公开(公告)号：MY145398A

公开(公告)日：2012-02-15

申请号：MYPI20084679

申请日：2007-05-18

Applicant: BASF SE

Inventor： THOMAS MACKEWITZ ,  FRANK ROSOWSKI ,  ANDREAS TENTEN

IPC: C07D307/89

Abstract: PRODUCTION OF PHTHALIC ANHYDRIDE BY GAS PHASE OXIDATION OF O-XYLOL 5 THE INVENTION RELATES TO A METHOD FOR PRODUCING PHTHALIC ANHYDRIDE BY CATALYTIC GAS PHASE OXIDATION OF O-XYLOL. ACCORDING TO SAID METHOD, A GASEOUS MIXTURE OF O-XYLOL AND AN OXYGEN-CONTAINING GAS IS GUIDED THROUGH AT LEAST TWO REACTION ZONES IN A MAIN REACTOR, THE TEMPERATURE OF SAID REACTION ZONES BEING ADJUSTABLE INDEPENDENTLY OF EACH OTHER, AND IS REACTED TO GIVE A GASEOUS 10 INTERMEDIATE REACTION PRODUCT WHICH CONTAINS UNREACTED O-XYLOL, PHTHALIC ANHYDRIDE REACTION PRODUCTS WITH A LOWER OXIDATION STATE AND PHTHALIC ANHYDRIDE, AND THE INTERMEDIATE REACTION PRODUCT IS INTRODUCED INTO A SECONDARY REACTOR. THE TEMPERATURE IN THE REACTION ZONES IN THE PRIMARY REACTOR IS CONTROLLED IN SUCH A MANNER THAT THE CONCENTRATION OF THE UNREACTED 1 5 O-XYLOL IN THE INTERMEDIATE REACTION PRODUCT IS AT LEAST 0.5BY WEIGHT. THE METHOD ACCORDING TO THE INVENTION ALLOWS AN INCREASE IN TOTAL YIELD OF PHTHALIC ANHYDRIDE WITHOUT ANY OR WITHOUT SUBSTANTIAL DECREASE IN PRODUCT QUALITY.

公开(公告)号：MY145445A

公开(公告)日：2012-02-15

申请号：MYPI20084680

申请日：2007-05-18

Applicant: BASF SE

Inventor： THOMAS MACKEWITZ ,  FRANK ROSOWSKI ,  ANDREAS TENTEN

IPC: C07D307/89

Abstract: PRODUCTION OF PHTHALIC ANHYDRIDE BY GAS PHASE OXIDATION OF O-XYLOL IN A PRIMARY AND A SECONDARY REACTOR 5 THE INVENTION RELATES TO A METHOD FOR PRODUCING PHTHALIC ANHYDRIDE BY CATALYTIC GAS PHASE OXIDATION OF O-XYLOL. ACCORDING TO SAID METHOD, A GASEOUS MIXTURE OF O-XYLOL AND AN OXYGEN-CONTAINING GAS IS REACTED IN A PRIMARY REACTOR TO GIVE A GASEOUS INTERMEDIATE REACTION PRODUCT WHICH CONTAINS UNREACTED O-XYLOL, PHTHALIC ANHYDRIDE REACTION PRODUCTS WITH A LOWER OXIDATION 10 STATE AND PHTHALIC ANHYDRIDE, THE REACTION HEAT PRODUCED IN THE PRIMARY REACTOR BEING AT LEAST PARTIALLY CARRIED OFF BY INDIRECT COOLING WITH A HEAT EXCHANGE MEDIUM, AND INTRODUCING THE INTERMEDIATE REACTION PRODUCT TO A SECONDARY REACTOR. THE CONCENTRATION OF THE UNREACTED O-XYLOL IN THE INTERMEDIATE REACTION PRODUCT IS AT LEAST 1BY WEIGHT, AND THE SUM OF THE 15 CONCENTRATIONS OF PHTHALIC ANHYDRIDE OF THE LOWER OXIDATION STATE IN THE INTERMEDIATE REACTION PRODUCT IS AT LEAST 0.5BY WEIGHT. THE METHOD ACCORDING TO THE INVENTION ALLOWS AN INCREASE IN TOTAL YIELD OF PHTHALIC ANHYDRIDE WITHOUT ANY OR WITHOUT SUBSTANTIAL DECREASE IN PRODUCT QUALITY.