Isolierung von Kohlenhydratcarbonsäuren aus wässrigen Lösungen durch Reaktivextraktion

Hirth, Joachim; Bicker, Markus; Vogel, Herbert

doi:10.1002/1522-2640(200203)74:3<345::aid-cite345>3.0.co;2-f

Cited by 5 publications

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“…Our reason to study the biphasic reaction mixtures was to combine FA isolation in a clever way with the OxFA reaction process because simple distillation is not feasible due to the high-boiling water-FA azeotrope. The established technical protocols used to isolate pure FA from aqueous solutions include azeotropic distillation, 26,27 liquid-liquid extraction, [28][29][30] extraction followed by distillation, [31][32][33] reactive extraction [34][35][36][37][38] as well as extractive distillation. [39][40][41][42] In the context of POM-catalysed biomass oxidation, the FA isolation process must, in addition, deal with the water-soluble, highly acidic heteropolyacid (HPA) catalyst to allow for efficient catalyst recycling.…”

Section: Introductionmentioning

confidence: 99%

Biomass oxidation to formic acid in aqueous media using polyoxometalate catalysts – boosting FA selectivity by in-situ extraction

Reichert

Brunner

Jess

et al. 2015

Energy Environ. Sci.

140

139

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a Herein, we report a remarkable finding that biomass oxidation to formic acid (FA) in water-organic biphasic reaction systems is far more selective than the same reaction in a monophasic aqueous media.While literature claims that the yield of FA from carbohydrates and biomass is limited to less than 68%, even for simple substrates such as glucose or glycerol, we demonstrate in this study that FA yields of up to 85% can be obtained from glucose. Using our biphasic reaction protocol, even raw lignocellulosic biomass, such as beech wood, leads to FA yields of 61%. This is realized by applying polyoxometalate H 8 PV 5 Mo 7 O 40 as a homogeneous catalyst, oxygen as the oxidant and water as the solvent in the presence of a long-chain primary alcohol as an in-situ extracting agent. The new, liquid-liquid biphasic operation opens a highly effective way to produce pure FA, a liquid syngas equivalent, from wood in a robust, integrated, and low-temperature process.

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Section: Introductionmentioning

confidence: 99%

Biomass oxidation to formic acid in aqueous media using polyoxometalate catalysts – boosting FA selectivity by in-situ extraction

Reichert

Brunner

Jess

et al. 2015

Energy Environ. Sci.

140

139

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Trennung von Glucoseoxigenaten durch Reaktivextraktion

Hirth

Bicker

Vogel

2003

Chemie Ingenieur Technik

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Selective Recovery of Carbohydrates from Aqueous Solution Facilitated by a Carrier

Hameister

Kragl

2006

Engineering in Life Sciences

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Carbohydrate recovery is an active area of supramolecular chemistry, motivated by the biological importance of saccharides as well as the unusual challenge presented by these complex substances. The recovery of carbohydrates from aqueous media is a difficult separation problem due to the large, irregular and multivalent structure and the low solubility of carbohydrates in organic solvents. A method for the selective recovery of mono‐ and disaccharides from aqueous media has been developed. The use of different organic solvents like butanol, methyl tertiary‐butyl ether (MTBE), n‐hexane or toluene for liquid‐liquid extraction of carbohydrates was investigated. This extraction process is facilitated by a carrier, i.e., primary amines such as cyclooctylamine. The influence of different parameters (temperature, amine concentration, extraction time) on the efficiency of the extraction was studied. Recovery rates up to 40 % are possible in a one‐stage process. Selectivities range from 1.3 up to 875.4.

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Isolierung von Kohlenhydratcarbonsäuren aus wässrigen Lösungen durch Reaktivextraktion

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Cited by 5 publications

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Biomass oxidation to formic acid in aqueous media using polyoxometalate catalysts – boosting FA selectivity by in-situ extraction

Biomass oxidation to formic acid in aqueous media using polyoxometalate catalysts – boosting FA selectivity by in-situ extraction

Trennung von Glucoseoxigenaten durch Reaktivextraktion

Selective Recovery of Carbohydrates from Aqueous Solution Facilitated by a Carrier

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