公开(公告)号：MY131137A

公开(公告)日：2007-07-31

申请号：MYPI20032156

申请日：2003-06-10

Applicant: BASF AG

Inventor： DR MICHAEL HESSE ,  ALEXANDER WECK ,  DR ROLF-HARTMUTH FISCHER ,  DR STEPHAN SCHLITTER ,  DR MARKUS R0XD6SCH ,  DR GUNNAR HEYDRICH ,  DR NILS BOTTKE ,  GUNTHER WINDECKER ,  DR HOLGER BORCHERT ,  DR MARKUS SCHUBERT

IPC: C07C29/149 ,  C07B61/00 ,  C07C31/20

Abstract: THE PRESENT INVENTION RELATES TO A PROCESS FOR PREPARING OPTIONALLY ALKYL-SUBSTITUTED 1,4-BUTANEDIOL BY TWO-STAGE CATALYTIC HYDROGENATION IN THE GAS PHASE OF C4-DICARBOXYLIC ACIDS AND/OR OF DERIVATIVES THEREOF HAVING THE FOLLOWING STEPS: A) INTRODUCING A GAS STREAM OF A C4-DICARBOXYLIC ACID OR OF A DERIVATIVE THEREOF AT FROM 200 TO 300?C AND FROM 10 TO 100 BAR INTO A FIRST REACTOR OR INTO A FIRST REACTION ZONE OF A REACTOR AND CATALYTICALLY HYDROGENATING IT IN THE GAS PHASE TO A PRODUCT WHICH CONTAINS MAINLY OPTIONALLY ALKYL-SUBSTITUTED ?-BUTYROLACTONE; B) INTRODUCING THE PRODUCT STREAM OBTAINED IN THIS WAY INTO A SECOND REACTOR OR INTO A SECOND REACTION ZONE OF A REACTOR AT A TEMPERATURE OF FROM 140?C TO 260?C AND CATALYTICALLY HYDROGENATING IT IN THE GAS PHASE TO OPTIONALLY ALKYL-SUBSTITUTED 1,4-BUTANEDIOL; STEPS A) AND B) BEING CARRIED OUT AT THE SAME PRESSURE; C) REMOVING THE DESIRED PRODUCT FROM INTERMEDIATES, BY-PRODUCTS AND ANY UNCONVERTED REACTANTS; D) OPTIONALLY RECYCLING UNCONVERTED INTERMEDIATES INTO ONE OR BOTH HYDROGENATION STAGES,SAID HYDROGENATION STAGES EACH USING A CATALYST WHICH COMPRISES 5% BY WEIGHT,PREFERABLY FROM 5 TO 95% BY WEIGHT, IN PARTICULAR FROM 20 TO 90% BY WEIGHT, OF AN OXIDIC SUPPORT, AND THE PRODUCT MIXTURE REMOVED FROM THE FIRST HYDROGENATION STAGE BEING INTRODUCED WITHOUT FURTHER PURIFICATION INTO THE SECOND HYDROGENATION STAGE.

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.