| abstract |
There is disclosed a catalytic composition represented by the formula:in which A is iron and/or chromium, B is cerium and/or magnesium and C is potassium and/or lithium; and a, b, c, d, e, f, g, h, m and n stand for the numbers of atoms for molybdenum, tungsten, bismuth, lead, antimony, A, B, C, phosphorus and oxygen elements respectively, wherein given that a + b = 12,and n is the numbers of oxygen necessary to satisfy the valences of atoms for the individual constituent elements other than oxygen, and a process for its preparation. |