Patent number: 7015355
Abstract: A method for the selective production of acetic acid from a gas-phase feed of ethane, ethylene, or mixtures thereof and oxygen at elevated temperatures. The gas-phase feed is brought into contact with a catalyst, containing the elements Mo, Pd, X and Y in the gram atom ratios a:b:c: in combination with oxygen according to formula (I): MOaPdbXcYd. The symbols X and Y have the following meanings: X=one or several elements chosen from the group Cr, Mn, Nb, Ta, Ti, V, Te and W; Y=one or several elements chosen from the group B, Al, Ga, In, Pt, Zn, Cd, Bi, Ce, Co, Rh, Ir, Cu, Ag, Au, Fe, Fu, Os, K, Rb, Cs, Mg, Ca, Sr, Ba, Nb, Zr, Hf, Ni, P, Pb, Sb, Si, Sn, Ti and U: the indices a, b, c, d and x=the gram atom ration for the corresponding elements, where: a=1; b—0.0001 to 0.01; c=0.4 to 1; and d=0.005 to 1, wherein the space-time yield for the above oxidation to yield acetic acid is 470 kg/(hm3) and the selectivity of the oxidative reaction of ethane and/or ethylene to give acetic acid is, in particular, ?70 mol %.
Type:
Grant
Filed:
May 3, 2001
Date of Patent:
March 21, 2006
Assignee:
Celanese International Corporation
Inventors:
Sabine Zeyss, Uwe Dingerdissen
Publication number: 20030158440
Abstract: The invention relates to a method for the selective production of acetic acid from a gas-phase feed of ethane, ethylene, or mixtures thereof and oxygen at elevated temperatures. The gas-phase feed is brought into contact with a catalyst, containing the elements Mo, Pd, X and Y in the gram atom ratios a:b:c in combination with oxygen according to formula (I): MoaPdbXcYd. The symbols X and Y have the following meanings: X=one or several elements chosen from the group Cr, Mn, Nb, Ta, Ti, V, Te and W; Y=one or several elements chosen from the group B, Al, Ga, In, Pt, Zn, Cd, Bi, Ce, Co, Rh, Ir, Cu, Ag, Au, Fe, Ru, Os, K, Rb, Cs, Mg, Ca, Sr, Ba, Nb, Zr, Hf, Ni, P, Pb, Sb, Si, Sn, Ti and U; the indices a, b, c, d and x=the gram atom ratio for the corresponding elements, where: a=1; b=0.0001 to 0.01; c=0.4 to 1; and d=0.005 to 1. The space-time yield for the above oxidation to yield acetic acid is 470 kg/(hm3).
Type:
Application
Filed:
November 19, 2002
Publication date:
August 21, 2003
Inventors:
Sabine Zeyss, Uwe Dingerdissen