Xerographics deinking

Details Xerographics deinking Xerographics deinking

1985-04-15

1985-12-31

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 55, D21B 502

Patent

active

045619336

ABSTRACT:
A process for the deinking of xerographically printed wastepaper to produce reclaimed stock having high brightness and low dirt count. The process centers upon contact between a wastepaper pulp and an aqueous medium of alkaline pH containing a deinking agent consisting of a mixture of one or more C.sub.5 to C.sub.20 alkanols with nonionic surfactant to form a suspension of the ink in the aqueous medium. The deinking agent suitable for practice of the invention necessarily contains for every 10 parts by weight between 3 and 5 parts of alkanol and between 5 and 7 parts of nonionic surfactant, and is present in the aqueous medium in an amount between about 0.2 and 2.0 percent by weight, calculated on the dry weight of the pulp.

REFERENCES:
patent: 4162186 (1979-07-01), Wood et al.
patent: 4276118 (1981-06-01), Quick

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