Ionic liquids and continuous flow processes: a good marriage to design sustainable processes

García‐Verdugo, Eduardo; Altava, Belén; Burguete, M. Isabel; Lozano, Pedro; Luis, Santiago V.

doi:10.1039/c4gc02388a

Cited by 104 publications

(73 citation statements)

References 135 publications

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“…[239,240] Ionic liquids are capable of dissolving biobased chemicals with highly crystalline structures that are insoluble in water (e. g., cellulose) and have already been widely utilized for the acid catalyzed synthesis of furans from these sugar sources in batch reactors. The high surface area to volume ratio achieved in microreactors increases heat and mass transfer rates, thus improving the sugar conversion, the furan selectivity and yield in a biphasic system.…”

Section: Opportunitiesmentioning

confidence: 99%

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

2019

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Biomass as a renewable and abundantly available carbon source is a promising alternative to fossil resources for the production of chemicals and fuels. The development of biobased chemistry, along with catalyst design, has received much research attention over recent years. However, dedicated reactor concepts for the conversion of biomass and its derivatives are a relatively new research field. Continuous flow microreactors are a promising tool for process intensification, especially for reactions in multiphase systems. In this work, the potential of microreactors for the catalytic conversion of biomass derivatives to value-added chemicals and fuels is critically reviewed. Emphases are laid on the biphasic synthesis of furans from sugars, oxidation and hydrogenation of biomass derivatives. Microreactor processing has been shown capable of improving the efficiency of many biobased reactions, due to the transport intensification and a fine control over the process. Microreactors are expected to contribute in accelerating the technological development of biomass conversion and have a promising potential for industrial application in this area.

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Section: Opportunitiesmentioning

confidence: 99%

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

2019

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“…[30,31,47,48] The use of consecutive fix-bed reactors can provide the required isolation of the catalysts by compartmentalisation and to favour the simple and continuous production of the chiral target without the need for isolation of any intermediates and without requiring the separation of any catalysts, co-products, byproducts, and excess reagents. [16,27,28,49,50] Thus, the use of a continuous flow process using benzaldehyde as the starting material to perform a telescopic synthesis of the corresponding cyanohydrin was evaluated. Accordingly, the continuous synthesis of the cyanohydrin esters using two fixed-bed reactors coupled together in-line was initially evaluated.…”

Section: Full Papersmentioning

confidence: 99%

Supported Ionic Liquid‐Like Phases (SILLPs) as Immobilised Catalysts for the Multistep and Multicatalytic Continuous Flow Synthesis of Chiral Cyanohydrins

et al. 2019

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Supported Ionic Liquid‐Like Phases have been found to be efficient organocatalysts for the synthesis of cyanohydrin esters under solvent‐free conditions by an “electrophile‐nucleophile dual activation” based on hydrogen bond formation. The combination of multiple and consecutive multicatalytic steps in a single and integrated cascade process of organocatalytic SILLPs with commercially available supported Candida antarctica lipase type B (CAL‐B) has allowed developing an efficient process for the multicatalytic synthesis of enantiopure cyanohydrins under flow conditions.

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“…[24] In the case of polymers bearing IL-like fragments covalently attached (supported IL-like phases:S ILLPs), the nature and loading of the IL-like units influence the macroscopic properties of the material [25] but also play an important role for the activity and stabilityo ft he immobilized catalytic species. [27] In the search for new applications of SILLPs, we here reportt he synthesis of polymeric materials modifiedw ith ILlike units as suitable supports and solid media for photocatalytic processes. [26] Furthermore, SILPs based on solid, insoluble, crosslinked polymers allow their straightforward application for the developmento fc ontinuous-flow processes.…”

Section: Introductionmentioning

confidence: 99%

Rose Bengal Immobilized on Supported Ionic‐Liquid‐like Phases: An Efficient Photocatalyst for Batch and Flow Processes

et al. 2019

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The catalytic activity of Rose Bengal (RB) immobilized on supported ionic liquid (IL)‐like phases was evaluated as a polymer‐supported photocatalyst. In these systems, the polymer was designed to play a pivotal role. The polymeric backbone adequately modified with IL‐like moieties (supported IL‐like phases, SILLPs) was not just an inert support for the dye but controlled the accessibility of reagents/substrates to the active sites and provided specific microenvironments for the reaction. The structure of SILLPs could be finetuned to adjust the catalytic efficiency of the RB‐SILLP composites, achieving systems that were more active and stable than the related systems in the absence of IL‐like units.

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Ionic liquids and continuous flow processes: a good marriage to design sustainable processes

Abstract: In the last few years the use of Ionic Liquids (ILs) as alternative solvents for (bio)catalytic processes has increased substantially, and the benefits and different approaches reported to combine continuous flow systems and ILs are at the core of this overview.

Cited by 104 publications

References 135 publications

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

Catalytic Transformation of Biomass Derivatives to Value‐Added Chemicals and Fuels in Continuous Flow Microreactors

Supported Ionic Liquid‐Like Phases (SILLPs) as Immobilised Catalysts for the Multistep and Multicatalytic Continuous Flow Synthesis of Chiral Cyanohydrins

Rose Bengal Immobilized on Supported Ionic‐Liquid‐like Phases: An Efficient Photocatalyst for Batch and Flow Processes

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