公开(公告)号：DE2626887A1

公开(公告)日：1977-12-22

申请号：DE2626887

申请日：1976-06-16

Applicant: BASF AG

Inventor： KRABETZ RICHARD DIPL CHEM DR ,  HERRMANN WALTER DIPL ING DR ,  SCHOLZ NORBERT ING GRAD ,  ENGELBACH HEINZ DIPL CHEM DR ,  ENGERT GERD-JUERGEN DIPL CHEM ,  WILLERSINN CARL-HEINZ DIPL CHE ,  DUEMBGEN GERD DIPL CHEM DR ,  THIESSEN FRITZ DIPL CHEM DR

IPC: B01J23/00 ,  B01J23/24 ,  B01J23/28 ,  B01J23/30 ,  B01J23/31 ,  B01J23/34 ,  B01J23/88 ,  B01J23/89 ,  B01J37/02 ,  C07B61/00 ,  C07C51/00 ,  C07C51/25 ,  C07C57/055 ,  C07C67/00

Abstract: Catalysts which consist of a molded carrier, the surface of which is coated with an active catalyst composition of the general formula Mo12AaBbCcDdOx, where A is V and/or W, B is Cu and/or Fe and/or Mn and/or Ni and/or Cr, C is Nb and/or Ta and/or Bi and/or Sb and/or Sn and/or Th and/or Ce and/or U, D is Li and/or Na and/or K and/or Rb and/or Cs and/or Tl and a is from 0.1 to 18, b is from 0 to 8, c is from 0 to 10, d is from 0 to 2 and x is from 36 to 135, which are particularly active and selective for the oxidation of acrolein and methacrolein with oxygen-containing gases to give acrylic acid and methacrylic acid, respectively, are obtained by first manufacturing the catalyst composition, before applying it to the carrier, from thermally easily decomposed salts of the components by mixing aqueous solutions, slurries or moist solid masses of the salts of the components, drying the mixture and calcining the dried composition at from 140 DEG to 600 DEG C., then milling it to a particle size of less than 150 mu m and thereafter applying it, as a mixture with water, as a layer from 10 to 1,500 mu m thick, to the premolded carrier, which has a rough surface.

公开(公告)号：DE2521361A1

公开(公告)日：1976-11-18

申请号：DE2521361

申请日：1975-05-14

Applicant: BASF AG

Inventor： MERZ GERHARD DIPL CHEM DR ,  KLUG HANS DIPL CHEM DR ,  GRAH LIESELOTE ING GRAD ,  HERRMANN WALTER DIPL ING DR

IPC: C09D7/00 ,  C09C1/30

公开(公告)号：DE2909671A1

公开(公告)日：1980-10-02

申请号：DE2909671

申请日：1979-03-12

Applicant: BASF AG

Inventor： KRABETZ RICHARD DIPL CHEM DR ,  HERRMANN WALTER DIPL ING DR ,  ENGELBACH HEINZ DIPL CHEM DR ,  PALM PETER ,  SOMMER KARL DIPL ING DR ,  SPAHN HEINRICH DIPL ING DR

IPC: B01J23/00 ,  B01J23/88 ,  B01J23/887 ,  B01J23/888 ,  B01J35/08 ,  B01J35/10 ,  B01J37/02 ,  C07C45/35 ,  C07C45/36 ,  C07C51/235 ,  C07C51/25 ,  C07C57/055 ,  B01J35/02 ,  C07C57/04

公开(公告)号：DE2909670A1

公开(公告)日：1980-10-02

申请号：DE2909670

申请日：1979-03-12

Applicant: BASF AG

Inventor： KRABETZ RICHARD DIPL CHEM DR ,  ENGELBACH HEINZ DIPL CHEM DR ,  PALM PETER ,  SPAHN HEINRICH DIPL ING DR ,  HERRMANN WALTER DIPL ING DR

IPC: B01J23/00 ,  B01J23/88 ,  B01J23/887 ,  B01J35/08 ,  B01J35/10 ,  B01J37/02 ,  B01J35/02

Abstract: A coated catalyst comprising (a) an inert carrier having particles of not less than 100 mu m diameter and a surface area of up to 20 m2/g and (b) a coating which contains the catalytic material and adheres firmly to the outer surface and to the edge zone, near the surface, of the carrier particles, can be prepared by applying the catalytic material as a 10-70% strength suspension in water to the agitated carrier particles, which are at below 70 DEG C., if the suspension is sprayed, at a constant rate of from 0.01 to 2.0 kg of active material/hour/liter of carrier onto the carrier particles, while at the same time uniformly passing from 0.1 to 12 m3 (S.T.P.)/hour/liter of carrier of an inert gas at from 20 DEG to 300 DEG C. over the carrier particles, under conditions such that the water only evaporates incompletely but the water content of the resulting coating is less than the maximum degree of saturation of the catalytic material.