摘要:
Disclosed is a catalyst composition which does not contain antimony or molybdenum for the vapor phase ammoxidation of alkanes of the general empirical formula: VWaBibMcOx wherein M is one or more elements selected from sodium, cesium, magnesium, calcium, barium, boron, yttrium, indium, aluminum, gallium, tin, titanium, silicon, zirconium, germanium, niobium and tantalum, a is 0.2 to 10, b is 0.5 to 5, c is 0 to 10 and x is determined by the valence requirements of the elements present. The catalyst precursor is precipitated from a solution or slurry of compounds of vanadium, tungsten, bismuth and, optionally, M, then separated, dried and calcined to give a phase or combination of phases active in the ammoxidation of low-weight paraffins to the corresponding unsaturated mononitriles. Nitriles may be produced in a gas phase catalytic reaction of alkanes with ammonia and oxygen in the presence of the catalyst.
摘要:
A process for the vapor phase ammoxidation of alkanes and olefins with a catalyst of the general empirical formula: VSbaMbQcOx wherein M is at least one element selected from magnesium, aluminum, zirconium, silicon, hafnium, titanium and niobium, Q is 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, a is 0.5 to 20, b is 2 to 50, c is 0 to 10 and x is determined by the valence requirements of the elements present. The process has a co-feed of gaseous carbon dioxide with an alkane (paraffin) and/or alkene, ammonia and an oxygen-containing gas which react in the presence of the catalyst to form a nitrile and by-products.
摘要翻译:烷烃和烯烃的气相氨氧化方法,其催化剂具有以下通用经验公式:<?in-line-formula description =“In-line Formulas”end =“lead”?> VSb SUB ?O O x <<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 其中M是选自镁,铝,锆,硅,铪,钛和铌中的至少一种元素,Q是选自铼,钨,钼,钽,锰,磷,铈,锡,硼,钪中的至少一种元素 ,铋,镓,铟,铁,铬,镧,钇,锌,钴,镍,镉,铜,锶,钡,钙,银,钾,钠和铯,a为0.5〜20,b为2〜50 ,c为0至10,x由所存在的元素的化合价要求确定。 该方法具有气态二氧化碳与烷烃(石蜡)和/或烯烃,氨和含氧气体的共同进料,其在催化剂存在下反应以形成腈和副产物。
摘要:
A catalyst composition for the vapor phase ammoxidation of alkanes and olefins of the general empirical formulae: VSbaMbOx VSbaMbM′b′Ox VSbaMbQcOx VSbaMbQcQ′c′Ox 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 catalyst composition for oxidative dehydrogenation of paraffinic hydrocarbons and other compounds having at least two adjacent carbon atoms each having at least one hydrogen atom. The catalyst composition is represented by the formula AaBbSbcVdAleOx wherein A is an alkali or alkaline earth metal; B is one or more optional elements selected from zinc, cadmium, lead, nickel, cobalt, iron, chromium, bismuth, gallium, niobium, tin and neodymium; a is 0 to 0.3, b is 0 to 5, c is 0.5 to 10, d is 1, e is 3 to 10, 7≦a+b+c+d+e≦25, and x is determined by the valence requirements of the elements present. A process for the oxidative dehydrogenation of paraffins using the catalyst composition.
摘要翻译:用于链烷烃和具有至少两个相邻碳原子的其它化合物的氧化脱氢的催化剂组合物各自具有至少一个氢原子。 所述催化剂组合物由碱土金属和碱土金属代表, B是选自锌,镉,铅,镍,钴,铁,铬,铋,镓,铌,锡和钕中的一种或多种任选元素; a为0〜0.3,b为0〜5,c为0.5〜10,d为1,e为3〜10,7,= a + b + c + d + e <= 25,x由 现有要素的价格要求。 使用催化剂组合物对石蜡进行氧化脱氢的方法。