Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Treatment with particular chemical
Reexamination Certificate
2007-02-06
2007-02-06
Fortuna, José A. (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Treatment with particular chemical
C162S029000, C162S030110, C162S048000, C252S175000, C252S181000
Reexamination Certificate
active
10895589
ABSTRACT:
Compositions and method for improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or phosphonate blends is admixed with the aqueous digester composition in a chemical pulping process during the digestion stage. The compositions and method are especially well suited for use in the Kraft pulping process.
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Windhager, R.H., An Effective Sequestrant for Use in Controlling Digester Scale; Paper Trade Journal, pp. 42-44, Nov. 5, 1973.
Loy Jeremy E.
Severtson Steven John
Thompson Jacob Owen
Verrett Sheldon Phillip
Blackwell Sanders Peper Martin LLP
Fortuna Jos'e A.
Solutia Inc.
Wachter Mark F.
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