| 摘要 |
<p>PREPARATION OF MALEIC ANHYDRIDE FROM FOUR-CARBON HYDROCARBONS Maleic anhydride is produced by the oxidation of n-butane, n-butenes, 1,3-butadiene with molecular oxygen in the vapor phase in the presence of catalysts containing molybdenum, phosphorus, oxygen and the following components delineated in Groups I to IV: (I) bismuth, copper and a halogen selected from the group consisting of chlorine, bromine or iodine; or (II) arsenic and at least one element selected from the group consisting of Sn, rare earth metal, Zr, Rh, Mn, Re, Ru, Cu, Pb, Zn, Ti, Cr, Nb, Al, Ga and alkaline earth metal; or (III) at least one element selected from the group consisting of As, Rb, Pd, Cd, Cs, Tl and In; or (IV) rubidium, and at least one element selected from the group consisting of Sn, rare earth element, Ni, Zr, Ba, Fe, Rh, Mn, Re, Ru, Co and Cu.</p> |
