Influence of salts on the dehydration of several biomass-derived polyols in sub- and supercritical water

Ott, Lothar; Lehr, Vanessa; Urfels, Stephan; Bicker, Markus; Vogel, Herbert

doi:10.1016/j.supflu.2005.11.004

Cited by 20 publications

(15 citation statements)

References 23 publications

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“…The synthesis examples described in Section 4 were achieved with the help of a continuously driven high-pressure apparatus with a flow tube reactor made of stainless steel [12]. Temperatures up to 500 8C and pressures up to 35 MPa are feasible in this apparatus.…”

Section: Methodsmentioning

confidence: 99%

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Catalytic dehydration of biomass-derived polyols in sub- and supercritical water

et al. 2007

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Section: Methodsmentioning

confidence: 99%

“…The residence time range lies between 10 and 180 s. Quantitative analysis of the reaction products was carried out by GC-FID as well as HPLC with RI detector. A detailed description of the experiments carried out and of the apparatus are mentioned by Ott et al [12] and Jung [13].…”

Section: Methodsmentioning

confidence: 99%

Catalytic dehydration of biomass-derived polyols in sub- and supercritical water

et al. 2007

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“…7). The further refinement of polyols with adjacent hydroxyl groups, for example, to aldehydes and/or ketones occurs via pinacol-pinacolone rearrangement [75]: during the distillation of pinacol with concentrated sulfuric acid dehydration takes place, followed by an intramolecular rearrangement to pinacolone (methyl-tert-butylketone). This happens much more elegantly in hot high pressure water under the catalytic influence of acetic acid [76,77].…”

Section: Sorbit (1 Glucose + H 2 ( 1 Sorbit: Hydrogenation)mentioning

confidence: 99%

The Roll of Chemocatalysis in the Establishment of the Technology Platform “Renewable Resources”

Claus

Vogel

2008

Chem Eng & Technol

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The FRG has no economical access to crude oil. It is therefore an important future task to organize a post‐fossil sustainable era of material economy and to develop new processes based on alternative carbon sources. The change in raw material base is not a new experience for the chemical industry, it has always generated a wave of innovation and an economic boom. A precondition for this is to early develop scientific and technological bases for the new, yet age‐old raw material base biomass and to use the existing know‐how of petrochemistry, especially in the area of chemocatalysis.

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“…For this purpose, the use of 1,4-AHERY is promising as a starting material because it can be produced easily from erythritol by an acid catalyst, [23][24][25][26][27] and 1,4-AHERY can be converted into 1,2,3-butanetriol (1,2,3-BuT) because the ringopening hydrogenolysis of tetrahydrofuran to 1-butanol proceeds effectively over Rh-based catalysts. [36] This route provides the selective dissociation of one primary OH group in erythritol.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 2‐Butanol by Selective Hydrogenolysis of 1,4‐Anhydroerythritol over Molybdenum Oxide‐Modified Rhodium‐Supported Silica

et al. 2016

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Rh-MoOx /SiO2 (Mo/Rh=0.13) is an effective catalyst for the hydrogenolysis of 1,4-anhydroerythritol (1,4-AHERY) and provides 2-BuOH in high yield of 51 %. This is the first report of the production of 2-BuOH from 1,4-AHERY by hydrogenolysis. 1,4-AHERY was more suitable as a starting material than erythritol because the 2-BuOH yield from erythritol was low (34 %). Based on the kinetics and comparison of reactivities of the related compounds using Rh-MoOx /SiO2 and Rh/SiO2 catalysts, the modification of Rh/SiO2 with MoOx leads to the high activity and high selectivity to 2-BuOH because of the generation of reactive hydride species and the strong adsorption of 1,4-AHERY on MoOx species. The reaction proceeds by main two routes, (I) the combination of single C-O hydrogenolysis with the desorption of intermediates, a usual route in hydrogenolysis, and (II) multiple C-O hydrogenolysis without the desorption of intermediates from the active site, and the reaction mechanism for Route (II) is proposed.

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Influence of salts on the dehydration of several biomass-derived polyols in sub- and supercritical water

Cited by 20 publications

References 23 publications

Catalytic dehydration of biomass-derived polyols in sub- and supercritical water

Catalytic dehydration of biomass-derived polyols in sub- and supercritical water

The Roll of Chemocatalysis in the Establishment of the Technology Platform “Renewable Resources”

Synthesis of 2‐Butanol by Selective Hydrogenolysis of 1,4‐Anhydroerythritol over Molybdenum Oxide‐Modified Rhodium‐Supported Silica

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