Deinking waste paper using a polyglycol and a phosphoric ester m

Details Deinking waste paper using a polyglycol and a phosphoric ester m Deinking waste paper using a polyglycol and a phosphoric ester m

1991-10-30

1993-07-20

Hastings, Karen M.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 6, 162 8, D21C 502

Patent

active

052289532

ABSTRACT:
A process for the recovery of fibers by means of flotation de-inking of waste paper which bears ink applied by flexographic printing or xerography, by reducing the paper to fibers in an aqueous medium with the addition of bleaching chemicals and auxiliaries containing peroxide, fatty acids, complexing agent, sodium hydroxide, and an additive based on polyglycol and a phosphoric ester mixture, produces fibers which are free from ink, which are useful as a recyclable material.

REFERENCES:
patent: 3069308 (1962-12-01), Lissant
patent: 3635789 (1972-01-01), Green, Jr.
patent: 3846227 (1974-11-01), Mestetsky et al.
patent: 4276118 (1981-06-01), Quick
patent: 4487655 (1984-12-01), Noetzel
patent: 4561933 (1985-12-01), Wood et al.
patent: 4820379 (1989-04-01), Darlington

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