Patent ID: 7094727

Claim:
A heteropolyacid catalyst represented by the following formula 1: PMo a A b B c C d D e E f O g (1) wherein A is V, Nb, or W; B is an alkali metal or an alkaline earth metal; C is a transition metal selected from the group consisting of Cu, Ag, Co, Ni, and Mn; D is Fe, Ce, Cr, Sn, Zn, Pd, or Rh; E is an organic acid or a N-containing compound; a is 5–12; b is 0.01–5; c is 0.01–3; d is 0.01–3; e is 0–0.3; f is 0–10; and g is a number satisfying the valence requirements of a, b, c, d, e, and f; and wherein transition metal ions are uniformly dispersed.