摘要:
A process for preparing low-water ethanol from at least two streams of relatively water-rich ethanol that have a different water content by dewatering at membranes. The low-water ethanol can be used to prepare ethyl tert-butyl ether (ETBE).
摘要:
In a method for the production of propylene, a charge stream containing C4 to C6 olefins is evaporated, superheated, mixed with hot water vapor, the olefins vapor mixture converted on a zeolite catalyst, the reaction mixture formed thereby cooled, and then partially condensed. In order to increase the yield of propylene, the gaseous phase containing ethylene, propylene, C4 to C8 olefins, and additional hydrocarbons that is accumulated during the partial condensation is compressed, the gaseous and liquid phase containing propylene, ethylene, and other light hydrocarbons that exit from the compression step is separated into a gaseous phase containing propylene, ethylene, and other light hydrocarbons and a liquid phase containing C4+ olefins, and the liquid phase is separated into a fraction containing C4 to C6 olefins and a fraction containing C7+ olefins.
摘要翻译:在制备丙烯的方法中,将含有C 4 -C 6烯烃的电荷流蒸发,过热,与热水蒸气混合,将烯烃蒸气混合物转化为 沸石催化剂,由此形成的反应混合物冷却,然后部分冷凝。 为了提高丙烯的产率,含有乙烯,丙烯,C 4 -C 8烯烃的气相和在部分冷凝期间积聚的其它烃被压缩 含有丙烯,乙烯和从压缩步骤出来的其它轻烃的气相和液相被分离成含有丙烯,乙烯和其它轻质烃的气相和含有C 4 +烯烃,并将液相分离成含有C 4 O 6至C 6 O 6烯烃的馏分和含有C 7+烯烃的级分。