公开(公告)号：AT302178T

公开(公告)日：2005-09-15

申请号：AT00958412

申请日：2000-08-10

Applicant: BASF AG

Inventor： PESCHEL WERNER ,  BESSLING BERND ,  REUTER PETER ,  LORZ PETER MICHAEL ,  ULRICH BERNHARD ,  KNAB JEAN WERNER ,  KUMMER MATTHIAS ,  RUEHL THOMAS

IPC: B01D3/00 ,  B01D3/10 ,  B01D3/14 ,  C07C51/573 ,  C07C63/16 ,  C07D307/89

Abstract: On-spec phthalic anhydride is prepared by distillative purification of crude phthalic anhydride by a process in which crude phthalic anhydride is fed to a distillation column which is operated at reduced pressure, the low boilers are removed at the top or in the vicinity of the top of the distillation column and the on-spec phthalic anhydride is removed from the column via a side take-off.

公开(公告)号：DE10315214A1

公开(公告)日：2004-10-14

申请号：DE10315214

申请日：2003-04-03

Applicant: BASF AG

Inventor： PESCHEL WERNER ,  SCHOENMAKERS HARTMUT ,  ALTHAUS KLAUS ,  KIRCHNER TANJA ,  STAATZ HARTMUT

IPC: C07C231/24 ,  C07C233/05 ,  C07C233/03 ,  B01D3/14

Abstract: The invention relates to a process for distillatively purifying crude dimethylacetamide (crude DMAc) comprising DMAc, low boilers and high boilers 5 by removing the low boilers and the high boilers to obtain pure DMAc in one of the column configurations listed hereinbelow: (I) a main column (MC) with sidestream column (SC) or (II) a dividing wall column (DWC), which operating at least the main column (MC) in column configuration (I) and the dividing wall column (DWC) in column configuration (II) at a top pressure in the range from 0.5 to 1.8 bar absolute.

公开(公告)号：DE50003261D1

公开(公告)日：2003-09-18

申请号：DE50003261

申请日：2000-02-28

Applicant: BASF AG

Inventor： HEIMANN FRANK ,  PESCHEL WERNER ,  BARTENBACH BERND ,  HARTMANN HORST ,  KEIL MICHAEL ,  WAHL JOSEF

IPC: B01D3/14 ,  B01D3/20 ,  C07C239/20

Abstract: The present invention relates to a process for the continuous preparation of methoxyamine hydrochloride by cleavage of acetone oxime methyl ether by means of hydrogen chloride and water, wherein the cleavage is carried out in a reaction column having less than 20 theoretical plates and the amount taken off at the top is set to at least 30% of the amount of feed.

公开(公告)号：HU0200621A2

公开(公告)日：2002-07-29

申请号：HU0200621

申请日：2000-02-28

Applicant: BASF AG

Inventor： BARTENBACH BERND ,  HARTMANN HORST ,  DR HEIMANN FRANK ,  DR KEIL MICHAEL ,  PESCHEL WERNER ,  WAHL JOSEF

IPC: B01D3/14 ,  B01D3/20 ,  C07C239/20

Abstract: The present invention relates to a process for the continuous preparation of methoxyamine hydrochloride by cleavage of acetone oxime methyl ether by means of hydrogen chloride and water, wherein the cleavage is carried out in a reaction column having less than 20 theoretical plates and the amount taken off at the top is set to at least 30% of the amount of feed.

公开(公告)号：AU3160900A

公开(公告)日：2000-10-04

申请号：AU3160900

申请日：2000-02-28

Applicant: BASF AG

Inventor： HEIMANN FRANK ,  PESCHEL WERNER ,  BARTENBACH BERND ,  HARTMANN HORST ,  KEIL MICHAEL ,  WAHL JOSEF

IPC: B01D3/14 ,  B01D3/20 ,  C07C239/20

Abstract: The present invention relates to a process for the continuous preparation of methoxyamine hydrochloride by cleavage of acetone oxime methyl ether by means of hydrogen chloride and water, wherein the cleavage is carried out in a reaction column having less than 20 theoretical plates and the amount taken off at the top is set to at least 30% of the amount of feed.

公开(公告)号：DE19911234A1

公开(公告)日：2000-09-28

申请号：DE19911234

申请日：1999-03-15

Applicant: BASF AG

Inventor： HEIMANN FRANK ,  PESCHEL WERNER ,  BARTENBACH BERND ,  HARTMANN HORST ,  KEIL MICHAEL ,  WAHL JOSEF

IPC: B01D3/14 ,  B01D3/20 ,  C07C239/20

Abstract: The invention relates to a method for the continuous production of methoxyamine hydrochloride by dissociating acetone oxime dimethyl ether with hydrogen chloride and water. The inventive method is characterized by carrying out the dissociation step in a reactor column of less than 20 theoretical steps of separation and adjusting the overhead removal amount to at least 30 % of the quantity supplied.