Integration of hemicellulose pre-extraction in the bleach-grade pulp production process
Source abstract
Abstract
Loblolly pine woodchips were first pre-extracted with 6 wt% (percent on original nonextracted o.d. wood weight) sodium hydroxide at room temperature overnight, then treated at 90°C for 90 min, following another 4 h extraction with the addition of 5 wt% boric acid to partially remove hemicellulose. During the subsequent bleach-grade kraft pulping process, the cooking intensity was alleviated, either by decreasing the cooking time (reduced H-factor by 35%) or decreasing the chemical charge by 30%, with the objective of obtaining similar pulp quality as the control cook. After elemental chlorine free bleaching and PFI refining, the results indicated that the pre-extracted pulp could maintain equal or similar brightness and physical strength as the control pulp through this optimization of the pulping process.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Lignin and Wood Chemistry · Advanced Cellulose Research Studies · Biofuel production and bioconversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (27)
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