Green solvents for sustainable separation processes

Schuur, Boelo; Brouwer, Thomas; Smink, Dion; Sprakel, Lisette M.J.

doi:10.1016/j.cogsc.2018.12.009

Cited by 93 publications

(43 citation statements)

References 65 publications

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“… 3 Besides biobased solvents, the use of aqueous solvent systems, switchable solvents, ionic liquids, deep eutectic solvents, CO 2 tunable solvents, CO 2 expanded liquids, and liquid polymers also often have solid green credentials. 12 − 14 The most common solubilizers are surfactants and hydrotropes and these are most often amphiphilic compounds which can enhance the aqueous solubility of hydrophobic compounds markedly. 15 − 18 On a molecular level, surfactants tend to feature longer C8–C20 alkyl chains while hydrotropes typically have shorter alkyl tails (≤C4) and/or aromatic rings.…”

Section: Introductionmentioning

confidence: 99%

Geminal Diol of Dihydrolevoglucosenone as a Switchable Hydrotrope: A Continuum of Green Nanostructured Solvents

bruyn

Budarin

Misefari

et al. 2019

ACS Sustainable Chem. Eng.

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The addition of water to dihydrolevoglucosenone (Cyrene) creates a solvent mixture with highly unusual properties and the ability to specifically and efficiently solubilize a wide range of organic compounds, notably, aspirin, ibuprofen, salicylic acid, ferulic acid, caffeine, and mandelic acid. The observed solubility enhancement (up to 100-fold) can be explained only by the existence of microenvironments mainly centered on Cyrene’s geminal diol. Surprisingly, the latter acts as a reversible hydrotrope and regulates the polarity of the created complex mixture. The possibility to tune the polarity of the solvent mixture through the addition of water, and the subsequent generation of variable amounts of Cyrene’s geminal diol, creates a continuum of green solvents with controllable solubilization properties. The effective presence of microheterogenieties in the Cyrene/water mixture was adequately proven by (1) Fourier transform infrared/density functional theory showing Cyrene dimerization, (2) electrospray mass-spectrometry demonstrating the existence of dimers of Cyrene’s geminal diol, and (3) the variable presence of single or multiple tetramethylsilane peaks in the 1 H NMR spectra of a range of Cyrene/water mixtures. The Cyrene–water solvent mixture is importantly not mutagenic, barely ecotoxic, bioderived, and endowed with tunable hydrophilic/hydrophobic properties.

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Section: Introductionmentioning

confidence: 99%

Geminal Diol of Dihydrolevoglucosenone as a Switchable Hydrotrope: A Continuum of Green Nanostructured Solvents

bruyn

Budarin

Misefari

et al. 2019

ACS Sustainable Chem. Eng.

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“…The processes reported in literature differ mainly in the treatment of these independent variables, for example, regarding the type of alternative solvent and homogenization methods used. Choosing the most appropriate solvent is a crucial step, and for that, four main factors must be considered, namely, (i) the biocompatibility of the solvent with the target compound, (ii) toxicity, (iii) cost, and (iv) recyclability potential (Płotka‐Wasylka, Rutkowska, Owczarek, Tobiszewski, & Namieśnik, 2017; Schuur, Brouwer, Smink, & Sprakel, 2019). Considering the extraction of carotenoids as an example, the use of tensioactive solvents is a facilitator due to their low polarity (Choi et al., 2019; Ulloa et al., 2012), contrarily to what happens for the extraction of anthocyanins and phycobiliproteins, for which hydrophilic solvents are the best approach.…”

Section: (Solid–liquid) Extraction Of Natural Pigments From Biomassmentioning

confidence: 99%

Insights on the use of alternative solvents and technologies to recover bio‐based food pigments

Mesquita

Martins

Pisani

et al. 2020

Comp Rev Food Sci Food Safe

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This review will discuss, under the Circular Economy and Biorefinery concepts, the performance of the alternative solvents in the downstream process to recover natural pigments in a more sustainable way. Conventionally, pigments marketed on an industrial scale are produced through chemical synthesis by using petroleum derivatives as the main raw material. Also, the current production chain of the synthetic dyes is linear, with no solvent recycling and waste generation. Thus, the most promising processes of extraction and purification of natural pigments and strategies on the polishing of the solvents are here reviewed. In this review, the use of alternative solvents, namely, ionic liquids, eutectic solvents, aqueous solutions of surfactants, and edible oils, for recovering natural pigments was reviewed. Works discussing higher extraction yields and selectivity, while maintaining the stability of the target pigments, were reported. Also, a panorama between Sustainability and Circular Economy prospection was discussed for better comprehension of the main advances in the field. Behind the analysis of the works published so far on the theme, the most important lacunas to overcome in the next years on the field were pointed out and discussed. Also, the future trends and new perspectives to achieve the economic viability and sustainability of the processes using alternative solvents will be scrutinized.

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“…Será un factor clave, entonces, no solo considerar la operación de separación de biomoléculas (Sholl y Lively, 2016), sino también la energía utilizada y la eficiencia obtenida al final del procedimiento de extracción para mantener la funcionalidad de estas moléculas recuperadas. En una visión general de los desarrollos de solventes hacia procesos de separación más sostenibles y ecológicos, es clave que no solo se pueda considerar la operación de separación primaria, sino también todo el proceso, incluida la recuperación de solventes, porque eso es típicamente donde la energía invertida (Schuur et al, 2019). Los solventes son de gran importancia en las reacciones dentro de los procesos de purificación.…”

Section: Disolventes Verdesunclassified

Tecnologías ecoeficientes para la valoración de residuos agroindustriales en frutas y hortalizas

Cornejo-Figueroa¹,

Cartagena-Cutipa²,

Alcázar-Alay³

2020

ING

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El creciente desarrollo de tecnologías ecoeficientes para la obtención de biocompuestos activos está teniendo cada vez mayor impacto en la industria de productos alimentarios y no alimentarios los cuales un objetivo en particular, la extracción de metabolitos activos a partir de la matriz vegetal de diversos residuos naturales de frutas y hortalizas, contribuyendo así, con la salud y el manejo de metodologías que son respetuosas con el medio ambiente pues procuran emplear solventes que generen menor impacto en la contaminación del mismo. Es así que el estudio de estas tecnologías como la Extracción con agua subcrítica, Extracción asistida por microondas, Extracción con fluidos supercríticos, pretenden optimizar sus procesos unitarios para lograr ser más eficientes y sostenibles, obteniendo mayor pureza y rendimiento en la obtención de extractos bioactivos controlando parámetros en las propiedades fisicoquímicas de los propios solventes en uso. También están las prácticas que permiten la reinserción de residuos naturales mediante su aprovechamiento a partir de su origen biológico, así como lo son la Fermentación de sustrato sólido en biorreactores y el Desarrollo de biopelículas por compresión térmica para la generación de nuevos productos con valor agregado.

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Green solvents for sustainable separation processes

Cited by 93 publications

References 65 publications

Geminal Diol of Dihydrolevoglucosenone as a Switchable Hydrotrope: A Continuum of Green Nanostructured Solvents

Geminal Diol of Dihydrolevoglucosenone as a Switchable Hydrotrope: A Continuum of Green Nanostructured Solvents

Insights on the use of alternative solvents and technologies to recover bio‐based food pigments

Tecnologías ecoeficientes para la valoración de residuos agroindustriales en frutas y hortalizas

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