| 简介 |
一种催化剂组成物，其包含一种由催化性氧化物所构成的复合物，该催化性氧化物包含：铷、铈、铬、铁、铋、钼、以及至少一种镍或镍与钴、任择地包含镁以及任择地包含一种磷、锑、碲、钠、锂、钾、铯、铊、硼、钨、钙，其中此等元素之相对比例是以下列通式来表示：; RbaCebCrcMgdAeFefBigYhMo12Ox; 其中A是镍(Ni)或镍(Ni)与钴(Co)之组合，; Y是至少一种磷(P)、锑(Sb)、碲(Te)、锂(Li)、钠(Na)、钾(K)、铯(Cs)、铊(Tl)、硼(B)、锗(Ge)、钨(W)、钙(Ca)、锌(Zn)、一种稀土元素、或其混合物，; a是大约0.01至大约1，; b是大约0.01至大约3，; c是大约0.01至大约2，; d是大约0至大约7，; e是大约0.01至大约10，; f是大约0.01至大约4，; g是大约0.05至大约4，; h是0至大约3; x是一个视其他存在元素之价数需求来决定之数目，其中b+c大於g，且其中该催化剂是实质不包含锰、一种贵重金属或钒。此催化剂可供用於将丙烯、异丁烯、或其混合物个别地予以氨氧化成丙烯晴、甲基丙烯晴及其混合物。 A catalyst comprising a complex of catalytic oxides comprising rubidium, cerium, chromium, iron, bismuth, molybdenum, and at least one of nickel or nickel and cobalt, optionally magnesium, and optionally one of phosphorus, antimony, tellurium, sodium, lithium, potassium, cesium, thallium, boron, germanium, tungsten calcium, wherein the relative ratios of these elements are represented by the following general formula：Rba Ceb Crc Mgd Ae Fef Big Yh Mo12 Ox wherein A is Ni or the combination of Ni and Co, Y is at least one of P, Sb, Te, Li, Na, K, Cs, Tl, B, Ge, W, Ca, Zn, a rare earth element, or mixtures thereof, a is about 0.01 to about 1, b is about 0.01 to about 3, c is about 0.01 to about 2, d is 0 to about 7, e is about 0.01 to about 10, f is about 0.01 to about 4, g is about 0.05 to about 4, h is 0 to about 3, x is a number determined by the valence requirements of the other elements present, wherein "b"+"c" is greater than "g" and wherein the catalyst is substantially free of manganese, a noble metal and vanadium. The catalyst is useful in processes for the ammoxidation of an olefin selected from the group consisting of propylene, isobutylene or mixtures thereof, to acrylonitrile, methacrylonitrile and mixtures thereof, respectively. |
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