公开(公告)号：MY126926A

公开(公告)日：2006-10-31

申请号：MYPI20011883

申请日：2001-04-20

Applicant: BASF AG

Inventor： DR GERD KAIBEL ,  ALEXANDER WECK ,  DR RALF-THOMAS RAHN

IPC: C07D307/08 ,  B01D3/14 ,  B01D3/26 ,  B01D3/42 ,  C07C27/28 ,  C07C29/80 ,  C07C31/20 ,  C07D307/33

Abstract: IN A PROCESS FOR THE CONTINUOUS FRACTIONAL DISTILLATION OF MIXTURES COMPRISING TETRAHYROFURAN, ?-BUTYROLACTONE AND/OR 1,4-BUTANEDIOL TO GIVE AT LEAST THREE FRACTIONS, THE FRACTIONATION IS CARRIED OUT IN AN ASSEMBLY OF DISTLLATION COLUMNS (K1A, K1B, K2, K3) COMPRISING AT LEAST ONE DIVIDING WALL COLUMN OR AT LEAST ONE ASSEMBLY OF THERMALLY COUPLED CONVENTIONAL DISTILLATION COLUMNS. (FIG.8)

公开(公告)号：MY126887A

公开(公告)日：2006-10-31

申请号：MYPI20015305

申请日：2001-11-20

Applicant: BASF AG

Inventor： DR HOLGER BORCHERT ,  DR FRANK STEIN ,  DR GERD KAIBEL ,  ALEXANDER WECK ,  DR ROLF-HARTMUTH FISCHER ,  DR RALF-THOMAS RAHN ,  DR STEPHAN SCHLITTER ,  DR MARKUS R0XD6SCH

IPC: C07D307/08 ,  C07B61/00 ,  C07D307/33

Abstract: THE PRESENT INVENTION RELATES TO A PROCESS FOR THE GAS-PHASE HYDROGENATION OF C?-DICARBOXYLIC ACIDS AND/OR THEIR DERIVATIVES OVER A CATALYST BASED ON COPPER OXIDE TO GIVE SUBSTITUTED OR UNSUBSTITUTED Y-BUTYROLACTONE AND/OR TETRAHYDROFURAN, WHICH A FIRST REACTION ZONE IN WHICH THE C?-DICARBOXYLIC ACID AND /OR ITS DERIVATIVES IS/ARE REACTED TO GIVE A MIXTURE COMPRISING A SUBSTITUTED OR UNSUBSTITUTED TUTED Y-BUTROLACTONE AS MAIN PRODUCT AND A SUBSEQUENT SECOND REACTION ZONE IN WHICH THE SUBSTITUTED OR UNSUBSTITUTED Y-BUTYROLACTONE PRESENT IN THE MIXTURE FROM THE FIRST HYDROGENATION STEP IS REACTED AT A TEMPERATURE LOWER THAN THE TEMPERATURE IN THE FIRST HYDROGENATION STEP TO GIVE SUBSTITUTED OR UNSUBSTITUTED TETRAHYDROFURAN.

公开(公告)号：MY126773A

公开(公告)日：2006-10-31

申请号：MYPI20005773

申请日：2000-12-08

Applicant: BASF AG

Inventor： DR HANS-JOSEF STERZEL ,  DR GERD KAIBEL ,  JOSEF GUTH ,  DR HOLGER FRIEDRICH ,  KIRSTEN BURKART ,  DR ELKE HOFFMANN

IPC: C07C29/70 ,  B01D1/28 ,  C07C29/80 ,  C07C31/30

Abstract: ALKALI METAL METHOXIDES ARE PREPARED FROM AQUEOUS ALKALI METAL HYDROXIDE, WHICH MAY HAVE BEEN ADMIXED WITH METHANOL , AND METHANOL IN A REACTION COLUMN (4) HAVING AT LEAST 5, PREFERABLY FROM 15 TO 30, THERETICAL PLATES BETWEEN THE FEED POINT FOR THE AQUEOUS ALKALI METAL HYDROXIDE AND THE FEED POINT FOR THE METHANOL (8). THE GASEOUS METHANOL/WATER MIXTURE FORMED IN THE REACTION IS FRACTIONATED IN A RECTIFICATION COLUMN (12).IN ONE VARIANT OF THE INVENTION , THE TRAYS CHOSEN FOR THE REACTION COLUMN (4) CONFIGURED AS A BUBBLE CAP TRAY OR SIEVE TRAY A COLUMN ARE TRAYS IN WHICH NOT MORE THAN 5%, PREFERABLY? 1%, OF THE LIQUID RAINS THROUGH THE RESPECTIVE TRAYS . IN ANOTHER VARIANT OF THE PROCESS OF THE PRESENT INVENTION , THE DOUBLE-WALL REACTION COLUMN (4),(24) HAS A TEMPERATURE IN THE DOUBLE WALL WHICH IS FROM 3 TO 10?C ABOVE THE INTERNAL TEMPERATURE IN THE COLUMN AND IS PROVIDED WITH RANDOM OR ORDERED PACKING , WHERE THE AVERAGE RATIO OF LIQUID FLOW TO VAPOR FLOW IS NOT EXCEEDED BY MORE THAN 15% PREFERABLY NOT BY MORE THAN 3% IN ALL SUBREGIONS OF THE COLUMN CROSS SECTION WHICH CORRESPOND TO MORE THAN 2% OF THE TOTAL COLUMN CROSS SECTION.FIG.1