Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2009-02-24
2011-12-27
Fortuna, Ana (Department: 1777)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S650000, C210S638000, C210S749000, C430S284100
Reexamination Certificate
active
08083947
ABSTRACT:
Polymer-containing solution can be purified and the solvent reused by subjecting the solution to microfiltration using tubular filters having an average pore diameter of less than 1 μm and a filtration pressure of at least 0.35 MPa. This method is particularly useful for reclaiming and reusing solvents that are used in the development or chemical washout of flexographic printing plates.
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Ali M. Zaki
Bradford David C.
Eastman Kodak Company
Fortuna Ana
Tucker J. Lanny
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