| 摘要 |
Vinyl acetate is produced by an integrated process which comprises the steps of: a) contacting in a first reaction zone a gaseous feedstock comprising essentially ethane with a molecular oxygen-containing gas in the presence of a catalyst to produce a first product stream comprising acetic acid and ethylene; b) contacting in a second reaction zone the first gaseous product stream with a molecular oxygen-containing gas in the presence of a catalyst to produce a second product stream comprising vinyl acetate; c) separating the product stream from step (b) and recovering vinyl acetate from the product stream from step (b), wherein the catalyst in the first reaction zone is of the formula MoaPdbXcYd wherein X and Y have the following meaning: X is selected from one or more elements of the group consisting of Cr, Mn, Nb, Ta, Ti, V, Te and W; Y is selected from one or more elements of the group consisting of 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 and wherein a, b, c and are gram atom ratios and denote a = 1; b = 0.0001-0.01; preferably 0.0001-0.005 c = 0.4-1; preferably 0.5-0.8 and d = 0.005-1; preferably 0.01-0.3. |
