公开(公告)号：EP0024954B1

公开(公告)日：1984-06-06

申请号：EP80303104.6

申请日：1980-09-04

申请人： UBE INDUSTRIES, LTD.

发明人： Umemura, Sumio ,  Ohdan, Kyoji ,  Sakai, Fumihiko ,  Suzuki, Kenichi ,  Bando, Yasuo ,  Hogami, Toshihiko ,  Fuginaga, Masataka

IPC分类号： B01J27/18 ,  B01J23/28 ,  B01J35/10 ,  C07C51/25 ,  C07C57/04

CPC分类号： C07C51/252 ,  B01J23/002 ,  B01J23/28 ,  B01J27/199 ,  B01J2523/00 ,  C07C57/04 ,  B01J2523/13 ,  B01J2523/15 ,  B01J2523/51 ,  B01J2523/55 ,  B01J2523/68 ,  B01J2523/18 ,  B01J2523/14 ,  B01J2523/31 ,  B01J2523/17 ,  B01J2523/23

公开(公告)号：EP0024954A1

公开(公告)日：1981-03-11

申请号：EP80303104.6

申请日：1980-09-04

申请人： UBE INDUSTRIES, LTD.

发明人： Umemura, Sumio ,  Ohdan, Kyoji ,  Sakai, Fumihiko ,  Suzuki, Kenichi ,  Bando, Yasuo ,  Hogami, Toshihiko ,  Fuginaga, Masataka

IPC分类号： B01J27/18 ,  B01J23/28 ,  B01J35/10 ,  C07C51/25 ,  C07C57/04

CPC分类号： C07C51/252 ,  B01J23/002 ,  B01J23/28 ,  B01J27/199 ,  B01J2523/00 ,  C07C57/04 ,  B01J2523/13 ,  B01J2523/15 ,  B01J2523/51 ,  B01J2523/55 ,  B01J2523/68 ,  B01J2523/18 ,  B01J2523/14 ,  B01J2523/31 ,  B01J2523/17 ,  B01J2523/23

摘要： An improved catalyst suitable for use in the production of an unsaturated carboxylic acid by the catalytic vapor phase oxidation of an unsaturated aldehyde is provided. In this catalyst, a heat-resistant inorganic substance, such as alumina, silica-alumina and silicon carbide, having a particle diameter of 3 through 10mm, an apparent porosity of 35 through 60%. a water absorption of 20 through 50%, an average pore diameter of not less than 40 microns, a specific surface area of not more than 2 m 2 /g and a bulk specific gravity of 1.5 through 2.0 is used for supporting a composition containing molybdenum, phosphorous, vanadium and the alkali metals. The use of the above-mentioned carrier results in the advantages that the unsaturated carboxylic acid, such as methacrylic acid, can be selectively produced from the unsaturated aldehyde at a high yield and that the mechanical strength of the catalyst is remarkably improved.