公开(公告)号：EP1204628B1

公开(公告)日：2005-08-17

申请号：EP00958412.9

申请日：2000-08-10

申请人： BASF AKTIENGESELLSCHAFT

发明人： PESCHEL, Werner ,  BESSLING, Bernd ,  REUTER, Peter ,  LORZ, Peter, Michael ,  ULRICH, Bernhard ,  KNAB, Jean, Werner ,  KUMMER, Matthias ,  RÜHL, Thomas

IPC分类号： C07C51/573 ,  C07C63/16 ,  B01D3/14

CPC分类号： C07D307/89

摘要： The invention relates to a method for producing phthalic anhydride according to specifications by the distillative purification of crude phthalic anhydride. According to said method, crude phthalic anhydride is fed to a distillation column which is operated at a reduced pressure, then the low-boiling constituents at the head or in the vicinity of the head of the distillation column are removed and the phthalic anhydride which conforms to specifications is recovered from the column through a lateral vent.

公开(公告)号：EP0996607B1

公开(公告)日：2001-11-14

申请号：EP98940135.1

申请日：1998-07-03

申请人： BASF AKTIENGESELLSCHAFT

发明人： BESSLING, Bernd ,  KNAB, Jean, Werner ,  BROX, Wolfgang ,  LOHE, Bernd

IPC分类号： C07C11/09 ,  C07C7/148

CPC分类号： C07C7/14891 ,  Y02P20/127 ,  C07C11/09

摘要： The invention relates to a method for obtaining isobutene from conjugated hydrocarbons. Said method comprises the following steps; a) placing C4-hydrocarbon with a C3- or C4-primary alkanol; b) reacting isobutene in conjugated C4-hydrocarbons with C3- or C4-primary alkanol in the presence of a heterogeneous catalyst to obtain the corresponding isobutene-based tertiary ether; c) causing fractionation of the accumulated reaction mixture into non ethereal C4-hydrocarbons with a low boiling point and isobutene-based tertiary ether with a high boiling point by using a fractionating tower, said C4-hydrocarbons being removed by the head while the isobutene-based tertiary ether accumulated on the bottom is fed into a reactor; d) causing fission of said ether, thereby obtaining isobutene and the corresponding primary C3-C4-alkanol; e) distilling the blending resulting from step d) by using another fractionating tower, and removing the isobutene as an overhead. Step a) is carried out in an area (4C) containing the reaction ingredients in which the catalyst is placed to complete step b); the area (4C) is part of a fractionating tower (4); in said area (4C9 is effected a reaction fractionation; C3- or C4-alkanol is fed upstream from area (4C) of the fractionating tower (4), and the conjugated C4-hydrocarbons downstream from said area (4C).

公开(公告)号：EP0996607A1

公开(公告)日：2000-05-03

申请号：EP98940135.1

申请日：1998-07-03

申请人： BASF AKTIENGESELLSCHAFT

发明人： BESSLING, Bernd ,  KNAB, Jean, Werner ,  BROX, Wolfgang ,  LOHE, Bernd

IPC分类号： C07C11/09 ,  C07C7/148

CPC分类号： C07C7/14891 ,  Y02P20/127 ,  C07C11/09

摘要： The invention relates to a method for obtaining isobutene from conjugated hydrocarbons. Said method comprises the following steps; a) placing C4-hydrocarbon with a C3- or C4-primary alkanol; b) reacting isobutene in conjugated C4-hydrocarbons with C3- or C4-primary alkanol in the presence of a heterogeneous catalyst to obtain the corresponding isobutene-based tertiary ether; c) causing fractionation of the accumulated reaction mixture into non ethereal C4-hydrocarbons with a low boiling point and isobutene-based tertiary ether with a high boiling point by using a fractionating tower, said C4-hydrocarbons being removed by the head while the isobutene-based tertiary ether accumulated on the bottom is fed into a reactor; d) causing fission of said ether, thereby obtaining isobutene and the corresponding primary C3-C4-alkanol; e) distilling the blending resulting from step d) by using another fractionating tower, and removing the isobutene as an overhead. Step a) is carried out in an area (4C) containing the reaction ingredients in which the catalyst is placed to complete step b); the area (4C) is part of a fractionating tower (4); in said area (4C9 is effected a reaction fractionation; C3- or C4-alkanol is fed upstream from area (4C) of the fractionating tower (4), and the conjugated C4-hydrocarbons downstream from said area (4C).

公开(公告)号：EP1204628A1

公开(公告)日：2002-05-15

申请号：EP00958412.9

申请日：2000-08-10

申请人： BASF AKTIENGESELLSCHAFT

发明人： PESCHEL, Werner ,  BESSLING, Bernd ,  REUTER, Peter ,  LORZ, Peter, Michael ,  ULRICH, Bernhard ,  KNAB, Jean, Werner ,  KUMMER, Matthias ,  RÜHL, Thomas

IPC分类号： C07C51/573 ,  C07C63/16 ,  B01D3/14

CPC分类号： C07D307/89

摘要： The invention relates to a method for producing phthalic anhydride according to specifications by the distillative purification of crude phthalic anhydride. According to said method, crude phthalic anhydride is fed to a distillation column which is operated at a reduced pressure, then the low-boiling constituents at the head or in the vicinity of the head of the distillation column are removed and the phthalic anhydride which conforms to specifications is recovered from the column through a lateral vent.