Birch fractionation in γ-valerolactone with the emphasis on pulp properties: prehydrolysis, acid-catalyzed, and alkaline-catalyzed concept

Granatier, Marianna; Lê, Huy; González, Eva Carmona; Sixta, Herbert

doi:10.1039/d2su00046f

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…Recent research indicates that biobased solvents, including glycerol ethers, ,, alkanediols, dihydrolevoglucosenone (Cyrene), − γ-valerolactone (GVL), − and ethyl lactate, can serve as efficient hydrotropes to increase the aqueous solubility of hydrophobic compounds. Moity et al showed that monoglycerol ethers improve the solubility of hydrophobic dyes.…”

Section: Introductionmentioning

confidence: 99%

Solubility Enhancement of Hydrophobic Compounds in Aqueous Solutions Using Biobased Solvents as Hydrotropes

Silva

Abranches

Pinto

et al. 2023

Ind. Eng. Chem. Res.

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Improving the aqueous solubility of poorly soluble hydrophobic compounds is a topic of great interest to the pharmaceutical, chemical, and food industries. The poor solubility of these compounds in water poses a challenge in developing sustainable processes for their extraction, separation, and formulation. Therefore, in this study, the use as hydrotropes of biobased solvents such as γ-valerolactone (GVL), Cyrene, ethyl lactate, and alkanediols (1,2-propanediol, 1,5-pentanediol, and 1,6-hexanediol) to improve the solubility of two model compounds (syringic acid and ferulic acid) in water is investigated. The effects of the concentration and structure of biobased solvents on the solubility of phenolic compounds in aqueous solutions at (303.2 ± 0.5) K were studied. The results showed that the aqueous solubility of the phenolic compounds studied typically increased with the log (K OW) of the hydrotrope (1,2-propanediol < Cyrene < 1,5-pentanediol < GVL < ethyl lactate < 1,6-hexanediol) and the hydrophobicity of the solute; the hydrotropic dissolution of phenolic compounds is shown to depend on both the hydrotrope and the solute. This study shows that some biobased solvents, especially GVL, are excellent hydrotropes. Their renewable nature, low price, and low toxicity make these results particularly relevant to the field of extraction and separation of bioactive compounds.

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Section: Introductionmentioning

confidence: 99%

Solubility Enhancement of Hydrophobic Compounds in Aqueous Solutions Using Biobased Solvents as Hydrotropes

Silva

Abranches

Pinto

et al. 2023

Ind. Eng. Chem. Res.

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“…γ-valerolactone, …). 207,208 The ability of different organic solvents to solubilize lignin is commonly described using the Hildebrand solubility parameter ( δ ), defined according to eqn (2).wherein Δ H̃ is the molar heat of vaporization of the solvent (J mol −1 ), R is the ideal gas constant (J mol −1 K −1 ), T is the temperature (K), and Ṽ is the molar volume of the solvent (m 3 mol −1 ). For optimal solvency, the Hildebrand solubility parameter of the solvent should match that of the solute, which, in the case of lignin, is about 23.5 MPa 1/2 .…”

Section: Lignocellulose Pretreatment As a Source Of Ligninmentioning

confidence: 99%

“…g-valerolactone, .). 207,208 The ability of different organic solvents to solubilize lignin is commonly described using the Hildebrand solubility parameter (d), dened according to eqn (2).…”

Section: −mentioning

confidence: 99%

A guide to lignin valorization in biorefineries: traditional, recent, and forthcoming approaches to convert raw lignocellulose into valuable materials and chemicals

Brienza,

Cannella,

Montesdeoca

et al. 2024

RSC Sustain.

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“…Alternatively, γvalerolactone (GVL) with cheap and non-toxic characteristics is considered as a promising candidate for the upgrading of paper-grade pulp (Fang and Sixta 2015). GVL is a biomassbased platform compound that can be acquired by the conversion of cellulose and hemicellulose (Giselle et al 2023;Granatier et al 2023a;Marianna et al 2023). Due to its non-toxicity, biodegradability, recyclability, and eco-friendliness, GVL has become an ideal solvent in the synthesis of some chemicals (Climent et al 2011;Sorokina et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Upgrading paper-grade bleached hardwood pulp towards dissolving pulp using γ-valerolactone

Liu,

Wang

et al. 2024

BioRes

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γ-Valerolactone (GVL) is a promising biomass-based platform compound that can be used for the removal of hemicellulose in pulp. In this study, a paper-grade pulp was treated using GVL to generate dissolving pulp for viscose production. The GVL concentration, treatment temperature, and reaction time had significant effect on the hemicellulose dissolution. The dissolving pulp with α-cellulose content of 92.3% and hemicellulose content of 5.45% was achieved with 60% GVL at 120 °C for 2 h. The Fock reactivity and intrinsic viscosity of the obtained dissolving pulp were 54.6% and 595 mL/g, which is comparable with the commercial product. In addition, GVL spent liquor was also recycled and reused to upgrade paper-grade pulp. By using purified recycled GVL to treat original pulp, the Fock reactivity of pulp was improved, and the cellulose content of as-prepared upgraded pulp increased to 92.1%, which was close to the cellulose content of dissolving pulp obtained from fresh GVL solution, while the intrinsic viscosity decreased significantly to 598 mL/g. Therefore, the efficient reuse of GVL not only ensured the high quality of dissolving pulp, but it also saved production costs and reduced environmental pollution.

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Birch fractionation in γ-valerolactone with the emphasis on pulp properties: prehydrolysis, acid-catalyzed, and alkaline-catalyzed concept

Abstract: Acid-catalyzed organosolv GVL pulping can yield high-purity dissolving pulp from birch with qualities comparable to commercial acid sulfite dissolving pulp.

Cited by 4 publications

References 21 publications

Solubility Enhancement of Hydrophobic Compounds in Aqueous Solutions Using Biobased Solvents as Hydrotropes

Solubility Enhancement of Hydrophobic Compounds in Aqueous Solutions Using Biobased Solvents as Hydrotropes

A guide to lignin valorization in biorefineries: traditional, recent, and forthcoming approaches to convert raw lignocellulose into valuable materials and chemicals

Upgrading paper-grade bleached hardwood pulp towards dissolving pulp using γ-valerolactone

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