公开(公告)号：BR0312830A

公开(公告)日：2005-04-26

申请号：BR0312830

申请日：2003-07-22

Applicant: BASF AG

Inventor： ADRIAN TILL ,  HILLMER THOMAS ,  KINDLER KLAUS ,  HEIDA BERND

IPC: B01D3/40 ,  C07C5/22 ,  C07C7/08

Abstract: In a continuous process for fractionating a C4 fraction (C4) by extractive distillation using a selective solvent (LM) in an extractive distillation column (EDK), it is proposed that a dividing wall (TW) is installed in the longitudinal direction in the extractive distillation column (EDK) to form a first region (A), a second region (B) and a lower combined column region (C) and a top stream (C4H10) comprising the butanes is taken off from the first region (A), a top stream (C4H8) comprising the butenes is taken off from the second region (B) and a stream (C4H6) comprising the hydrocarbons from the C4 fraction which are more soluble in the selective solvent (LM) than are the butanes and the butenes is taken off from the lower combined column region (C).

公开(公告)号：BR0307813A

公开(公告)日：2004-12-21

申请号：BR0307813

申请日：2003-02-28

Applicant: BASF AG

Inventor： PESCHEL WERNER ,  ADRIAN TILL ,  RUST HARALD ,  TTCHER ARND B ,  HILLMER THOMAS ,  LLER ULRICH M ,  PAPP RAINER

IPC: C07C5/11 ,  C07B61/00 ,  C07C29/04 ,  C07C35/08 ,  C07C13/20

Abstract: A process for preparing cyclohexanol from benzene by: a) preparing cyclohexene by hydrogenating benzene in the presence of a catalyst, and b) preparing cyclohexanol by hydrating the cyclohexene in the presence of a catalyst, comprises: carrying out steps a) and b) in a reaction facility which has a bottom region at the lower end, a top region at the upper end, and a reaction zone between the top region and the bottom region which contains the catalyst according to steps a) and b), evaporating a portion of the benzene using the heat of reaction in the reaction zone, condensing it in the top region and returning it to the reaction zone, and withdrawing a reaction mixture containing cyclohexanol in the bottom region.