Integrated Process for Vanillin and Syringaldehyde Production from Kraft Lignin

Rodrigues, Alírio E.; Pinto, Paula Cristina de Oliveira Rodrigues; Barreiro, M.F.; Costa, Carina Andreia Esteves da; Mota, Maria Inês Ferreira da; Fernandes, Isabel P.

doi:10.1007/978-3-319-99313-3_2

Cited by 3 publications

(4 citation statements)

References 66 publications

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“…The Norwegian company Borregaard has been producing vanillin from lignin extracted by the lignosulfonate pulping process for more than 50 years and is currently the only company producing vanillin with this method, together with other lignin‐based performance chemicals. [ 41 , 43 ]…”

Section: Oxidative Valorization Of Ligninmentioning

confidence: 99%

“…These compounds are usually di‐functional, and include aromatic aldehydes (i. e., vanillin and syringaldehyde), their respective aromatic acids (vanillic and syringic acids), and ketones (acetovanillone and acetosyringone). [ 42 , 43 ] The chemical and physical similarities between these aromatic monomers (i. e., their molecular weight, acid dissociation constant, density, and melting point) affect their separation from the oxidized lignin mixture and their consequent purification process. [97] …”

Section: Oxidative Valorization Of Ligninmentioning

confidence: 99%

“…The two major problems cited in this field are the acidification of the mixture and the removal of the residual lignin in solution. [43] One of the traditional processes for the production of vanillin from waste sulfite pulp liquor involves acidification of the oxidized medium for lignin precipitation, extraction of the aromatics of interest with volatile organic solvents, and further purification. [42] However, this sequence of processes requires high volumes of chemicals and solvents, and the mixture obtained remains difficult to purify.…”

Section: Oxidative Valorization Of Ligninmentioning

confidence: 99%

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On the Oxidative Valorization of Lignin to High‐Value Chemicals: A Critical Review of Opportunities and Challenges

et al. 2022

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The efficient valorization of lignin is crucial if we are to replace current petroleum‐based feedstock and establish more sustainable and competitive lignocellulosic biorefineries. Pulp and paper mills and second‐generation biorefineries produce large quantities of low‐value technical lignin as a by‐product, which is often combusted on‐site for energy recovery. This Review focuses on the conversion of technical lignins by oxidative depolymerization employing heterogeneous catalysts. It scrutinizes the current literature describing the use of various heterogeneous catalysts in the oxidative depolymerization of lignin and includes a comparison of the methods, catalyst loadings, reaction media, and types of catalyst applied, as well as the reaction products and yields. Furthermore, current techniques for the determination of product yields and product recovery are discussed. Finally, challenges and suggestions for future approaches are outlined.

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Section: Oxidative Valorization Of Ligninmentioning

confidence: 99%

Section: Oxidative Valorization Of Ligninmentioning

confidence: 99%

Section: Oxidative Valorization Of Ligninmentioning

confidence: 99%

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On the Oxidative Valorization of Lignin to High‐Value Chemicals: A Critical Review of Opportunities and Challenges

et al. 2022

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“…However, has been used as a precursor in the chemical industry for second-generation products. Also used in the pharmaceutical industry as an antibacterial compound.[10], [11]Ferulic acidThis compound can be obtained from two different sources: guaiacol oxidation group or 5-HMF dehydration group. The global market is valued in USD $ 53 millions.It is used in food, pharmaceutical and personal care industry as an antioxidant as well as a photoprotective compound for other anti-oxidant such as ascorbic acid.…”

Section: Datamentioning

confidence: 99%

Data set of green extraction of valuable chemicals from lignocellulosic biomass using microwave method

et al. 2019

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Lignocellulosic biomass is a promising alternative for the replacement of limited fossil resources to produce various chemical compounds, such as 5-hydroxymethylfurfural, furfural, vanillin, vanillic acid, ferulic acid, syringaldehyde, and 4-aminobenzoic acid. However, the complex biomass structure is a limitation to making effective use of this naturally found feedstock. This research presents a data set of different compounds obtained directly from forest residues, with special emphasis on achieving effective utilization of the biomass. The extraction method and the catalyst are considered as the two main factors in this valorization process.

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Microwave-Assisted Lignin Wet Peroxide Oxidation to C₄ Dicarboxylic Acids

Vega-Aguilar

Costa

Barreiro

et al. 2022

Ind. Eng. Chem. Res.

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Innovative methodologies, such as microwaveassisted reaction, can help to valorize lignin with higher productivity and better energy efficiency. In this work, microwave heating was tested in the wet peroxide oxidation of three lignins (Indulin AT, Lignol, and Eucalyptus globulus lignins) as a novel methodology to obtain C 4 dicarboxylic acids. The effect of temperature, time, and catalyst type (TS-1 or Fe-TS1) was evaluated in the production of these acids. The TS-1 catalyst improved succinic acid yield, achieving up to 9.4 wt % for Lignol lignin. Moreover, the microwave heating specifically enhanced Lignol conversion to malic acid (34 wt %), even without catalyst, showing to be an attractive path for the future valorization of organosolv lignins. Overall, compared to conventional heating, microwave heating originated a rapid lignin conversion. Nevertheless, for prolonged times, conventional heating led to better results for some target products, e.g., malic and succinic acids.

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Integrated Process for Vanillin and Syringaldehyde Production from Kraft Lignin

Cited by 3 publications

References 66 publications

On the Oxidative Valorization of Lignin to High‐Value Chemicals: A Critical Review of Opportunities and Challenges

On the Oxidative Valorization of Lignin to High‐Value Chemicals: A Critical Review of Opportunities and Challenges

Data set of green extraction of valuable chemicals from lignocellulosic biomass using microwave method

Microwave-Assisted Lignin Wet Peroxide Oxidation to C₄ Dicarboxylic Acids

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Integrated Process for Vanillin and Syringaldehyde Production from Kraft Lignin

Cited by 3 publications

References 66 publications

On the Oxidative Valorization of Lignin to High‐Value Chemicals: A Critical Review of Opportunities and Challenges

On the Oxidative Valorization of Lignin to High‐Value Chemicals: A Critical Review of Opportunities and Challenges

Data set of green extraction of valuable chemicals from lignocellulosic biomass using microwave method

Microwave-Assisted Lignin Wet Peroxide Oxidation to C4 Dicarboxylic Acids

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Product

Resources

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Microwave-Assisted Lignin Wet Peroxide Oxidation to C₄ Dicarboxylic Acids