Method for recovering binder resin from ink ribbon, method for r

Details Method for recovering binder resin from ink ribbon, method for r Method for recovering binder resin from ink ribbon, method for r

1996-10-08

1998-07-14

Cameron, Erma

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210634, 210917, 134 15, 134 26, 134 38, 252364, 422261, 510174, B01D 1102

Patent

active

057799091

ABSTRACT:
Disclosed herein is a method for recovering binder resin from the ink layer of ink ribbon, said method comprising collecting ink ribbon having an ink layer consisting of dye and binder resin, dissolving the ink layer of ink ribbon in a solvent in which dye and binder resin are soluble, freeing the resulting solution of insoluble matter, concentrating the solution, pouring the resulting concentrate into a solvent in which dye is soluble but binder resin is substantially insoluble, thereby precipitating binder resin, and separating and drying precipitates. By concentrating the solution remaining after precipitation of binder resin and drying the concentrate, it is possible to recover dye. Disclosed also herein is an apparatus for recovering dye and binder resin according to said method.

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