TY - JOUR
T1 - Purification of syringaldehyde and vanillin from an oxidized industrial kraft liquor by chromatographic processes
AU - Mota, Inês Ferreira
AU - Pinto, Paula Rodrigues
AU - Loureiro, José Miguel
AU - Rodrigues, Alírio Egídio
N1 - Funding Information:
Inês Mota gratefully acknowledges her Ph.D. scholarship ( SFRH/BD/91582/2012 ) from Fundação para a Ciência e a Tecnologia (FCT). This work was financially supported by: Project POCI-01-0145-FEDER-006984 – Associate Laboratory LSRE-LCM funded by ERDF through COMPETE2020 – Programa Operacional Competitividade e Internacionalização (POCI) – and by national funds through FCT - Fundação para a Ciência e a Tecnologia and “AIProcMat@N2020 – Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020”, with the reference NORTE-01-0145-FEDER-000006, supported by Norte Portugal Regional Operational Programme ( NORTE 2020 ), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF).
Publisher Copyright:
© 2019 Elsevier B.V.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - In this study the purification of an oxidized industrial kraft liquor (IKL) by chromatographic processes is addressed after being submitted to a three stage membrane fractionation aiming the recovery of high added value phenolic monomers. The IKL final permeates obtained from the second and third membrane separation stages (P5kDa and P1kDa, respectively) were loaded onto a bed packed with nonpolar SP700 resin and were readily eluted with an ethanol:water (90:10, % V/V) solution. Each stream was characterized regarding the total non-volatile solids, ashes and total phenolic compounds of interest quantified by HPLC-UV. Maximum adsorption capacities for vanillin and syringaldehyde of 0.0797 and 0.0673 g g−1dry resin, respectively, were obtained after loading the P1kDa permeate. Cycle adsorption studies performed with P5kDa and P1kDa permeates showed that the SP700 resin can be reutilized up to 4–5 adsorption/desorption cycles and no major differences regarding the performance of the adsorption process were observed employing both permeates. Lastly, a final separation step of the ethanolic eluate by supercritical fluid chromatography (SFC) technology was successfully accomplished employing a silica column at 150 bar and 40 °C and a gradient of the co-solvent methanol.
AB - In this study the purification of an oxidized industrial kraft liquor (IKL) by chromatographic processes is addressed after being submitted to a three stage membrane fractionation aiming the recovery of high added value phenolic monomers. The IKL final permeates obtained from the second and third membrane separation stages (P5kDa and P1kDa, respectively) were loaded onto a bed packed with nonpolar SP700 resin and were readily eluted with an ethanol:water (90:10, % V/V) solution. Each stream was characterized regarding the total non-volatile solids, ashes and total phenolic compounds of interest quantified by HPLC-UV. Maximum adsorption capacities for vanillin and syringaldehyde of 0.0797 and 0.0673 g g−1dry resin, respectively, were obtained after loading the P1kDa permeate. Cycle adsorption studies performed with P5kDa and P1kDa permeates showed that the SP700 resin can be reutilized up to 4–5 adsorption/desorption cycles and no major differences regarding the performance of the adsorption process were observed employing both permeates. Lastly, a final separation step of the ethanolic eluate by supercritical fluid chromatography (SFC) technology was successfully accomplished employing a silica column at 150 bar and 40 °C and a gradient of the co-solvent methanol.
KW - Adsorption
KW - Biorefinery
KW - Oxidized lignin
KW - Phenolic monomers
KW - Supercritical fluid chromatography
UR - http://www.scopus.com/inward/record.url?scp=85072700962&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2019.116083
DO - 10.1016/j.seppur.2019.116083
M3 - Article
AN - SCOPUS:85072700962
SN - 1383-5866
VL - 234
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 116083
ER -