Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1979-04-02
1982-10-26
Smith, William F.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 6, 162 76, D21C 502
Patent
active
043560580
ABSTRACT:
Papers containing dye substances in microencapsulated form are reprocessed by dissolving the papers in a pulper in the presence of chemical collectors and/or dispersing agents and in a neutral pH range and then feeding the dissolved pulp to the flotation or washing zone for the addition of a bleaching agent.
REFERENCES:
patent: 1799601 (1931-04-01), Neumann
patent: 3248277 (1966-04-01), Gartner et al.
patent: 3933578 (1976-01-01), Kasugai et al.
Fischer Siegbert
Pfalzer Lothar
J. M. Voith GmbH
Smith William F.
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