J
Juan C. Villar
Researcher at Center for International Forestry Research
Publications - 55
Citations - 1477
Juan C. Villar is an academic researcher from Center for International Forestry Research. The author has contributed to research in topics: Pulp (paper) & Kraft process. The author has an hindex of 20, co-authored 53 publications receiving 1250 citations. Previous affiliations of Juan C. Villar include Complutense University of Madrid.
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Oxidation of hardwood kraft-lignin to phenolic derivatives with oxygen as oxidant
TL;DR: In this article, a hardwood kraft lignin was oxidized in alkaline medium to obtain phenolic compounds (syringaldehyde, vanillin and its acids) and the effect of temperature, reaction time, oxygen pressure, alkali concentration and catalyst on yield and product distribution were studied.
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Lignin changes after steam explosion and laccase-mediator treatment of eucalyptus wood chips.
Raquel Martín-Sampedro,Ewellyn A. Capanema,Ingrid Hoeger,Juan C. Villar,Orlando J. Rojas,Orlando J. Rojas +5 more
TL;DR: Thermogravimetic analyses of whole meal obtained from chips before and after steam explosion indicated an increase in lignin degradation temperature due to lignIn condensation, and application of LMS treatment caused a reduction in lIGNin and polysaccharide degradation temperatures.
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Characterization of purified bacterial cellulose focused on its use on paper restoration.
Sara M. Santos,José M. Carbajo,Ester Quintana,David Ibarra,Nuria Gómez,Miguel Ladero,M. Eugenia Eugenio,Juan C. Villar +7 more
TL;DR: Results showed that BC has got high crystallinity index, low internal porosity, good mechanical properties and high stability over time, especially when purified by the alkaline treatment, which makes BC an adequate candidate for degraded paper reinforcement.
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Integration of a kraft pulping mill into a forest biorefinery: pre-extraction of hemicellulose by steam explosion versus steam treatment.
TL;DR: Although both pre-treatments increased delignification during pulping, steam explosion was significantly better than other options, and similar reductions in paper strength were found regardless of the type of treatment and conditions assayed, which is attributed to the increase of curled and kinked fibers.
Journal ArticleDOI
Oxidation of Hardwood Kraft-Lignin to Phenolic Derivatives. Nitrobenzene and Copper Oxide as Oxidants
TL;DR: In this paper, a hardwood kraft lignin was oxidized in an alkaline medium to obtain phenolic compounds (syringaldehyde, vanillin, syringic acid and vanillic acid).