Catalyst and process for the catalytic oxidation of ethane...

C - Chemistry – Metallurgy – 07 – C

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C07C 51/215 (2006.01) B01J 23/652 (2006.01) B01J 23/68 (2006.01) C07C 51/25 (2006.01) C07C 53/08 (2006.01)

Patent

CA 2288276

A process is disclosed for selectively preparing acetic acid from a gaseous feed of ethane, ethylene or mixtures thereof, as well as oxygen, at an increased temperature, on a catalyst which contains the elements W, X, Y and Z in the gram-atom ratio a:b:c:d, associated with oxygen. In the formula W a X b Y c Z d (I), X stands for one or several elements selected from the group Pd, Pt, Ag and/or Au; Y stands for one or several elements selected from the group V. Nb, Cr, Mn, Fe, Sn, Sb, Cu, Zn, U, Ni and/or Bi; Z stands for one or several elements selected from the group Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Ti, Zr, Hf, Ru, Os, Co, Rh, Ir, B, Al, Ga, In, TI, Si, Ge, Pb, P, As and/or Te; a equals 1, b is a number higher than 0, c is a number higher than 0, and d is a number from 0 to 2. Also disclosed is said catalyst.

L'invention concerne un procédé de préparation sélective d'acide acétique à partir d'une charge gazeuse d'éthane, d'éthylène ou de leurs mélanges, ainsi que d'oxygène, à une température accrue, sur un catalyseur qui contient les éléments W, X, Y et Z dans des rapports molaires d'atomes a:b:c:d, associés avec de l'oxygène. Dans la formule WaXbYcZd (I), X désigne un ou plusieurs éléments sélectionnés dans le groupe constitué par Pd, Pt, Ag et/ou Au; Y désigne un ou plusieurs éléments sélectionnés dans le groupe constitué par V, Nb, Cr, Mn, Fe, Sn, Sb, Cu, Zn, U, Ni et/ou Bi; Z désigne un ou plusieurs éléments sélectionnés dans le groupe constitué par Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Ti, Zr, Hf, Ru, Os, Co, Rh, Ir, B, Al, Ga, In, Tl, Si, Ge, Pb, P, As et/ou Te; a vaut 1, b un nombre supérieur à 0, c un nombre supérieur à 0 et d un nombre de 0 à 2. L'invention concerne également ce catalyseur.

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