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Whole corn stover, without depithing, was subjected to conventional soda and soda-AQ pulping trials, followed by TCF bleaching. The same stover was also pulped and bleached using EAZP, a patented four-stage process developed for pith-containing nonwoods. The fully-bleached pulps from the EAZP process had superior freeness compared to those from the conventional processes. Tensile strength, smoothness, and opacity for the EAZP pulps were comparable to those for hardwoods, while tearing strength was lower. The EAZP pulps were easier to refine than hardwood pulps.
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Available for Purchase – Conference Proceedings
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A Simplified Pulping & Bleaching Process for Pith-Containing Nonwoods: Trials on Whole Corn Stalks,