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    • 8. 发明授权
    • Method for producing ethylene and propylene
    • 生产乙烯和丙烯的方法
    • US06307117B1
    • 2001-10-23
    • US09508043
    • 2000-03-03
    • Takashi TsunodaMitsuhiro Sekiguchi
    • Takashi TsunodaMitsuhiro Sekiguchi
    • C07C406
    • C07C4/06B01J29/061B01J29/40B01J29/44C07C2529/04C07C2529/40C10G2400/20Y02P20/52C07C11/06C07C11/04
    • Disclosed is a method for producing ethylene and propylene from a hydrocarbon feedstock by catalytic conversion, which comprises contacting, in a reactor, a hydrocarbon feedstock comprising 20% by weight or more, based on the weight of the hydrocarbon feedstock, of at least one C4-C12 olefin with a zeolite-containing catalyst, wherein the zeolite in the zeolite-containing catalyst satisfies the following requirements: (1) the zeolite is an intermediate pore size zeolite having a pore size of from 5 to 6.5 Å, (2) the zeolite contains substantially no proton, (3) the zeolite contains at least one metal selected from the group consisting of metals belonging to Group IB of the Periodic Table, and (4) the zeolite has an SiO2/Al2O3 molar ratio of from 200 to 5,000, to effect a catalytic conversion reaction of the hydrocarbon feedstock, thereby obtaining a reaction mixture containing ethylene and propylene; and separating the ethylene and propylene from the reaction mixture. In the method of the present invention, the zeolite-containing catalyst has high resistance to deactivation and, thus, ethylene and propylene can be stably produced in high yield for a prolonged period of time.
    • 公开了一种通过催化转化从烃原料生产乙烯和丙烯的方法,其包括在反应器中使基于烃原料重量的20重量%或更多的烃原料与至少一个C 4 -C 12烯烃与含沸石的催化剂,其中,含沸石的催化剂中的沸石满足以下要求:(1)沸石是孔径为5〜6.5的中等孔径的沸石,(2) 沸石基本上不含质子,(3)沸石含有选自元素周期表第IB族金属中的至少一种金属,(4)沸石的SiO 2 / Al 2 O 3摩尔比为200-5,000 ,进行烃原料的催化转化反应,得到含有乙烯和丙烯的反应混合物; 并从反应混合物中分离乙烯和丙烯。 在本发明的方法中,含沸石的催化剂具有高的失活性,因此可以长期稳定地高产率地制备乙烯和丙烯。
    • 9. 发明授权
    • Display control apparatus using PLL
    • 使用PLL的显示控制装置
    • US5945983A
    • 1999-08-31
    • US555174
    • 1995-11-08
    • Hideo KannoTakashi Tsunoda
    • Hideo KannoTakashi Tsunoda
    • H04N5/66G09G3/20G09G5/00G09G5/18
    • G09G5/008G09G3/2059
    • A display control apparatus for forming dot clocks for display corresponding to a video signal from a first sync signal and executing a display control is constructed by a comparator for comparing the first sync signal and frequency division signals, a clock forming circuit for forming the dot clocks for display on the basis of a result of the comparator, a memory in which frequency division parameters of the dot clocks for display have been stored, a frequency division signal forming circuit for forming the frequency division signals from the frequency division parameters and the dot clocks for display, a counter for counting the first sync signal, and a changing circuit for changing the frequency division parameters stored in the memory in the case where a count value of the counter reaches a predetermined value.
    • 用于形成与来自第一同步信号的视频信号相对应的用于显示的点时钟并执行显示控制的显示控制装置由用于比较第一同步信号和分频信号的比较器构成,用于形成点时钟的时钟形成电路 用于基于比较器的结果进行显示的存储器,其中存储有用于显示的点时钟的分频参数的存储器,用于从分频参数形成分频信号的分频信号形成电路和点时钟 用于显示的计数器,用于计数第一同步信号的计数器,以及在计数器的计数值达到预定值的情况下,改变存储在存储器中的分频参数的改变电路。