摘要:
Catalysts having the general formula:V.sub.1 Bi.sub.a Sb.sub.b Fe.sub.c X.sub.d Y.sub.c Z.sub.f O.sub.gwherein,X=Mo, Cu, W, Nb, Te, P, Sn, Ge, AsY=Co, Ni, Ce, La, Mn, CrZ=Alkali, alkaline earth, B, Tl and,a=0.1-10,b=0.01-20,c=0.01-5,d=0-5,e=o-3,f=0-1, and g is determined by the valance requirements of the elements present,are produced by first forming and calcining an iron-antimony oxide composition which is subsequently combined with compounds of vanadium, bismuth and other elements. The catalysts are useful in the formation of phthalonitriles from the reaction of xylenes with oxygen and ammonia at elevated temperatures.
摘要:
The present invention relates to a catalyst which comprises a vanadium oxide, a chromium oxide, a molybdenum oxide and a boron oxide supported on a silica carrier. This catalyst is suitable for use in the production of aromatic nitriles from alkyl-substituted aromatic compound by the catalytic reaction of a gas mixture containing an alkyl-substituted aromatic compound, ammonia and oxygen or a gas containing molecular oxygen over a catalyst. The present invention further relates to a process for producing the aromatic nitriles using said catalyst.
摘要:
The present invention relates to a catalyst which comprises a vanadium oxide, a chromium oxide, a molybdenum oxide and a boron oxide supported on a silica carrier. This catalyst is suitable for use in the production of aromatic nitriles from alkyl-substituted aromatic compound by the catalytic reaction of a gas mixture containing an alkyl-substituted aromatic compound, ammonia and oxygen or a gas containing molecular oxygen over a catalyst. The present invention further relates to a process for producing the aromatic nitriles using said catalyst.
摘要:
Aromatic nitriles, in particular phthalodinitriles, are prepared from an appropriately alkyl-substituted aromatic hydrocarbon by catalytic oxidation with oxygen or an oxygen-containing gas in the presence of ammonia at elevated temperatures in the vapor phase, in the presence of a catalyst which contains from 2 to 10% by weight of vanadium(V) oxide, from 1 to 10% by weight of antimony(III) oxide, from 0.02 to 2% by weight of an alkali metal oxide and alumina, by a process in which from 0.01 to 1.0% by weight of an alkaline earth metal, or of a compound of an alkaline earth metal, in particular barium or a barium compound, is added to the catalyst.