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The main challenges in the conversion of a paper-grade pulp and producing dissolving-grade pulp are the selective removal of hemicelluloses and the high pulp reactivity ([13]; [24]; Kopck 2010; [25]; [33]). Dissolving pulps are chemically refined bleached pulps that exhibit high cellulose content (over 90%) with advantageous properties such as high purity, high brightness, uniform molecular mass distribution and high cellulose reactivity, which represents a significant niche in the pulp industry ([24]; [25]; [26]; [35]; [43]). Keywords: bagasse soda pulp; cold caustic extraction; dissolving pulp; IONCELL-P(ulp); xylanase EN bagasse soda pulp cold caustic extraction dissolving pulp IONCELL-P(ulp) xylanase 473 483 11 05/09/22 20220501 NES 220501 1 Introduction Human dependence on petroleum-based products has raised concerns due to the negative impacts on the environment. [Extracted from the article]

Recent years have witnessed an increasing interest in man-made cellulosic fibers, whose production generally requires cellulose dissolution and regeneration. Cellulosic fibers are difficult to dissolve. Thus, the recalcitrance of wood pulp can be an estimate of its reactivity. Pulp reactivity is usually assessed via complex and time-consuming laboratory simulations of the viscose process. This study proposes a faster and more convenient approach. The dissolution-based torque reactivity (DTR) test measures the evolution of the rheological properties of a pulp suspension under dissolution in cupriethylenediamine. Reactivity is quantified in terms of initial dissolution rates (IDR) and dissolution times (DT). This study describes the measurement protocol for the DTR test and its application to some commercial pulps and a series of pulps hornified to different extents. The IDR and DT values were compared with other pulp features, including degree of polymerization, molecular weight distribution, specific surface area and water retention value. The DTR test proved to be reasonably precise and fast to carry out. [ABSTRACT FROM AUTHOR]