摘要:
To provide a catalyst composition which prevents the activity from deteriorating due to grain growth of Rh and/or Pt and exhibits satisfactory catalytic performance over a long time, the catalyst composition is prepared so that it comprises a perovskite-type composite oxide represented by the following general formula (1):
A 1-x A' x B 1-(y+z) B' y N z O 3 (1)
wherein A represents at least one element selected from alkaline earth metals; A' represents at least one element selected from rare earth elements; B represents at least one element selected from Ti, Zr, and Hf; B' represents at least one element selected from transition elements (excluding rare earth elements, Ti, Zr, Hf, Rh, and Pt) and Al; N represents at least one element selected from Rh and Pt; x represents an atomic ratio satisfying the following condition: 0 ≤ x ≤ 0.4; y represents an atomic ratio satisfying the following condition: 0 ≤ y
摘要翻译:为了提供一种催化剂组合物,其防止由于Rh和/或Pt的晶粒生长而导致的活性劣化并且长时间显示出令人满意的催化性能,所以制备催化剂组合物,使其包含由以下化合物表示的钙钛矿型复合氧化物 一般公式(1):€ƒ€ƒ€ƒ€ƒ€ƒ€ƒA1-x A'x B 1-(y + z)B'y N z O 3€ƒ€ƒ€€ ƒ€ƒ(1)其中A表示选自碱土金属的至少一种元素; A'表示选自稀土元素中的至少一种元素; B表示选自Ti,Zr和Hf中的至少一种元素; B'表示选自过渡元素(不包括稀土元素,Ti,Zr,Hf,Rh和Pt)和Al中的至少一种元素; N表示选自Rh和Pt中的至少一种元素; x表示满足以下条件的原子比:0‰¤x‰¤0.4; y表示满足以下条件的原子比:0‰¤y <0.5; z表示满足以下条件的原子比:0
摘要:
Metal-containing composition and use thereof in catalytic reactions, which metal-containing composition is obtainable by contacting a metal hydroxy salt with a solution comprising one or more pH-dependent anions selected from the group consisting of pH-dependent boron-containing anions, vanadium-containing anions, tungsten-containing anions, molybdenum-containing anions, iron-containing anions, niobium-containing anions, tantalum-containing anions, aluminium-containing anions, and gallium-containing anions.
摘要:
Catalysts comprising a mixed metal oxide Mo a V b M c Nb d X e O f wherein M is Te or Sb are synthesized by a hydrothermal method. In another embodiment, the catalysts have a specific XRD pattern. These catalysts are obtainable by hydrothermal synthesis followed by treatment with acid or H 2 O 2 . The catalysts are utilized to produce unsaturated carboxylic acids by the vapor phase oxidation of an alkane, or a mixture of an alkane and an alkene, in the presence thereof; or to produce unsaturated nitriles by the vapor phase oxidation of an alkane, or a mixture of an alkane and an alkene, and ammonia in the presence thereof.
摘要翻译:通过水热法合成包含M为Te或Sb的混合金属氧化物MoaVbMcNbdXeOf的催化剂。 在另一个实施方案中,催化剂具有特定的XRD图案。 这些催化剂可以通过水热合成,然后用酸或H 2 O 2处理。 催化剂用于在其存在下通过烷烃或烷烃和烯烃的混合物的气相氧化产生不饱和羧酸; 或通过烷烃或烷烃和烯烃的混合物以及氨的气相氧化产生不饱和腈。
摘要:
One object of the present invention is to provide a method for producing a molybdenum-bismuth-iron containing composite oxide fluid bed catalyst, which is useful for an ammoxidation and which produces a target ammoxidation product at high yield and an excellent reproducibility. In order to achieve this object, the present invention provides a method for producing a molybdenum-bismuth-iron containing composite oxide fluid bed catalyst which is used for ammoxidation of organic compounds, comprising the step in that a slurry, which contains the raw materials containing specific elements, is subjected to a concentration treatment at 50-120°C.
摘要:
A process for the manufacture of acrylic acid comprising reacting propylene and oxygen (preferably in the form of air) in a reaction zone having a catalyst characterized by the following formula: AaBbCcCadFeeBifMo12=Ox, where A = one or more of Li, Na, K, Rb and Cs; B = one or more of Mg, Sr, Mn, Ni, Co and Zn; C = one or more of Ce, Cr, Al, Sb, P, Ge, Sn, Cu, V and W and; a = 0.01 to 1.0; b and e = 1.0 - 10; c = 0 to 5.0, preferably 0.05 to 5.0, especially preferred being 0.05 to 4.0, and x is a number determined by the valence requirements of the other elements present; at an elevated temperature to produce acrylic acid and acrolein.
摘要:
A catalyst composition for the vapor phase ammoxidation of alkanes and olefins of the general empirical formulae:
VSb a M b O x
VSb a M b M' b' O x
VSb a M b Q c O x
VSb a M b Q c Q' c' O x
wherein M and M' are at least one element selected from magnesium, aluminum, zirconium, silicon, hafnium, titanium and niobium, M and M' being different, Q and Q' are at least one element selected from rhenium, tungsten, molybdenum, tantalum, manganese, phosphorus, cerium, tin, boron, scandium, bismuth, gallium, indium, iron, chromium, lanthanum, yttrium, zinc, cobalt, nickel, cadmium, copper, strontium, barium, calcium, silver, potassium, sodium and cesium, Q and Q' being different, a is 0.5 to 20, b is 2 to 50, b' is 0 to 50, c is 0 to 10, c' is 0 to 10 and x is determined by the valence requirements of the elements present. The catalyst composition containing isolated vanadium and antimony species in an inert matrix is prepared by incorporating respective compounds of vanadium and antimony into the oxide of at least one or more M and adding by co-precipitation or impregnation one or more optional Q in the relative atomic proportions indicated by the subscripts.
摘要:
A process for preparing acrylonitrile comprises ammoxidising propylene in the presence of a complex oxide catalyst having the empirical formula:
A a B b C c D d Fe e Bi f Mo 12 O x
where A is Cs, K or mixtures thereof B is one or more of Mg, Mn, Ni, Co, Ag, Pb, Re, Cd and Zn or mixtures thereof C is one or more of Ce, Cr, P, Ge and mixtures thereof D is Ca and optionally one of Sr, Ba or mixtures thereof and a = 0.01 to 1.0 b and e = 1.0 to 10 c, d and f = 0.1 to 5.0 and x is a number determined by the valence requirements of the other elements present.
摘要:
A carrier which is characterized by carrying on at least a part of an inert carrier surface an oxide of formula (1):
X a Y b Z c O d (1)
Wherein X is one or more element selected from alkaline earth metals; Y is one or more element selected from silicon, aluminum, titanium and zirconium; Z is one or more element selected from Group IA elements and Group IIIB elements of the periodic table, boron, iron, bismuth, cobalt, nickel and manganese; and 0 is oxygen; a, b, c and d denote the atomic ratios of X, Y, Z and O, respectively, such that when a = 1, 0
摘要:
A catalyst of formula (1):Mn α E 1 β E 2 γ O x wherein E 1 is at least one element selected from P, As, Sb, B, S, Se, Te, F, Cl, Br, I, Nb, Ta, W, Re and Cu; E 2 is at least one element selected from Cr, Fe, Co, Ni, Ag, Au, Zn, Tl, Sn, Pb, Bi, Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Y, La, Ce, Nd and Sm; α = 1, β = 0.01-10, γ = 0-5, and x is a numerical value determined by the oxidation states of the elements other than oxygen.