公开(公告)号：MY112478A

公开(公告)日：2001-06-30

申请号：MYPI19952645

申请日：1995-09-07

Applicant: BASF AG

Inventor： ULRIKE WEGERLE ,  ULRICH HAMMON ,  WILHELM RUPPEL ,  ANDREAS TENTEN

IPC: B01J23/28 ,  B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  C07B61/00 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055

Abstract: A PROCESS FOR THE CATALYTIC GAS-PHASE OXIDATION OF ACROLEIN TO ACRYLIC ACID IN A MULTIPLE CONTACT TUBE FIXED-BED REACTOR THROUGH WHOSE SPACE SURROUNDING THE CONTACT TUBES ONLY ONE HEAT-EXCHANGE MEDIUM CIRCUIT IS PASSED, AT ELEVATED TEMPERATURE ON CATALYTICALLY ACTIVE MULTIMETAL OXIDES WITH AN ACROLEIN CONVERSION FOR A SINGLE PASS OF > 95 MOLAND AN ACRYLIC ACID FORMATION SELECTIV-ITY OF > 90 MOL , WHICH COMPRISES FIRSTLY PASSING THE HEAT-EXCHANGE MEDIUM THROUGH THE MULTIPLE CONTACT TUBE FIXED-BED REACTOR LONGITUDINALLY, CONSIDERED O.VER THE REACTION CONTAINER AS A WHOLE, TO THE CONTACT TUBES IN COCURRENT TO THE REACTION-GAS MIXTURE AND SECONDLY SUPERPOSING A TRANSVERSE FLOW WITHIN THE REACTION CONTAINER BY MEANS OF AN ARRANGEMENT OF SUCCESSIVE BAFFLES ALONG THE CONTACT TUBES WHICH LEAVES PASSAGE CROSS SECTIONS FREE, SO AS TO GIVE A MEANDROUS FLOW OF THE HEAT-EXCHANGE MEDIUM, SEEN) IN LONGITUDINAL SECTION THROUGH THE CONTACT TUBE BUNDLE, AND SETTING THE FLOW RATE OF THE CIRCULATED HEAT-EXCHANGE MEDIUM SO THAT ITS TEMPERATURE RISES BY FROM 2 TO L0?C BETWEEN THE POINT OF ENTRY INTO THE REACTOR AND THE POINT OF EXIT OUT OF THE REACTOR.