Oxidative dimerization of dimethyl ether with solid catalysts

Yagita, Hiroshi; Asami, Kōji; Muramatsu, Atsushi; Fujimoto, Kaoru

doi:10.1016/s0166-9834(00)80002-0

Cited by 22 publications

(17 citation statements)

References 9 publications

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“…In the mechanism, the reaction efficiency is usually related with the generation rate of peroxybenzoic acid and Criegee adduct‐like intermediate. As previous research has shown, SnO 2 can be used as a Lewis acid catalyst owing to its acid site . Carbonyl compounds could be activated by the coordination between the oxygen atom of the carbonyl group and the Lewis acid site.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Fe₃O₄‐l‐dopa‐Cu^II/Sn^IV@Micro‐Mesoporous‐SiO₂ Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Huo

et al. 2016

ChemCatChem

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A Magnetic mFe3O4‐l‐dopa‐CuII/SnIV@micro‐mesoporous‐SiO2 catalyst was successfully prepared. The catalyst exhibits high and stable catalytic activity for the Baeyer–Villiger oxidation reaction with air as oxidant. Furthermore, the selectivity can reach nearly 100 %. Meanwhile the catalyst can be easily separated by an external magnet and reused at least up to five cycles without any notable loss in catalytic activity. In addition, the effect of Sn and Cu on the oxidation of cyclohexanone is discussed.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Fe₃O₄‐l‐dopa‐Cu^II/Sn^IV@Micro‐Mesoporous‐SiO₂ Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Huo

et al. 2016

ChemCatChem

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“…However, it is not easy to directly blend DME with diesel because of the low boiling point of DME (−23.7 °C). Recent advances in the synthesis of DME from syngas derived from coal, biomass, and natural gas lead us to consider DME as a cheaper and less toxic raw material for the synthesis of high‐value‐added chemicals currently produced from methanol, such as DMMx, methyl formate (MF), dimethoxyethane (DMET), etc …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Polyoxymethylene Dimethyl Ethers from Dimethyl Ether Direct Oxidation over Carbon‐Based Catalysts

Gao

Wang

et al. 2017

ChemCatChem

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The synthesis of polyoxymethylene dimethyl ethers (DMMx) with a selectivity of 84.3 % by direct oxidation of dimethyl ether (DME) was realized over 30 %Ti(SO4)2/active carbon (AC) catalyst. This process also significantly promotes the growth of the C−O chain. The catalytic performances of Ti(SO4)2/AC and Ti(SO4)2/graphene (G) catalysts differ largely for DME oxidation reaction, although both AC and G are carbon materials. The carbonyl and hydroxyl groups on the surface of the carbon‐based catalysts play an important role in DME direct oxidation to DMMx. Owing to the differences of surface structure and chemical properties of AC and G materials, the different interaction between the Ti(SO4)2 and supports remarkably affects the sulfate structures on the supports surface and leads to the large differences in the acid and redox properties of catalysts.

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“…Dimethyl ether (DME), which is the simplest ether with the formula CH 3 OCH 3 , is well-known as a useful precursor to other organic chemicals such as liquefied petroleum gas (LPG) [1,2] and low molecular weight hydrocarbons [3] through catalytic systems [4][5][6]. Today, DME is also known as an alternative fuel that can replace conventional diesel fuels [7].…”

Section: Introductionmentioning

confidence: 99%

Dewatering and Extraction of Hydrophilic Solutes and Essential Oils from Cryo-preserved Lemon Peels Using Liquefied Dimethyl Ether

Nakamura

Hara

Kawano

2017

SERDJ

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In general, dewatering of plant tissues (such as vegetables) and food materials is achieved by heating. In order to prevent the degradation of biologically active components in plant materials, the dewatering process should be carried out at low temperature. Therefore, in the present study, we attempted to develop a simple protocol for dewatering cryo-preserved plant tissues using liquefied dimethyl ether (DME). Prior to dewatering from frozen plant materials, we have examined the efficiency of liquefied DME for cryogenic removal of water from ice cubes. Here, lemon peel residue (consisting of flavedo and albedo) was chosen as the model plant material for dewatering and concomitant extractions of water-soluble components such as ascorbate and citric acid and hydrophobic components, chiefly, essential oils (EOs). By focusing on the exploitation of unused resources after food processing, the juice extraction residues from lemon fruits (lemon peels) were used as the starting materials. The yield of vitamin C (VC) extracted from the peel tissues derived from a single lemon fruit exceeded the amount of VC found in the manually press-extracted juice from a single lemon fruit. The major components in DME-extracted crude lemon EOs were determined and quantified with gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detector (GC-FID) to be limonene (40.4%, w/w), β-pinene (10.4%, w/w), and γ-terpinene (6.9 %, w/w).

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Oxidative dimerization of dimethyl ether with solid catalysts

Cited by 22 publications

References 9 publications

Fabrication of Fe₃O₄‐l‐dopa‐Cu^II/Sn^IV@Micro‐Mesoporous‐SiO₂ Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Fabrication of Fe₃O₄‐l‐dopa‐Cu^II/Sn^IV@Micro‐Mesoporous‐SiO₂ Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Synthesis of Polyoxymethylene Dimethyl Ethers from Dimethyl Ether Direct Oxidation over Carbon‐Based Catalysts

Dewatering and Extraction of Hydrophilic Solutes and Essential Oils from Cryo-preserved Lemon Peels Using Liquefied Dimethyl Ether

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Oxidative dimerization of dimethyl ether with solid catalysts

Cited by 22 publications

References 9 publications

Fabrication of Fe3O4‐l‐dopa‐CuII/SnIV@Micro‐Mesoporous‐SiO2 Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Fabrication of Fe3O4‐l‐dopa‐CuII/SnIV@Micro‐Mesoporous‐SiO2 Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Synthesis of Polyoxymethylene Dimethyl Ethers from Dimethyl Ether Direct Oxidation over Carbon‐Based Catalysts

Dewatering and Extraction of Hydrophilic Solutes and Essential Oils from Cryo-preserved Lemon Peels Using Liquefied Dimethyl Ether

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Fabrication of Fe₃O₄‐l‐dopa‐Cu^II/Sn^IV@Micro‐Mesoporous‐SiO₂ Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Fabrication of Fe₃O₄‐l‐dopa‐Cu^II/Sn^IV@Micro‐Mesoporous‐SiO₂ Catalyst Applied to Baeyer–Villiger Oxidation Reaction