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    • 2. 发明授权
    • Production of ethylbenzene
    • 生产乙苯
    • US5334795A
    • 1994-08-02
    • US967954
    • 1992-10-27
    • Pochen ChuMichael E. LandisQuang N. Le
    • Pochen ChuMichael E. LandisQuang N. Le
    • C07C2/66
    • C07C2/66C07C2529/70
    • Ethylbenzene is produced by the alkylation of benzene with ethylene in the presence of an alkylation catalyst having a particular structure defined by its X-ray diffraction pattern. A preferred catalyst is the zeolite MCM-22. The process is typically carried out at a temperature of 300.degree. to 1000.degree. F. but the catalyst provides sufficient activity for the reaction to be carried out at temperatures below 700.degree. F. Liquid phase operation is preferred, giving a lower yield of polyethylated products. The use of the selected catalyst also results in a reduction of the xylene impurity level to values below 500 ppm in the product.
    • 在具有由其X射线衍射图形定义的特定结构的烷基化催化剂存在下,通过苯与乙烯的烷基化生产乙苯。 优选的催化剂是沸石MCM-22。 该方法通常在300至1000°F的温度下进行,但催化剂提供足够的活性以使反应在低于700°F的温度下进行。液相操作是优选的,从而降低聚乙烯化产物的产率 。 使用所选择的催化剂还导致二甲苯杂质水平降低到产品中低于500ppm的值。
    • 3. 发明授权
    • Layered cracking catalyst and method of manufacture and use thereof
    • 层状裂化催化剂及其制造方法和用途
    • US5179054A
    • 1993-01-12
    • US735225
    • 1991-07-24
    • Paul H. SchipperHartley OwenJoseph A. HerbstGarry W. KirkerAlbin Huss, Jr.Pochen Chu
    • Paul H. SchipperHartley OwenJoseph A. HerbstGarry W. KirkerAlbin Huss, Jr.Pochen Chu
    • B01J33/00C10G11/05
    • B01J33/00C10G11/05B01J2229/12B01J2229/42C10G2300/70
    • A layered catalyst suited to the catalytic cracking of heavy feeds comprises a core and a shell. The shell comprises at least 5 wt % of at least 1 molecular sieve having openings of at least 8 angstroms. The core comprises at least 10 wt % of at least 1 molecular sieve having openings comprising a 12 or less-membered ring and has a reduced, if any, content of said molecular sieve having openings of at least 8 angstroms, relative to its concentration in the shell. Suitable molecular sieve materials having openings of at least 8 angstroms include MCM-41, VPI-5, MCM-9 and layered metal oxides, e.g., pillared clays. The required molecular sieve of the core can include zeolite Y, Ultrastable Y or intermediate pore size zeolites such as ZSM-5. The shell which may further contain a metals passivator can act as a metals sink, and can remove metals from the unit by attrition. The catalyst is preferably prepared by forming the core and then coating or encapsulating the core with a shell material. The shell may also comprise an attritable coating of an amorphous rare earth oxide, aluminum oxide and aluminum phosphate composite, which traps metals.
    • 适用于重料的催化裂化的层状催化剂包括核和壳。 该壳包含至少5重量%的具有至少8埃的开口的至少1个分子筛。 核心包含至少10重量%的具有包含12个或更少元环的开口的至少1个分子筛,并且具有至少8埃的开口的所述分子筛的含量降低(如果有的话),相对于其浓度 贝壳。 具有至少8埃开口的合适的分子筛材料包括MCM-41,VPI-5,MCM-9和层状金属氧化物,例如柱状粘土。 核心所需的分子筛可包括沸石Y,超稳定Y或中等孔径沸石如ZSM-5。 可以进一步包含金属钝化剂的壳体可以用作金属沉槽,并且可以通过磨损从单元中去除金属。 催化剂优选通过形成核心然后用壳材料涂覆或包封核心来制备。 外壳还可以包含捕获金属的无定形稀土氧化物,氧化铝和磷酸铝复合材料的可磨损涂层。