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Title
Environmentally friendly and cost-effective method for manufacturing absorbent grade paper
Authors
DHARM DUTT
Received
August 13, 2012
Published
Volume 47 Issue 9-10 October-December
Keywords
Eucalyptus tereticornis, veneer waste of poplar, pulping, semi-bleaching, oxygen delignification, cost
effectiveness, absorbent grade paper
Abstract
Absorbent paper is characterized by some of its important specific properties like water klemn, castor oil penetration
and wet strength. An absorbent grade pulp was manufactured from a mixture of Eucalyptus tereticornis and veneer
waste of poplar (15:85) by three distinct processes: (a) delignification at high alkali dose and longer cooking time (at
170 °C), followed by enzyme treatment (method-I), (b) delignification under normal pulping conditions, followed by
semi-bleaching (CEOP) (method-II), and (c) delignification under normal pulping conditions, followed by oxygen
treatment (method-III). Method-I required 7.15 h for pulp processing and the cost of pulp was US$ 2481.72/digester.
The cost of pulp produced by method-II was comparatively lower (US$ 2272.69/digester). However, it required a
longer time (9.45 h) and was not environmentally benign because of generation of chloro-organic compounds. The pulp
produced by method-III was environmentally friendly, required a cooking time of 12.45 h, and was also economical
(US$1936.32/digester), compared to the other methods.
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