Process for recycling and reconstituting flexographic inks

Details Process for recycling and reconstituting flexographic inks Process for recycling and reconstituting flexographic inks

1990-10-24

1991-05-21

Jones, W. Gary

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210641, 210650, 210651, 210652, 101366, B01D 6158

Patent

active

050172913

ABSTRACT:
A process for recycling and reconstituting flexographic inks from wash water resulting from cleaning the rollers and other components of a flexographic printing press. The process includes the steps of circulating the wash water through a cross-flow ultrafilter to separate an optically-clear filtrate from a first concentrate containing suspended ink solids, bacteria, and macromolecules. Thereafter, the filtrate is directed through a reverse-osmosis filter to separate from the filtrate a second concentrate containing dissolved ink components and the remaining bacteria. The first and second concentrates are then combined together with a compatible biocidal agent to form a stable, biologically-inactive additive that is mixed with fresh ink concentrate to form pressready flexographic printing ink.

REFERENCES:
patent: 3896730 (1975-07-01), Garrett et al.
patent: 4000065 (1976-12-01), Ladha et al.
patent: 4165288 (1979-08-01), Teed et al.
patent: 4391638 (1983-07-01), Fusco et al.
patent: 4563638 (1986-01-01), Zucker
patent: 4808237 (1989-02-01), McCormick et al.
patent: 4818284 (1989-04-01), McKelvey
Reduction of Fluorine Waste and Reclamation of Water (IBM Tech. Discl. Bul., vol. 19, No. 8, Jan. 1977, pp. 3016-3017.

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