公开(公告)号：MY136283A

公开(公告)日：2008-09-30

申请号：MYPI20033890

申请日：2003-10-13

Applicant: BASF AG

Inventor： PASTRE J XD RG DR ,  EXNER KAI MICHAEL DR ,  STUER WOLFRAM DR ,  XDFLER ELKE GEI ,  MACHHAMMER OTTO DR

IPC: C07C51/09 ,  C07C51/54 ,  C07C51/56

Abstract: PROCESS FOR THE JOINT PREPARATION OF @(I) FORMIC ACID (III);(II) A CARBOXYLIC ACID HAVING AT LEAST TWO CARBON ATOMS (II) AND/OR DERIVATIVES THEREOF; AND (III) A CARBOXYLIC ANHYDRIDE (VII),WHICH COMPRISES (A) TRANSESTERIFYING A FORMIC ESTER (I) WITH A CARBOXYLIC ACID HAVING AT LEAST TWO CARBON ATOMS (II) TO FORM FORMIC ACID (III) AND THE CORRESPONDING CARBOXYLIC ESTER (IV);(B) CARBONYLATING AT LEAST PART OF THE CARBOXYLIC ESTER (IV) FORMED IN STEP (A) TO FORM THE CORRESPONDING CARBOXYLIC ANHYDRIDE (V); AND(C) TRANSANHYDRIDING AT LEAST PART OF THE CARBOXYLIC ANHYDRIDE (V) FORMED IN STEP (B) WITH A CARBOXYLIC ACID (VI) TO FORM A CARBOXYLIC ANHYDRIDE (VII) AND THE CARBOXYLIC ACID (II).

公开(公告)号：MY129066A

公开(公告)日：2007-03-30

申请号：MYPI20022821

申请日：2002-07-26

Applicant: BASF AG

Inventor： HIBST HARTMUT PROF DR ,  NOE RALF DR ,  EXNER KAI MICHAEL DR ,  DUDA MARK DR

IPC: C07D307/60 ,  C07B61/00

Abstract: A PROCESS FOR PREPARING MALEIC ANHYDRIDE BY HETEROGENEOUSLY CATALYZED GAS-PHASE OXIDATION OF AN N-BUTENE-CONTAINING HYDROCARBON STREAM BY MEANS OF OXYGEN-CONTANING GASES IN A SHELL-AND-TUBE REACTOR HAVING TWO SUCCESSIVE REACTION ZONES, WHERE THE FIRST, FEED-SIDE REACTION ZONE CONTAINS AT LEAST ONE CATALYST WHICH IS SUITABLE FOR THE OXYDEHYDROGENATION OF N-BUTENES TO 1, 3-BUTADIENE AND THE SECOND, PRODUCT-SIDE REACTION ZONE CONTAINS AT LEAST ONE CATALYST WHICH IS SUITABLE FOR THE OXIDATION OF1, 3-BUTADIENE TO MALEIC ANHYDRIDE, IS CARRIED OUT USING A SHELL-AND-TUBE REACTOR WHICH HAS AT LEAST ONE HEAT TRANSFER MEDIUM CIRCUIT IN THE REGION OF THE FIRST, FEED-SIDE REACTION ZONE AND AT LEAST ONE FURTHER HEAT TRANSFER MEDIUM CIRCUIT IN THE REGION OF THE SECOND, PRODUCT-SIDE REACTION ZONE.