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- W2232503570 abstract "In an attempt to develop pulping process suitable for small scale implementation, production of bleachable chemi-mechanical pulp from wheat straw was investigated. Four levels (10, 12, 14 and 16% based on oven dry weight of straw) NaOH and one pulping time of 40 minutes at 95C pulping temperature were used. After digester yield varied between 64.4 and 72.2% and the total yield after defibration was measured as 55.5% and 58.2%. Unrefined pulp freeness varied between 708 and 790 ml CSF. Pulps produced applying 10-16% NaOH, 40 minutes pulping time and 95C pulping temperature was selected from further evaluation. These pulps were refined to about 365 ml CSF in a PFI mill and then hand sheets were made for strength evaluation. The apparent density of the hand sheets varied between 430-489 kg/m, tear index between 6.51-7.11 mN.m/g, and tensile index between 29.2 -30.8 N.m/g. Significant difference at 99% was not observed between the strength of the pulps. Then pulp produced applying 10% NaOH, 40 minutes pulping time and 95C pulping temperature were selected for bleaching trials. Totally Chlorine Free (TCF) bleaching sequences was used for bleaching. Pulps bleached applying 4% H2O2 and 3.5% NaOH , 3% sodium Silicate, 0.5% MgSO4 and 0.3% DTPA for 2 hours showed the highest brightness of 50.69% compared to 29.2% for unbleached pulp." @default.
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- W2232503570 date "2012-01-01" @default.
- W2232503570 modified "2023-09-24" @default.
- W2232503570 title "INVESTIGATION ON PRODUCTION OF BLEACHABLE CHEMI-MECHANICAL PULP FROM WHEAT STRAW" @default.
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