Back to results
US 7,094,727 B2Granted
Heteropolyacid catalyst and method for producing the same
AssigneeLG Chem, Ltd.
InventorsGyo-hyun Hwang, Won-ho Lee, Min-ho Kil
Life of this patent
Estimating the term…
Abstract
Provided is a novel heteropolyacid catalyst useful for partial oxidation of methacrolein (MACR) to methacrylic acid (MAA), as represented by the following formula 1: PMoaAbBcCdDeEfOg (1) wherein A, B, C, D, E, a, b, c, d, e, f, and g are as defined in the specification. Provided is also a method for producing the heteropolyacid catalyst. The heteropolyacid catalyst produced by the method exhibits excellent catalyst activity in terms of conversion rate, selectivity, and yield.
Claims7
A heteropolyacid catalyst represented by the following formula 1:
- PMoaAbBcCdDeEfOg (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.
12 more elements
Dependencies are inferred from the claim text.