PREPARATION OF BUTADIENE
    3.
    发明专利

    公开(公告)号:MY140092A

    公开(公告)日:2009-11-30

    申请号:MYPI20045270

    申请日:2004-12-21

    Applicant: BASF AG

    Abstract: The disclosure relates to a process for preparing butadiene. The process involves nonoxidatively catalytically dehydrogenating butane to obtain a product gas stream containing butane, 1-butene, 2-butene, butadiene, hydrogen and secondary constituents. The 1-butene and 2-butene of the product gas stream is then oxidatively dehydrogenated to give a second gas stream containing butane,2-butene, butadiene, hydrogen, steam and secondary constituents. Next, the butane,2-butene and butadiene are separated from the second gas stream and the butane and 2-butene are then separated from the butadiene product. The butane and 2-butene are then recycled into the nonoxidative catalytic dehydrogenating zone.

    PREPARATION OF BUTADIENE
    4.
    发明专利

    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

    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.

Patent Agency Ranking