Abstract: Mixed oxide active catalysts having the formula:A.sub.a Mo.sub.c W.sub.d B.sub.b O.sub.xwherein:A is at least one of the metals cobalt, nickel, manganese and/or lead;B is at least one of the metals iron, bismuth, chromium and/or thallium;a is the sum of the values indicating the amounts present of each of the metals A, and is a number ranging from greater than 0 to about 12;c and d are numbers each equal to or greater than 0 and ranging to 12, with the sum c+d being about 12;b is the sum of the values indicating the amounts present of each of the metals B, and is a number ranging from greater than 0 to about 1.

Abstract: Mixed oxide active catalysts having the formula:A.sub.a Mo.sub.c W.sub.d Co.sub.e B.sub.b O.sub.xwherein:A is at least one of the metals nickel, manganese and/or lead;B is at least one of the metals iron, bismuth, chromium and/or thallium;a is the sum of the values indicating the amounts present of each of the metals A, and is a number ranging from greater than or equal to 0 to about 4;c and d are numbers each equal to or greater than 0 and ranging to 12, with the sum c+d being about 12;e is a number ranging from about 8 to about 12;b is the sum of the values indicating the amounts present of each of the metals B, and is a number ranging from greater than 0 to about 1.

Abstract: An active oxidation catalyst having the formula:A.sub.a Mo.sub.c W.sub.d B.sub.b O.sub.xwherein A is at least one of the metals cobalt, nickel, manganese and/or lead; B is at least one of the metals iron, bismuth, chromium and/or thallium; a is the sum of each of the metals A and ranges from greater than zero to about 12; c and d each ranges from zero to 12, with their sum being about 12; b is the sum of each of the metals B and ranges from greater than zero to about 1.

Abstract: Nitrogen oxides, NO.sub.x, are depleted/removed from oxygen-containing gas streams comprising same, by contacting an admixture of ammonia and such gas streams, at elevated temperatures, with a catalyst which comprises a catalytically active metallic oxide deposited on a porous alumina support, said support comprising a volume of pores having diameters larger than 1000 A in excess of 25 cm.sup.3 /100 g, a volume of pores having diameters larger than 300 A in excess of 40 cm.sup.3 /100 g, a total pore volume of from about 80 cm.sup.3 /100 g to 120 cm.sup.3 /100 g, and a surface area of less than 160 m.sup.2 /g, said catalytically active metallic oxide being an oxide of a metal selected from the group consisting of vanadium, iron and cobalt, and said catalytically active metal oxide comprising from 0.5 to 20% by weight of the catalyst.

Abstract: A novel catalyst composition is disclosed which comprises a catalytically-active metal oxide component containing the oxides of cobalt, molybdenum, bismuth, and iron corresponding to the empirical formula:Co.sub.a Mo.sub.12 Fe.sub.b Bi.sub.c O.sub.xwherein:A is a value of between about 8 and about 10,B is a value of between about 0.5 and about 2,C is a value of between about 0.5 and about 2,And x equals the sum of 1.5c+1.5b+a+36 and including a crystalline phase having the empirical formula Bi.sub.2 Mo.sub.2 Fe.sub.2 O.sub.12.The catalyst composition is prepared by subjecting a conventionally prepared precursor composition to a two-step calcination, comprising two calcining procedures at a temperature of 450.degree.-500.degree. C. and an intermediate cooling to ambient temperature. The novel catalysts exhibit a high activity and selectivity in a process for preparing .alpha.,.beta.-unsaturated aldehydes by oxidizing olefins.