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    • 3. 发明授权
    • Catalyst for cracking of paraffinic feedstocks
    • 用于裂化石蜡原料的催化剂
    • US5236880A
    • 1993-08-17
    • US846989
    • 1992-03-09
    • David M. Chapman
    • David M. Chapman
    • B01J29/46B01J29/76C10G11/05
    • C10G11/05B01J29/46B01J2229/40
    • A zeolite catalyst with improved hydrocarbon conversion comprising a crystalline aluminosilicate having a SiO.sub.2 /Al.sub.2 O.sub.3 ratio greater than 5 and preferably a MFI or MEL zeolite. The zeolite contains a Group VIIIA metal, preferably nickel, and it has been subjected to severe thermal or hydrothermal treatments under controlled conditions of temperature, time or steam partial pressure so as to effect an increase in the relative surface concentrations of Group VIIIA metal and aluminum. The catalyst can be used in a process for the conversion of paraffinic feedstocks to improve paraffin cracking activity, to increase the aromatic fraction in the C5 to C12 gasoline range products, to improve the calculated octane numbers of the C5 to C12 gasoline range product, and/or to improve the yield of the C5 to C12 gasoline range products.
    • 具有改进的烃转化率的沸石催化剂,其包含SiO 2 / Al 2 O 3比率大于5,优选MFI或MEL沸石的结晶硅铝酸盐。 沸石含有ⅦA族金属,优选镍,并且在温度,时间或蒸汽分压的受控条件下进行严格的热或水热处理,以使ⅦA族金属和铝的相对表面浓度增加 。 该催化剂可用于转化石蜡原料以提高石蜡裂化活性的方法,以增加C5至C12汽油范围产物中的芳族馏分,以改善C5至C12汽油范围产物的计算辛烷值,以及 /或提高C5至C12汽油范围产品的产量。