Multifunctional Reactor for the Synthesis of Dimethylacetal

Abstract

The synthesis of dimethylacetal (1,1-dimethoxyethane) was performed in a Simulated Moving Bed Reactor (SMBR) pilot unit LICOSEP 12-26 (Novasep, France) with 12 columns packed with the acid resin Amberlyst-15 wet (Rohm & Haas, France). For the operating conditions used, the performance parameters obtained were as follows: acetal purity, 91.41%; productivity rate, 5.17 kgacetal/(Ladsorbent day); and desorbent consumption, 7.11 Lmethanol/kgacetal. The effect of the switching time, feed composition, and desorbent flow rate in the performance of the SMBR was studied by means of two mathematical models approaches: the SMBR model (for the concentration profiles and performance parameters) and the True Moving Bed Reactor (TMBR) model (for the reaction separation regions).

Sorption enhanced reactive process for the synthesis of glycerol ethyl acetal

“…In most of the aforementioned works, advantage is taken from the sorption and catalytic properties of ion exchange resins. This dual behaviour presented by this type of materials, especially by Amberlyst-15, has demonstrated to be particularly effective, even for more complex chromatographic reactors as the simulated moving bed reactor [21][22][23][24][25][26][27][28]. Such ion exchange resins are constituted by crosslinked styrene divinylbenzene copolymers functionalized with acid sulfonic groups.…”

Simulated Moving Bed Chromatography: From Concept to Proof‐of‐Concept

“…This intensified reaction-separation technology adopts the name simulated moving bed reactor (SMBR). A considerable number of applications have been reported considering SMBRs, among others: enzymatic reaction for higher-fructose syrup production [137][138][139][140], intensified synthesis of fructooligosaccharides [12], esterification from acetic acid and b-phenethyl alcohol to produce b-phenethyl acetate [141] or methyl/ethyl acetate ester from methanol/ethanol [142][143][144], synthesis and separation of methanol from syngas [145], lactosucrose production [146], MTBE synthesis [147], diethylacetal (dimethylacetal) synthesis [148][149][150][151], ethyl lactate synthesis from lactic acid and ethanol [152], biodiesel synthesis [153,154], in situ isomerization and separation of p-xylene [155,156], and, more recently, in the production of single enantiomers [157]. These examples prove the potential of this technique.…”

A novel process for the ethyl lactate synthesis in a simulated moving bed reactor (SMBR)

“…The extension of the SMB technology to integrate reaction and separation steps into a single apparatus led to the simulated moving bed reactor (SMBR). This chromatographic reactor gained more and more attention in the last years because of their potential to improve process efficiency, as in case of esterifications (Dunnebier et al, 2000;Kawase et al, 1996;Lode et al, 2001Lode et al, , 2003Mazzotti et al, 1996;Meissner and Carta, 2002;Migliorini et al, 1999;Yu et al, 2003), etherifications (Zhang et al, 2001), sugars (Azevedo and Rodrigues, 2001;Da Silva et al, 2005Dunnebier et al, 2000;Pilgrim et al, 2006;Zhang et al, 2004), bisphenol A (Kawase et al, 1999) and acetals (Pereira et al, 2008a;Rodrigues and Silva, 2005;Silva and Rodrigues, 2005) and will be applied in this work on the synthesis of the green solvent ethyl lactate. A schematic diagram of a SMBR unit is presented in Fig.…”