Highly selective separation of eucalyptus hemicellulose by salicylic acid treatment with both aromatic and hydroxy acids

Deng, Baojuan; Hou, Ya‐Jun; Wang, Fei; Bao, Yuqi; Zeng, Fanyan; Qin, Chengrong; Liang, Chen; Huang, Caoxing; Ma, Jiliang; Yao, Shuangquan

doi:10.1016/j.biortech.2022.127304

Cited by 32 publications

(7 citation statements)

References 46 publications

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“…The surface elements of the pulp were analyzed using XPS (ESCALAB 250Xi, Thermo Fisher Scientific, Waltham, MA, USA). The thermal weight loss curves of the pulp were examined via TGA (STA 449F5, NETZSH, Bavaria, Germany) by increasing the temperature from 30 to 800 °C at 10 °C·min −1 under a nitrogen atmosphere [ 48 ].…”

Section: Methodsmentioning

confidence: 99%

Effects of the Preferential Oxidation of Phenolic Lignin Using Chlorine Dioxide on Pulp Bleaching Efficiency

Liu

Deng

Liang

et al. 2022

IJMS

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Chlorine dioxide is widely used for pulp bleaching because of its high delignification selectivity. However, efficient and clean chlorine dioxide bleaching is limited by the complexity of the lignin structure. Herein, the oxidation reactions of phenolic (vanillyl alcohol) and non-phenolic (veratryl alcohol) lignin model species were modulated using chlorine dioxide. The effects of chlorine dioxide concentration, reaction temperature, and reaction time on the consumption rate of the model species were also investigated. The optimal consumption rate for the phenolic species was obtained at a chlorine dioxide concentration of 30 mmol·L−1, a reaction temperature of 40 °C, and a reaction time of 10 min, resulting in the consumption of 96.3% of vanillyl alcohol. Its consumption remained essentially unchanged compared with that of traditional chlorine dioxide oxidation. However, the consumption rate of veratryl alcohol was significantly reduced from 78.0% to 17.3%. Additionally, the production of chlorobenzene via the chlorine dioxide oxidation of veratryl alcohol was inhibited. The structural changes in lignin before and after different treatments were analyzed. The overall structure of lignin remained stable during the optimization of the chlorine dioxide oxidation treatment. The signal intensities of several phenolic units were reduced. The effects of the selective oxidation of lignin by chlorine dioxide on the pulp properties were analyzed. Pulp viscosity significantly increased owing to the preferential oxidation of phenolic lignin by chlorine dioxide. The pollution load of bleached effluent was considerably reduced at similar pulp brightness levels. This study provides a new approach to chlorine dioxide bleaching. An efficient and clean bleaching process of the pulp was developed.

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Section: Methodsmentioning

confidence: 99%

Effects of the Preferential Oxidation of Phenolic Lignin Using Chlorine Dioxide on Pulp Bleaching Efficiency

Liu

Deng

Liang

et al. 2022

IJMS

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“…It has a high p K a value with an excellent osmotic effect. 21 New strong hydrogen bonds will be formed along with the reaction of the phenyl-containing DES with lignin. 22 The complex network of hydrogen bonds in lignocellulosic biomass will be efficiently disrupted utilizing strong hydrogen bonding.…”

Section: Introductionmentioning

confidence: 99%

Preparation of homogeneous lignin nanoparticles by efficient extraction of lignin and modification of its molecular structure using a functional deep eutectic solvent containing γ-valerolactone

Yao,

Liu,

Qin

et al. 2024

Green Chem.

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“…With the growing economy, worsening environmental pollution, and the scarcity of fossil resources, scientists are in search of green alternative energy sources worldwide [1]. Lignocellulosic biomass, a plentiful and potentially renewable biological resource, can be harvested from various sources, such as agricultural and forest residues [2]. Lignocellulose is composed mainly of lignin and two polysaccharides: cellulose and hemicellulose.…”

Section: Introductionmentioning

confidence: 99%

Sequential Bioprocess with Gluconobacter oxydans and Candida tropicalis for Gluconic Acid and Single-Cell Protein Production from Enzymatic Hydrolysate

et al. 2023

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To meet the growing global demand for gluconic acid as a cement and concrete retarder, inexpensive and abundant lignocellulosic materials are regarded as the most suitable alternatives to starchy materials. However, their enzymatic hydrolysate contains not only glucose but also xylose, which negatively affects the performance of gluconic acid as a retarder. Notably, glucose is preferentially bio-oxidized into gluconic acid by Gluconobacter oxydans, but gluconic acid cannot be metabolized by Candida tropicalis. Given this, an artificially designed biological cascade process, respectively employing Gluconobacter oxydans and Candida tropicalis, was established to successfully carry out glucose conversion into gluconic acid, and xylose into a single-cell protein, using the enzymatic hydrolysate of corncobs as a feedstock. This sequential fermentation process produced 95.8 g/L gluconic acid and 9.0 g/L single-cell protein from one liter of the enzymatic hydrolysate that initially contained 98.1 g/L of glucose and 25.4 g/L of xylose. The mass-balance calculation showed that approximately 280 grams of gluconic acid and 27 grams of the single-cell protein could be harvested from 1000 grams of the corncob feedstock. The results suggest that the above-mentioned two-step bioconversion method is efficient in utilizing glucose and xylose from lignocellulosic hydrolysates.

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Highly selective separation of eucalyptus hemicellulose by salicylic acid treatment with both aromatic and hydroxy acids

Cited by 32 publications

References 46 publications

Effects of the Preferential Oxidation of Phenolic Lignin Using Chlorine Dioxide on Pulp Bleaching Efficiency

Effects of the Preferential Oxidation of Phenolic Lignin Using Chlorine Dioxide on Pulp Bleaching Efficiency

Preparation of homogeneous lignin nanoparticles by efficient extraction of lignin and modification of its molecular structure using a functional deep eutectic solvent containing γ-valerolactone

Sequential Bioprocess with Gluconobacter oxydans and Candida tropicalis for Gluconic Acid and Single-Cell Protein Production from Enzymatic Hydrolysate

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