Paulownia as a raw material for the production of pulp by soda–anthraquinone cooking with or without previous autohydrolysis

García, Juan Carlos Figueroa; Zamudio, Minerva A.M.; Pérez, A.; Alva, Hugo E. de; López, Fátima

doi:10.1002/jctb.2563

Cited by 9 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Delignification was done using an NaOH/anthraquinone mixture under the following conditions: 20% NaOH on a dry matter basis; a reaction temperature and time of 171°C and 120 min, respectively; a solid/liquid ratio of 1/12 and an anthraquinone concentration of 0.1% . The process was performed in a 10 L MK‐SYSTEMS reactor.…”

Section: Methodsmentioning

confidence: 99%

“…This first, hydrolysis step should be performed under relatively mild conditions to avoid excessive degradation of cellulose fibres and be followed by delignification of the ensuing solid residue. Autohydrolysis is also possibly the most suitable choice for the integral fractionation of lignocellulosic biomass, as it provides dissolved hemicelluloses of potential use as food additives or in the production of furfural and polymers …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biorefinery of paulownia by autohydrolysis and soda‐anthraquinone delignification process. Characterization and application of lignin

Zamudio

Alfaro

Alva

et al. 2014

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

BACKGROUND Lignin is one of the most abundant polymers in nature. Its physical and chemical properties confer it a high potential for various uses including the production of thermoplastic matrices. This work characterized various types of lignin obtained by alkaline delignification of paulownia with soda–anthraquinone. The delignification process was carried out with or without previous autohydrolysis. The products obtained after evaporation or acidification were used to produce polylactic acid–lignin composites. RESULTS Subjecting the raw material to autohydrolysis prior to alkaline delignification provided a spent liquor (black liquor) containing an increased amount of extracted lignin (11.9% more than without autohydrolysis) and possessing a higher calorific value (14 822 kJ kg−1) than in the absence of an autohydrolysis stage. Thermogravimetric analysis revealed a strong impact of the autohydrolysis process, which provided residual delignification fractions containing abundant lignin and no degradation products of polysaccharides or other constituents of the raw material. Mechanical dynamics analysis of composites with lignin contents from 12.5 to 30% revealed an increased elastic (storage) modulus (E'). CONCLUSIONS Soda lignin has appropriate interaction with the polylactic acid, which allows it to be used for obtaining a composite with adequate physical strength characteristics. © 2014 Society of Chemical Industry

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biorefinery of paulownia by autohydrolysis and soda‐anthraquinone delignification process. Characterization and application of lignin

Zamudio

Alfaro

Alva

et al. 2014

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, these processes can also lead to serious environmental pollution (Zhao et al 2011). In recent years, many new or modified processes have been developed (Huang et al 2008;González-García et al 2010;Garcia et al 2011;Loacutepez et al 2011), but such approaches still cannot fundamentally solve the above problems.…”

Section: Introductionmentioning

confidence: 99%

The Structural Characterization of Corn Stalks Hemicelluloses During Active Oxygen Cooking as a Pretreatment for Biomass Conversion

Shi¹,

Yang²,

Lin³

et al. 2012

BioResources

View full text Add to dashboard Cite

Optimization of furfural production by acid hydrolysis of Eucalyptus globulus in two stages

López¹,

García

Feria³

et al. 2014

Chemical Engineering Journal

View full text Add to dashboard Cite

The aim of this study was to optimize the production of furfural by hydrolysis with dilute acid of Eucalyptus globulus wood in two stages, using a factorial experimental design and multiple regression models to maximize furfural yields. The two-stage process could provide a solid phase with less degraded cellulose and older applications that the solid phase of a conventional acid hydrolysis. The selectivity for furfural of the process was increased by effect of the glucan and lignin fractions being efficiently removed after the first acid hydrolysis stage.The operational ranges are especially suitable for the extraction of xylose, which was virtually quantitative at 170 ºC and virtually independent of the operation time. It is therefore advisable to use non-isothermal conditions or short times. This is quite important if one considers the low acid concentration used. The liquid phase obtained after autohydrolysis of the raw material under the optimum conditions contained 2.3% glucose, 9.8% xylose, 2.5% xylo-oligomers, 0.6% arabinose, 1.1% furfural and 0.1% 5-OH methyl furfural.After the residual solid from the first hydrolysis stage is removed, the acid concentration is the most influential variable on the conversion of xylo-oligomers or xylose into furfural. Conversions to furfural were quite substantial (greater than 10 g/L). Hemicelluloses in the raw material were extracted by 32-57.7% and xylan by 40.5-84%. The highest conversions to furfural were obtained by using a medium operation time (15 min) and low temperature (170 ºC) and pH=2.The process additionally provides hemicellulose derivatives that are scarcely contaminated with cellulose derivatives. The concentrations of gluco-oligomers were very low and those of glucose in the region of 3% of the raw material.Response to Reviewers: Optimization of furfural production by acid hydrolysis of Eucalyptus globulus in two stages. Ms. Ref. No.: CEJ-D-13-02942 LIST OF CHANGES Reviewers' comments:REVIEWER 1: The manuscript dealed with the furfural production from woody biomass. If the manuscript just focused on the optimization of two stage of furfural production, the novelty seems not enough. The authors were suggested to provide some evidences for advantages of two stage process as compared with single stage. In many parts, the writing hard to be understood. RESPONSE TO REVIEWER COMMENT:(*) The use of lignocellulosic biomass as a sustainable, renewable raw material for the production of chemicals and energy is steadily gaining interest. Despite the difficulties, especially as regards the need to fractionate its components in order to make the process cost-effective, there is increasing experimental evidence of its viability. For example, research has shown the possibility of obtaining ethanol as main product, but also that other structural components such as hemicelluloses and polyphenols (lignin) can be useful to obtain foods, pharmaceuticals, plastics, paper and basic chemicals, among others, by using a series of process known as "Biorefining". An ...

show abstract

Paulownia as a raw material for the production of pulp by soda–anthraquinone cooking with or without previous autohydrolysis

Cited by 9 publications

References 19 publications

Biorefinery of paulownia by autohydrolysis and soda‐anthraquinone delignification process. Characterization and application of lignin

Biorefinery of paulownia by autohydrolysis and soda‐anthraquinone delignification process. Characterization and application of lignin

The Structural Characterization of Corn Stalks Hemicelluloses During Active Oxygen Cooking as a Pretreatment for Biomass Conversion

Optimization of furfural production by acid hydrolysis of Eucalyptus globulus in two stages

Contact Info

Product

Resources

About