公开(公告)号：MY137758A

公开(公告)日：2009-03-31

申请号：MYPI20045398

申请日：2004-12-29

Applicant: BASF AG

Inventor： JOHANN THORSTEN DR ,  SCHINDLER GOETZ-PETER DR ,  BRODHAGEN ANDREAS DR ,  CRONE SVEN DR ,  DUDA MARK DR

IPC: C07C5/333 ,  C07C5/48 ,  C07C11/167

Abstract: THE INVENTION RELATES TO A PROCESS FOR PREPARING BUTADIENE FROM N-BUTANE HAVING THE STEPS OFA) PROVIDING A FEED GAS STREAM A COMPRISING N-BUTANE;@B) FEEDING THE FEED GAS STREAM A COMPRISING N-BUTANE INTO AT LEAST ONE FIRST DEHYDROGENATION ZONE AND NONOXIDATIVELY CATALYTICALLY DEHYDROGENATING N-BUTANE TO OBTAIN A PRODUCT GAS STREAM B COMPRISING N-BUTANE,I-BUTANE,2-BUTENE,BUTADIENE,HYDROGEN, LOW-BOILING SECONDARY CONSTITUENTS AND IN SOME CASES STEAM;@C) FEEDING THE PRODUCT GAS STREAM B OF THE NONOXIDATIVE CATALYTIC DEHYDROGENATION AND AN OXYGENOUS GAS INTO AT LEAST ONE SECOND DEHYDROGENATION ZONE AND AN OXIDATIVELY DEHYROGENATING I-BUTENE AND 2-BUTENE TO OBTAIN A PRODUCT GAS STREAM C COMPRISING N-BUTANE,2-BUTENE,BUTADIENE,HYDROGEN, LOW-BOILING SECONDARY CONSTITUENS AND STEAM,SAID PRODUCT GAS STREAM C HAVING A HIGHER CONTENT OF BUTADIENE THAN THE PRODUCT GAS STREAM B;@D) REMOVING HYDROGEN, THE LOW-BOILING SECONDARY CONSTITUENTS AND STEAM TO OBTAIN A C4 PRODUCT GAS STREAM D SUBSTANTIALLY CONSISTING OF N-BUTANE,2-BUTENE AND BUTADIENE;@E) FEEDING THE C4 PRODUCT GAS STREAM D INTO A DISTILLATION ZONE AND REMOVING A BUTADIENE/BUTANE MIXTURE AS THE PRODUCT OF VALUE STREAM E1,TO LEAVE A STREAM E2 CONSISTING SUBSTANTIALLY OF N- BUTANE AND 2-BUTENE;@F) RECYCLING THESTREAM E2 INTO THE FIRST DEHYDROGENATION ZONE.