Conceptual design of a crystallization-based trioxane production process

Breitkreuz, Christian F.; Dyga, Maximilian; Forte, Esther; Jirasek, Fabian; Bont, Jan de; Wery, Jan; Grützner, Thomas; Burger, Jakob; Hasse, Hans

doi:10.1016/j.cep.2021.108710

Cited by 3 publications

(6 citation statements)

References 30 publications

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“…However, in this case H 2 O needs to be separated from the feedstock before entering the OME reactor, which is especially energy intense for the production of reactant TRI. 30,38…”

Section: Theory and Backgroundmentioning

confidence: 99%

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Suitable commercial catalysts for the synthesis of oxymethylene dimethyl ethers

et al. 2023

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“…However, in this case H 2 O needs to be separated from the feedstock before entering the OME reactor, which is especially energy intense for the production of reactant TRI. 30,38…”

Section: Theory and Backgroundmentioning

confidence: 99%

“…However, in this case H 2 O needs to be separated from the feedstock before entering the OME reactor, which is especially energy intense for the production of reactant TRI. 30,38 In the present work two reaction systems were investigated with MeOH and pFA as a typical aqueous system and OME 1 and TRI as a typical anhydrous system.…”

Section: Synthesis Of Omementioning

confidence: 99%

Suitable commercial catalysts for the synthesis of oxymethylene dimethyl ethers

et al. 2023

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“…19,39 Therefore, H 2 O is introduced into the TRI synthesis and separated in an energy-intensive cascade of distillation columns. 28,40 Only in the anhydrous FA synthesis, which is still in its very early stages, no H 2 O is present. 41 Regarding the synthesis of OME ≥2 , H 2 O is not formed as a by-product when the oxymethylene group suppliers TRI or monomeric FA are combined with the methyl group suppliers DME or OME 1 , as described by eqn (7) and (8).…”

Section: H 2 O Separation From the Production Of Omementioning

confidence: 99%

A novel process towards the industrial realization of large-scale oxymethylene dimethyl ether production – COMET

Mantei,

Schwarz,

Elwalily

et al. 2023

React. Chem. Eng.

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“…Trioxane (TRX), the cyclic trimer of formaldehyde, is a convenient source of water-free formaldehyde and is used as such on a large scale in the industry, mainly for the synthesis of polymers. Several processes for its production have been described in the literature. , Recently, an efficient crystallization-based trioxane process has been developed . Paraformaldehyde is less costly than TRX but, as it consists of long-chain poly(oxymethylene) glycols, it always introduces small amounts of water into the process.…”

Section: Introductionmentioning

confidence: 99%

“…32,33 Recently, an efficient crystallization-based trioxane process has been developed. 34 Paraformaldehyde is less costly than TRX but, as it consists of long-chain poly(oxymethylene) glycols, it always introduces small amounts of water into the process. Producing and using monomeric formaldehyde is difficult.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of Methylal and Poly(oxymethylene) Dimethyl Ethers from Dimethyl Ether and Trioxane

Breitkreuz

Hevert

Schmitz

et al. 2022

Ind. Eng. Chem. Res.

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Poly(oxymethylene) dimethyl ethers (OME) are interesting synthetic fuels that could replace fossil diesel fuel. Therefore, economic routes for OME production have to be developed. One particularly interesting route is the synthesis of OME from dimethyl ether (DME) and formaldehyde. The principal feasibility of this route is established, but the physicochemical information on essential steps is still lacking. In particular, there is no data on the first step in this synthesis, which is the formation of methylal (MAL) from DME and formaldehyde. Kinetic batch experiments were carried out in a stirred batch autoclave with a commercially available acidic ion-exchange resin as a catalyst in the temperature range of 353−373 K for up to 200 h. Trioxane was used as a water-free source of formaldehyde. Due to the volatility of DME, the experiments were carried out under pressure; high-pressure magnetic resonance (NMR) spectroscopy was applied for the analysis. During the reaction, not only MAL but also OME are formed, as well as a side product, methyl formate (MeFo). Therefore, the equilibrium constant of the MAL formation had to be determined based on a reaction kinetic model of the entire reaction network. The formation of MAL was found to have a larger equilibrium constant than the subsequent oligomerization reactions leading to OME, but it is also much slower than these reactions.

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Conceptual design of a crystallization-based trioxane production process

Cited by 3 publications

References 30 publications

Suitable commercial catalysts for the synthesis of oxymethylene dimethyl ethers

Suitable commercial catalysts for the synthesis of oxymethylene dimethyl ethers

A novel process towards the industrial realization of large-scale oxymethylene dimethyl ether production – COMET

Synthesis of Methylal and Poly(oxymethylene) Dimethyl Ethers from Dimethyl Ether and Trioxane

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