A process for preparing ethers includes the steps of: providing a feedstock containing iso-olefins selected from the group consisting of C5 iso-olefins, C6 iso-olefins and mixtures thereof; mixing the feedstock with alkyl alcohol so as to provide a reaction feedstock, feeding the reaction feedstock to a reactor zone in the presence of a first etherification catalyst whereby the alkyl alcohol reacts with the iso-olefins to form alkyl-tert-alkyl ethers so as to provide an intermediate feedstock containing the ethers and unreacted iso-olefins and alkyl alcohol; feeding the intermediate feedstock to a catalytic distillation column having a second etherification catalyst defining a catalytic zone; mixing additional alkyl alcohol to the intermediate feedstock so as to form azeotropes of the alkyl alcohol with the unreacted iso-olefins without forming azeotropes of the alkyl alcohol with the ethers whereby the catalytic zone is substantially free of the ethers and the unreacted iso-olefins react with said alkyl alcohol in the catalytic zone to form additional alkyl-tert-alkyl ethers.
制备醚的工艺包括以下步骤提供含有选自 C5 异烯烃、C6 异烯烃及其混合物的异烯烃的原料;将原料与烷基醇混合以提供反应原料,在第一醚化催化剂存在下将反应原料送入反应器区,烷基醇与异烯烃反应形成烷基-叔-烷基醚,以提供含有醚和未反应的异烯烃及烷基醇的中间原料;将中间原料送入催化蒸馏塔,该塔具有第
二醚化催化剂,并限定了一个催化区;将额外的烷基醇与中间原料混合,以形成烷基醇与未反应的异烯烃的共沸物,而不形成烷基醇与醚的共沸物,从而使催化区基本上不含醚,未反应的异烯烃与催化区中的所述烷基醇反应,形成额外的烷基-叔-烷基醚。