公开(公告)号：US20020016520A1

公开(公告)日：2002-02-07

申请号：US09879190

申请日：2001-06-13

Applicant: SNAMPROGETTI S.p.A.

Inventor： Alberto Paggini ,  Domenico Sanfilippo ,  Elena Picciotto

IPC: C07C002/64

CPC classification number: C07C15/085 ,  C07C2521/04 ,  C07C2523/04 ,  C07C2523/14 ,  C07C2523/26 ,  C07C2523/42 ,  C07C2523/62 ,  Y02P20/125

Abstract: Integrated process for the preparation of cumene which comprises dehydrogenating a stream of propane to propylene in a dehydrogenation unit and sending the stream leaving the dehydrogenation unit, containing 25-40% by weight of propylene, to an alkylation unit together with a stream of benzene with a molar ratio benzene/propylene ranging from 8 to 10. The alkylation product is distilled in a first distillation column to recover a light fraction, essentially consisting of propane which is recycled to the dehydrogenation, and a heavy fraction which is distilled in a second distillation column to recover non-reacted benzene at the head, recycled to the alkylation unit, and cumene with a purity of over 99%, at the tail.

Abstract translation: 用于制备异丙基苯的综合方法，其包括在脱氢单元中将丙烷流脱氢为丙烯，并将含有25-40重量％丙烯的离开脱氢单元的料流与苯流一起送入烷基化单元 苯/丙烯的摩尔比在8至10之间。烷基化产物在第一蒸馏塔中蒸馏以回收基本上由循环至脱氢的丙烷组成的轻馏分和在第二蒸馏中蒸馏的重馏分 柱，在尾部回收未反应的苯，再循环至烷基化单元，纯度为99％以上的枯烯。