at least about 0.001 wt % based on the dry content of the pulp slurry and the ratio of the at least one second enzyme:lipase is at least about 1.2:1; and (c) separating the released ink from the pulp slurry, wherein the treating step is carried out prior to a deinking flotation stage.
Public/Granted literature
- US20120305206A1 METHOD FOR REMOVING INK FROM PAPER Public/Granted day:2012-12-06
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