Effects of Ethanol Addition and Biological Pretreatment on Soda Pulping of <i>Eulaliopsis binata</i>

Abstract

Morphological characteristics and proximate chemical analysis of E. binata showed it as a suitable raw material for writing and printing grade paper. Maximum pulp yield (43.58%) of kappa number 17.38 with 0.9% screening rejects was obtained at 12% of active alkali (as Na 2 O) pulping temperature 130˚C, cooking time 120 min and solid to liquor ratio 1:4. During bio-soda pulping of E. binata, pulp yield decreased slightly while pulp brightness, tensile index, burst index and double fold numbers were improved by 4.1%, 24.94%, 14.03% and 48.45% respectively compared to soda pulping. During ethanol-soda pulping of E. binata, pulp yield, pulp brightness, tensile index, burst index and double fold numbers were improved by 3.9%, 6.6%, 32.18%, 35.40% and 77.31% respectively compared to soda pulping.

Response surface methodology for optimization of cellulose extraction from banana stem using NaOH-EDTA for pulp and papermaking

“…It is known that the phenylpropane units in lignin were bonded by carbon-carbon (C–C) and ether (C–O–C) linkages. Cleavage of these linkages is fundamental for lignin removal since it produced low molecular and soluble lignin fragments ( Gautam et al., 2016 ). Hon and Shiraishi (2000) mentioned that ether linkages are readily cleaved as compared to the more stable C–C linkages.…”

Xylanase pretreatment of mechanically destructured chips of Eucalyptus tereticornis and its effect on kraft pulping

“…Therefore, an optimum active alkali of 15% gave a reasonable screened pulp yield with the minimum Kappa number and was selected as the optimum dose for the pulping of non-destructured wood chips of E. tereticornis. The screened pulp yield and Kappa number of the resultant pulp were controlled by the active alkali dose during kraft pulping (Gautam et al 2016). The kraft pulping process is an alkaline process that utilizes NaOH and Na2S as active chemicals in the white liquor for lignin degradation and the liberation of fibers.…”