Process for the production of 1-butene

摘要

Preparation of 1-butene from a mixture of 1-butene and 2-butene involves feeding a hydrocarbon feed stream and 1- and 2-butene recycle stream into a distillation column and taking off the streams, where the 1-butene content of the stream is higher than that of the hydrocarbon feed stream, and producing the hydrocarbon recycle stream by bringing the feed stream into contact with an isomerization catalyst to convert 2-butenes into 1-butene. Preparation of a 1-butene-containing 4C hydrocarbon stream (1-C4= stream) from a 1-butene- and 2-butene-containing 4C hydrocarbon stream (1- and 2-C4= feed stream) whose 1-butene content is lower than that of the 1-C4= stream, by: (a) feeding the 1- and 2-C4= feed stream and a 1-butene- and 2-butene-containing C4 hydrocarbon stream (1- and 2-C4= recycle stream) whose 1-butene content is lower than that of the 1-C4= stream and which has been produced by step (b) below into a distillation column and taking off the 1-C4= stream and a 2-butene-containing 4C hydrocarbon stream (2-C4= stream) whose 1-butene content is lower than that of the 1- and 2-C4= feed stream and of the 1- and 2-C4= recycle stream from the distillation column; and (b) producing the 1- and 2-C4= recycle stream from the 2-C4= stream by bringing the 2-C4= stream into contact with an isomerization catalyst which catalyzes the conversion of 2-butenes into 1-butene in a reaction zone.