Recovery of vanillin from Kraft lignin oxidation by ion-exchange with neutralization

Žabková, Miriam; Silva, E.A. Borges da; Rodrigues, Alı́rio E.

doi:10.1016/j.seppur.2006.10.027

Cited by 34 publications

(19 citation statements)

References 35 publications

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“…From Eq. (7) the acid dissociation constant, K a , for VSA is 1/K e so that the value of pK a calculated in this experiment is 7.4 at 290 K, which is identical to the value reported by Zabkova [9]. A similar pK a value (7.3 for vanillin at room temperature) had been reported by Englis and Wollermann [19].…”

Section: Adsorption Equilibrium Isothermsupporting

confidence: 89%

“…(6), the form (ionized or un-ionized) of VSA is greatly influenced by the pH of the solution, which greatly affects the adsorption equilibrium isotherm. The study of Zabkova et al [9] suggest that at pH<4.5 all of the VSA is essentially present in unionized form and the Eq. (3) can be used to study the adsorption isotherm.…”

Section: Adsorption Equilibrium Isothermmentioning

confidence: 98%

“…Forss and coworkers [8] reported on a method of vanillin isolation from the oxidized spent sulfite liquor which used a cation-exchange resin. Zabkova et al [9] separated vanillin by adsorption ion-exchange resin using both static and dynamic approaches. da Silva et al [10] reported an integrated process for recovering vanillin from the oxidation products of treated lignin by the combined processes of ultrafiltration separation, ion-exchange and crystallization purification.…”

Section: Introductionmentioning

confidence: 99%

“…Although the above mentioned ion-exchange adsorbents have high selectivity for vanillin isolation, the lower adsorption capacity of ion-exchange resin, such as 5.3 mg/g (vanillin/resin) reported by Zabkova et al [9], limits its application in industrial settings. Recently, it was found that resin with macroporosity can significantly increase the resin's adsorption capacity for VSA compounds [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Separation of Vanillin and Syringaldehyde from Oxygen Delignification Spent Liquor by Macroporous Resin Adsorption

Wang

Chen

et al. 2010

CLEAN Soil Air Water

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This paper reports on an approach for separating vanillin and syringaldehyde (VSA) from oxygen delignification spent liquor using non-polar macroporous resin. The effects of temperature and pH on the adsorption isotherms were studied. The adsorption capacity and adsorption equilibrium constant were obtained using the Langmuir adsorption model at pH<4.5, where the ionization of the VSA to ionic forms was negligible. The standard enthalpy change was calculated using the van't Hoff equation and clearly showed that the adsorption is an exothermic process. The effect of pH on the adsorption isotherm is well-described by a modified Langmuir model and shows that the adsorption equilibrium constant decreases significantly with the increasing pH. The VSA adsorbed on macroporous resin was eluted by ethyl ether. The separated VSA contained 37.51% vanillin, 31.88% syringaldehyde. The recoveries of VSA were 96.2 and 94.7%, respectively.

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Section: Adsorption Equilibrium Isothermsupporting

confidence: 89%

Section: Adsorption Equilibrium Isothermmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Separation of Vanillin and Syringaldehyde from Oxygen Delignification Spent Liquor by Macroporous Resin Adsorption

Wang

Chen

et al. 2010

CLEAN Soil Air Water

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“…Sodium vanillate and other low molecular weight species go to the permeate stream. 41 Finally, the permeate containing smaller molecules and excess NaOH flows through a packed bed with an acid resin, in order to convert the sodium vanillate into vanillin. 42 This ion-exchange step is accompanied by a neutralization reaction thus originating an exit stream with lower pH.…”

mentioning

confidence: 99%

Review Paper on Biofuels from Lignin

Kumar¹,

Priya²

2018

IJASTR

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Biofuels are need of present time as fossil fuels are diminishing day by day and we are in search of some alternative to fossil fuels. Biofuels are a medium for getting a prosperous future without pollution . Dawn of Biofuels has already been occur and the day is not so far when each and every vehicle will get driving energy from Biofuel. The forest biorefinery concept involves converting a pulp mill into a multipurpose biofuels, biomaterials, and biopower production facility in which these products are produced in an environmentally compatible and sustainable manner. We will have to enhance quality of Biofuels for making appreciable use of it.

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Separation and Purification of Vanillin and Syringaldehyde from an Oxidized Kraft Liquor – A Mini Review

Tarigan,

Ebrahimi

2024

Chemie Ingenieur Technik

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Lignin is one of the most abundant bio‐aromatic molecular resources, but it is currently underutilized for energy production in the pulp and paper industry. Unlocking the full potential of lignin could have a significant impact on reducing environmental pollution, increasing the use of renewable resources, and achieving environmentally beneficial economic growth. However, effective lignin valorization requires viable and integrated reaction and separation processes to produce high value monomeric phenolics, such as vanillin and syringaldehyde. The aim of this short review is to summarize the studies on different separation methods of lignin derivatives obtained from black liquor, including extraction, membrane filtration, chromatographic separation, and the combination technologies.

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Recovery of vanillin from Kraft lignin oxidation by ion-exchange with neutralization

Cited by 34 publications

References 35 publications

Separation of Vanillin and Syringaldehyde from Oxygen Delignification Spent Liquor by Macroporous Resin Adsorption

Separation of Vanillin and Syringaldehyde from Oxygen Delignification Spent Liquor by Macroporous Resin Adsorption

Review Paper on Biofuels from Lignin

Separation and Purification of Vanillin and Syringaldehyde from an Oxidized Kraft Liquor – A Mini Review

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