Bleaching Deinked Pulps, 1990 Pulping Conference Proceedings

While efficient fiber use has always been a hallmark of any pulp and paper operation, recent environmental and legislative pressures have necessitated serious consideration of use of recycled waste in newsprint production.

Since newsprint brightness demands have also increased bleaching deinked pulp has become very necessary. In this paper we examine a number of bleaching systems: sodium hydrosulfite (Y), formamidine sulfinic acid-FAS (YFAs), hydrogen peroxide (P) and PY on newsprint-magazine grade secondary fiber deinked by washed or flotation-washed systems. The study indicated that both hydrosulfite (Y) and two-stage PY technologies offer effective low cost technologies to bleach these pulps.

Author: Joachimides, T., Hache, M.
Bleaching Deinked Pulps, 1990 Pulping Conference Proceedings
Bleaching Deinked Pulps, 1990 Pulping Conference Proceedings
35.00

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