Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2011-05-10
2011-05-10
Halpern, Mark (Department: 1741)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S158000
Reexamination Certificate
active
07938934
ABSTRACT:
The invention provides a method and apparatus for optimally feeding an ASA emulsion into a papermaking process. An intense transmission of ultrasonic energy rapidly and efficiently forms an ASA emulsion. Nearly simultaneous to forming the emulsion, the emulsion is fed into a high-speed dual conduit feeding apparatus, which quickly mixes the ASA emulsion with other chemicals and feeds the mixture directly into a papermaking process. The invention operates so fast that virtually no hydrolysis of the ASA occurs. This both prevents damage to the papermaking machinery and improves the quality of the produced paper. The invention operates 10-20 times faster than mechanical based emulsion methods and requires 1/7 as much energy to operate. The invention also self-monitors the process and can automatically correct any detected problems with the fed ASA emulsion.
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Kenneth S. Suslick, The Chemical Effects of Ultasound,Scientific American, Feb. 1989, p. 80-86.
Jacobson Tommy
Todorovic Aleksandar
Carlsen Benjamin E.
Halpern Mark
Martin Michael B.
Nalco Company
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