公开(公告)号：DE10219375A1

公开(公告)日：2003-11-13

申请号：DE10219375

申请日：2002-04-30

Applicant: BASF AG

Inventor： TILL ADRIAN ,  HEIDA BERND ,  KINDLER KLAUS

IPC: B01D3/14 ,  B01D3/40 ,  C07C7/08 ,  C07C9/10 ,  C07C11/08

Abstract: A continuous process for isolating butenes from a C 4 fraction comprising butanes, butenes and other C 3 -C 5 -hydrocarbons by extractive distillation using a selective solvent (LM), comprising a first process stage I in a scrubbing zone (E) and a second process stage II in a degassing zone (A), wherein the liquid or a substream of the liquid is taken off from the degassing zone (A) at a theoretical plate located one or more theoretical plates below the feed point for the bottom stream (LM/C 4 H 8 ) from the scrubbing zone (E), heated and/or vaporized by indirect heat exchange with the hot bottom stream (LM) from the degassing zone (A) and returned to the degassing zone (A) at the same theoretical plate or above this, with the theoretical plate from which the liquid or substream of liquid is taken off being selected so that the total energy requirement in the process stages I and II is minimized, is proposed.

公开(公告)号：AR020654A1

公开(公告)日：2002-05-22

申请号：ARP990104762

申请日：1999-09-22

Applicant: BASF AG

Inventor： TILL ADRIAN ,  BESSLING BERND ,  HASSE HANS VANSANT ,  FRANS THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

公开(公告)号：DE10002795A1

公开(公告)日：2001-08-02

申请号：DE10002795

申请日：2000-01-24

Applicant: BASF AG

Inventor： AUER HEINZ ,  BESLING BERND ,  HAMMER HANS ,  HASSE HANS ,  SAUER FRIEDRICH ,  VICARI MAXIMILIAN ,  WAGNER GERHARD ,  TILL ADRIAN

IPC: C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C22C14/00 ,  C22C38/00 ,  C22C38/42 ,  C22C38/44 ,  C07C53/02 ,  C07C233/01 ,  B01J19/02

Abstract: The invention concerns a device and a method for obtaining anhydrous or substantially anhydrous formic acid. Said device is partly or totally made of a zirconium-free material. A liquid material of general formula (I) is used as extracting agent, wherein radicals R and R represent alkyl, cycloalkyl, aryl or aralkyl groups or R and R together form with the N atom a heterocyclic five or six-membered ring and in which only one of the radicals is an aryl group and in which R stands for hydrogen or a C1-C4-alkyl group. The device comprises the following: (i) a synthesis reactor (6); (ii) a hydrolysis reactor (1); (iii) a first distillation device (2); (iv) a second distillation device (4); (v) an extraction device (3) and (vi) a third distillation device (5).