Paper making and fiber liberation – Processes and products – Utilizing non-aqueous suspending medium
Reexamination Certificate
2006-10-03
2006-10-03
Griffin, Steven P. (Department: 1731)
Paper making and fiber liberation
Processes and products
Utilizing non-aqueous suspending medium
C162S009000, C162S157600, C536S056000, C106S217500, C264S349000, C366S009000, C366S079000, C366S083000, C366S091000, C366S137100, C366S178100, C366S178200, C366S178300, C366S271000, C366S341000
Reexamination Certificate
active
07115187
ABSTRACT:
The invention relates to a method for continually producing a suspension of cellulose in an aqueous tertiary amine oxide. The method includes (a) mixing cellulose and an amine oxide-free aqueous phase to form a cellulose suspension in a mass ratio in the range of 1:3 to 1:40, (b) dehydrating the cellulose suspension, wherein the dehydrated cellulose suspension has a cellulose content in the range of 20 to 80 percent-by-mass; (c) mixing the cellulose suspension with an aqueous amine oxide while the cellulose suspension is falling through a vertical fall zone to obtain an aqueous amine oxide-cellulose suspension with an amine oxide content in the range of 70 to 80 percent-by-mass; and (d) conveying the aqueous amine oxide-cellulose suspension through a horizontal shear zone. The invention also relates to a device for carrying out this method.
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U.S. Appl. No. 10/088,773, filed Jun. 2002, Bauer et al.
Bauer Ralf-Uwe
Kind MUwe
Alceru Schwarza GmbH
Griffin Steven P.
Hultquist Steven J.
Intellectual Property / Technology Law
Kinney Anna L.
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