Production of ethyl tertiary alkyl ethers

C - Chemistry – Metallurgy – 07 – C

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260/648, 202/73

C07C 41/06 (2006.01) B01D 3/40 (2006.01) C07C 43/04 (2006.01)

Patent

CA 2037091

Crude aqueous ethanol feedstock is reacted with iso-olefinic hydrocarbons to produce C6+ ethyl t-alkyl ethers by distilling the feedstock, contacting ethanol rich distillate overhead containing a minor amount of water with a liquid hydrocarbon extractant rich in C4+ isoalkene under liquid extraction conditions, recovering an aqueous phase containing water introduced from the overhead, recovering an organic extract phase comprising the hydrocarbon extractant and a major amount of ethanol introduced in the feedstock, and reacting the extracted ethanol and C4+ isoalkene in contact with an acid etherification catalyst under catalytic reaction conditions to produce ether product.

Une charge d'alimentation d'éthanol aqueux brut est mis en réaction avec des hydrocarbures iso- oléfiniques pour produire des éthers C6+ ethyl t-alkyl en distillant la charge d'alimentation, en contact avec un distillat de tête riche en éthanol contenant une quantité minime d'eau avec un extractant d'hydrocarbure liquide riche en C4+ isoalkène dans des conditions d'extraction liquide, recouvrant une phase aqueuse contenant de l'eau introduite à partir du distillat de tête, recouvrant une phase d'extraction organique comprenant l'extractant d'hydrocarbure et une quantité importante d'éthanol introduite dans la charge d'alimentation et réagissant avec l'éthanol extrait C4+ isoalkène en contact avec un catalyseur d'éthérification acide sous des conditions catalytiques pour produire un produit d'éther.

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