La narcogangsterización de la música popular

Villar, Juan David Luján; Villar, Roberto Carlos Luján

doi:10.15332/rt.v0i12.2043

Cited by 1 publication

(1 citation statement)

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“…In fact, more lignin, and a high proportion of hemicellulose were lost in the pulping liquor during conventional industrial processes (Cruz et al 2012). The most labile fraction, the hemicellulose-lignin complex (containing approximately 15 to 25% of all lignin and 40% of all hemicellulose) was rapidly removed early in the process (Cenunez 2018;Villar 2018). The reference kraft pulp contained approximately 6.02% xylan.…”

Section: Autohydrolyzed Solids and Kraft Pulpingmentioning

confidence: 99%

Autohydrolysis, pulping, and bleaching of Eucalyptus urograndis in a biorefinery framework

Rodriguez

Colodette

García

et al. 2019

BioRes

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Autohydrolysis and kraft pulping were sequentially applied to Eucalyptus urograndis wood to obtain added-value products from hydrolysis liquor. A biorefinery approach was used to bleach the resulting solid phase containing the cellulose pulp with an optimized O–D–(EP)–D bleaching sequence, where O denotes delignification with the sequence D bleaching with chlorine dioxide and EP alkaline extraction with soda and hydrogen peroxide. The pulp was then beaten to obtain paper sheets. The two-stage process yielded pulp with a small Kappa number relative to conventional delignification (4.9 to 13.7 vs 17.1). Using autohydrolysis temperatures of 160 °C to 170 °C during 0 min to 15 min made the process selective towards the extraction of hemicelluloses (xylan up to 43.9%). Additionally, the Kappa number and brightness obtained after bleaching with an O-D-EP-D sequence were suitable for preparing dissolving grade pulp. The brightness of the pulp obtained was identical with that of the reference pulp (91.0%) and the Kappa number was smaller (0.2 to 0.6). Beating the pulp for 4500 PFI revolutions produced paper sheets with slightly better tensile strength and tear index than those for sheets from the reference pulp (viz., 90.3 N·m·g-1 and 9.9 mN·m²·g-1, respectively, versus 89.8 N·m·g-1 and 9.7 mN·m²·g-1, respectively).

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Section: Autohydrolyzed Solids and Kraft Pulpingmentioning

confidence: 99%