公开(公告)号：DE3147323A1

公开(公告)日：1983-06-01

申请号：DE3147323

申请日：1981-11-28

Applicant: BASF AG

Inventor： FREY WALTER DIPL ING DR ,  STRAUB FERDINAND DIPL ING DR ,  SCHWETER WALTER DIPL CHEM DR ,  NIKLES ALBERT DIPL ING ,  HILPRECHT LUTZ DIPL ING DR ,  ENGLERT KURT

IPC: C07C5/327 ,  C07C5/333 ,  C07C15/46

Abstract: Process for the preparation of styrene by dehydrogenation of ethylbenzene in the presence of steam at elevated temperatures, in which the mixture of ethylbenzene and water to be fed into the reaction zone is evaporated and heated by means of the reaction mixture discharged from the reaction zone and water is evaporated at a pressure of 0.4 to 1.2 bar using the cooled reaction mixture, the vapour is compressed and brought to elevated temperatures, mixed with ethylbenzene and water, and the mixture is evaporated and fed into the reaction zone.