Recovery of vanillin from kraft lignin depolymerization with water as desorption eluent

Gomes, E.D.; Rodrigues, Alírio E.

doi:10.1016/j.seppur.2020.116551

Cited by 28 publications

(10 citation statements)

References 31 publications

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“…The main sequences of downstream processes used for oxidized lignin mixtures include liquid-liquid extraction (LLE), membrane separation, adsorption, ion exchange, distillation, acidification/precipitation, bisulfitation, supercritical fluid extraction (SFE), and crystallization. [41,42,[97][98][99][100] Among the variety of compounds resulting from oxidative lignin depolymerization, vanillin and syringaldehyde usually represent the major products, but still make up only a small fraction of the product mixture. The greatest challenge is to find the most effective method of separating these high-value aromatic aldehydes in as pure a form as possible from the product mixture, given the diversity of processes available.…”

Section: Product Recovery In the Oxidative Valorization Of Technical ...mentioning

confidence: 99%

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: Product Recovery In the Oxidative Valorization Of Technical ...mentioning

confidence: 99%

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

et al. 2022

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“…Lignin is one of the components in the biomass mainly composed of lignocellulose [1][2][3]. Different with hemicellulose and cellulose, lignin possesses complicated three-dimensional net structures, which consist of three phenylpropane units connected by ether bonds and carbon-carbon bonds [4][5][6]. The aryl macromolecules with various linear branches and complicated structures result in inhomogeneous properties, and further restrict the application of lignin in the biomass industrial fields.…”

Section: Introductionmentioning

confidence: 99%

Extracting lignin-SiO2 composites from Si-rich biomass to prepare Si/C anode materials for lithium ions batteries

Liu

et al. 2021

Materials Chemistry and Physics

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“…The residues of vanilla, coconut, rice, lignocellulosic biomass, or the fermentation broths obtained in the production of the compounds derived from vanilla through the action of microorganisms, among others, represent an interesting option for the recovery of these high added-value molecules. 27,28 For instance, the production of biovanillin from substances such as glucose or lignin can reach values between ca. 100−500 mg/L, with usable residual effluents at lower concentrations.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Consequently, the use and recovery of these compounds already present in effluents from different agri-food industries becomes an opportunity to optimize the production of the desired compounds and allow their maximum use. The residues of vanilla, coconut, rice, lignocellulosic biomass, or the fermentation broths obtained in the production of the compounds derived from vanilla through the action of microorganisms, among others, represent an interesting option for the recovery of these high added-value molecules. , For instance, the production of biovanillin from substances such as glucose or lignin can reach values between ca. 100–500 mg/L, with usable residual effluents at lower concentrations. , Moreover, environmental regulations limit the maximum allowed concentration of these compounds that the wastewater streams can contain before being discharged .…”

Section: Introductionmentioning

confidence: 99%

Sustainable Recovery of High Added-Value Vanilla Compounds from Wastewater Using Green Solvents

Cañadas

González‐Miquel

González

et al. 2021

ACS Sustainable Chem. Eng.

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The growing demand for high added-value products, such as vanilla-derived compounds, and increasing environmental regulations make evident the need to find new sustainable solvents for extraction processes, which meet both legislative requirements and expected yields. Vanilla-derived compounds are known for their antioxidant and beneficial properties for human health. These compounds can be recovered from effluent streams, promoting decontamination and revaluation of wastewater. The potential of using neoteric solvents, i.e., biobased solvents and hydrophobic eutectic solvents, as an alternative to conventional volatile organic solvents, such as ethyl acetate, for sustainable recovery of vanilla-derived compounds through liquid–liquid extraction from aqueous environments was investigated. Three biobased solvents (2-methyltetrahydrofuran, cyclopentyl methyl ether, and d-limonene) and three hydrophobic eutectic solvents constituted by menthol and organic acids (1:1 dl-menthol:octanoic acid, 1:1 dl-menthol:decanoic acid, and 2:1 dl-menthol:dodecanoic acid) were evaluated. The extraction process was optimized in terms of the stirring time and solvent:feed volume ratio. The effect of the initial solute concentration was also analyzed. The extraction efficiency of solvents was determined by UV–visible spectrophotometry and high-performance liquid chromatography with diode-array detection. The experimental results indicated that 2-methyltetrahydrofuran yielded the highest extraction efficiency from a vanilla bean extract solution for both vanillin (95.37%) and vanillic acid (91.96%) with good repeatability (RSD < 0.40%). Regarding the rest of the neoteric solvents, cyclopentyl methyl ether and hydrophobic eutectic solvents provided extraction values between 31.6 and 95.4% for both vanilla-derived compounds, while d-limonene was significantly less effective. Finally, a solvent recycling and reuse study was successfully carried out, showing that 2-methyltetrahydrofuran stands out as a promising biobased extraction solvent for sustainable recovery of valuable vanilla constituents.

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Recovery of vanillin from kraft lignin depolymerization with water as desorption eluent

Cited by 28 publications

References 31 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

Extracting lignin-SiO2 composites from Si-rich biomass to prepare Si/C anode materials for lithium ions batteries

Sustainable Recovery of High Added-Value Vanilla Compounds from Wastewater Using Green Solvents

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