000949 Jahan M S;Rubaiyat A;Sabina R (Pulp and Paper Research Div, BCSIR Laboratories, Dhaka, Dr Qudrat-I-Khuda Road, Dhaka 1205, Bangladesh, Email: firstname.lastname@example.org) : Evalution of cooking processes for Trema orientalis pulping. J scient ind Res 2007, 66(10), 853-9.
Chemical and morphological properties support Trema orienlalis as a new source for pulping (yield. 46-52%). Using soda, soda-anthraquinone (AQ), kraft, alkaline-sulfite-anthraquinone-methanol (ASAM), acetic acid (AA) and formic acid (FA) pulping processes. ASAM pulp (yield, 51.7 %; kappa number. 13.4) showed excellent initial brightness (53.2 %), which indicated better bleachability. Prebleaching of pulps by oxygen, peroxyaid and xylanase treatments, indicated O2-prebleaching reduced kappa number (44-53%). Prebleached pulps were bleached in Chlorine dioxide-Extraction-Chlorine dioxide (DED) and Chelation-Peroxie-Peroxide (QPP) bleaching sequences. ASAM and kraft pulps exhibited better brightness than soda-AQ pulp. Viscosity of bleached pulp from kraft process was lower than that of soda-AQ and ASAM processes. Strength properties of pulps from soda, soda-AQ, kraft and ASAM processes were acceptable. The a-cellulose (> 94 %) in FA pulp suggests further study for dissolving pulp.
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