Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Chemical treatment after start or completion of mechanical...
Reexamination Certificate
2007-06-12
2007-06-12
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Chemical treatment after start or completion of mechanical...
C162S017000, C162S025000, C162S082000
Reexamination Certificate
active
11121217
ABSTRACT:
A method to enhance brightness in Chemical and Mechanical pulps comprising adding an organic sulfide chelant is described and claimed.A method to enhance delignification in a Chemical pulp comprising adding an organic sulfide chelant is also described and claimed.
REFERENCES:
patent: 4578148 (1986-03-01), Lindahl
patent: 4599138 (1986-07-01), Lindahl
patent: 5164095 (1992-11-01), Sparapany et al.
patent: 5328599 (1994-07-01), Siefert et al.
patent: 5346627 (1994-09-01), Siefert et al.
patent: 5401420 (1995-03-01), Siefert et al.
patent: 6030495 (2000-02-01), Wan et al.
patent: 6242245 (2001-06-01), Amann et al.
patent: 6254724 (2001-07-01), Seltzer et al.
patent: 6267844 (2001-07-01), Jackson
patent: 1174810 (1984-09-01), None
patent: 1193053 (1985-09-01), None
patent: 05302288 (1993-11-01), None
Duggirala Prasad Y.
Salmen Kristine S.
Shevchenko Sergey M.
Breininger Thomas M.
DiMattia Peter A.
Edel John B.
Hug Eric
Martin Michael B.
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