| 摘要 |
PROBLEM TO BE SOLVED: To provide a new method for synthesizing ethyl t-butyl ether (ETBE) by using an aqueous ethanol, and a device for the same. SOLUTION: This method for synthesizing ETBE is provided by using a C4 component such as the C4 component, etc., consisting mainly of isobutene (IB) and obtained by pressurizing/liquefying at a normal temperature, and the aqueous ethanol (EtOH) which is a rectified material of bioethanol, as raw materials. By using a reaction device (a reaction column) 14 equipped with a fixed catalytic reaction stage 22, the ETBE together with t-butyl alcohol (TBA) are synthesized by performing the liquid phase reaction of IB with EtOH and water stoichiometrically under the mild conditions of a middle pressure (≥1,000 kPa) and middle temperature (≥100°C). By using a multiple number of distillation columns equipped with water-washing column, which becomes an azeotropic distillation process, after the synthesis of ETBE accompanying TBA, the dehydration of the raw material EtOH by the azeotropic distillation process is made as unnecessary. COPYRIGHT: (C)2006,JPO&NCIPI
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