公开(公告)号：DE4431949A1

公开(公告)日：1995-03-16

申请号：DE4431949

申请日：1994-09-08

Applicant: BASF AG

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

IPC: B01J8/06 ,  B01J21/02 ,  B01J23/16 ,  B01J23/28 ,  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, with only one heat transfer medium being circulated through the space surrounding the contact tubes, at elevated temperature over catalytically active multimetal oxides at an acrolein conversion on a single pass of >/= 95 mol% and a selectivity of acrylic acid formation of >/= 90 mol%, in which the heat exchange medium on the one hand is passed longitudinally, viewed over the reaction vessel, to the contact tubes in cocurrent to the reaction gas mixture through the multiple contact tube fixed-bed reactor, and, on the other hand, has, within the reaction vessel, due to a successive arrangement, along the contact tubes, of deflecting discs which leave open cross-sections free, a superposed crossflow in such a way that, in longitudinal section through the contact tube bundle, a meander-like flow of the heat exchange medium results and the flow velocity of the circulated heat exchange medium is here set in such a way that the temperature of the heat exchange medium rises by from 2 to 10 DEG C from the inlet point to the reactor to the outlet point from the reactor.

公开(公告)号：CZ21394A3

公开(公告)日：1994-08-17

申请号：CZ21394

申请日：1994-02-01

Applicant: BASF AG

Inventor： TENTEN ANDREAS DR ,  WEIDLICH PETER DR

IPC: B01J23/00 ,  B01J23/88 ,  B01J23/887 ,  B01J23/888 ,  C01B13/14 ,  C01B13/18 ,  C01G39/00 ,  C01G53/00 ,  C07B61/00 ,  C07C51/235 ,  C07C51/25 ,  C07C57/055 ,  B01J23/85

Abstract: Multimetal oxide compositions which contain as base constituents the elements Mo, V, W, Cu and Ni in oxide form in defined molar ratios and the preparation of such multimetal oxide compositions and their use as catalysts for the gas-phase catalytic oxidation of acrolein to acrylic acid.