Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With testing – sampling or analyzing
Reexamination Certificate
2006-07-11
2006-07-11
Griffin, Steven P. (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With testing, sampling or analyzing
C162S004000, C162S062000
Reexamination Certificate
active
07074299
ABSTRACT:
A method of processing papermaking fiber includes characterizing the initial color of the pulp and the color of the pulp after treatment with a phloroglucinol stain. The color response of the pulp to the stain has been found to be a better indicator of processing needs for secondary pulps in particular and in any event is selective for untreated groundwood as opposed to conventional groundwood identification methods. The color difference is used to target a suitable product for the pulp, to aid in bleaching/deinking strategy or to enable optimization of fiber blending for particular products. In a preferred embodiment the process includes determining changes in CIE L*, a*, b* and brightness values before and after staining of the pulp.
REFERENCES:
patent: 5013404 (1991-05-01), Christiansen et al.
patent: 5562803 (1996-10-01), Wang et al.
patent: 5672247 (1997-09-01), Pangalos et al.
patent: 5736004 (1998-04-01), Pangalos et al.
patent: 5755926 (1998-05-01), Hankins et al.
patent: 5883233 (1999-03-01), Catlin et al.
patent: RE36424 (1999-12-01), Clement
patent: 6010593 (2000-01-01), Eymin Petot Tourtollet et al.
patent: 6019872 (2000-02-01), Kurrle
patent: 6153300 (2000-11-01), Stromberg et al.
patent: 6273994 (2001-08-01), Creber et al.
Chou Henry
Clausing Robert J.
DiPietro David J.
Keen Stephanie
Palm Andrew C.
Ferrell Michael W.
Fort James Corporation
Griffin Steven P.
Kinney Anna L.
LandOfFree
Process for using a phloroglucinol color delta to control... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for using a phloroglucinol color delta to control..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for using a phloroglucinol color delta to control... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3563958