Zeolite octane additive
    7.
    发明授权
    Zeolite octane additive 失效
    沸石辛烷值添加剂

    公开(公告)号:US5302567A

    公开(公告)日:1994-04-12

    申请号:US787170

    申请日:1991-11-04

    摘要: When a zeolite additive composition of a medium-pore zeolite with a Constraint Index from about 1 to about 12 and a silica to alumina mole ratio greater than about 12 is added to a conventional cracking catalyst dispersed in an inorganic matrix, the octane will be improved, but there will be a yield loss in the amount of gasoline produced. An improvement in that catalyst system is obtained by partially exchanging the medium-pore zeolite additive with cations from one or more elements of Group IA, Group IIA or Group IIIA of the Periodic Table. The octane number of the gasoline-range product of an FCC process is still improved while the amount of the gasoline yield loss typically observed for such octane-enhancing additives is reduced.

    摘要翻译: 当分散在无机基质中的常规裂化催化剂中加入约1至约12约束指数约为约12的中孔沸石和二氧化硅与氧化铝的摩尔比大于约12的沸石添加剂组合物时,辛烷值将提高 ,但产生的汽油量会产生损失。 通过将中孔沸石添加剂与元素周期表中IA族,IIA族或IIIA族的一种或多种元素的阳离子部分交换而获得催化剂体系的改进。 FCC工艺的汽油范围产物的辛烷值仍然提高,而对于这种辛烷值增强添加剂通常观察到的汽油产率损失量降低。

    Underwater IR communication system
    9.
    发明授权
    Underwater IR communication system 失效
    水下红外通信系统

    公开(公告)号:US5267070A

    公开(公告)日:1993-11-30

    申请号:US878697

    申请日:1992-05-05

    IPC分类号: H04B13/02 H04B10/00

    CPC分类号: H04B13/02

    摘要: An underwater communications system comprising first and second communications modules which transmit and receive data utilizing infrared radiation. Each module has a transmitter/receiver which converts each received data byte to RS-232 formatted data for transmission to a computer. Each communication module also includes a timer for providing a forty kilohertz pulsed signal to modulation circuitry which passes the pulsed signal through the modulation circuitry when a logic zero is supplied to the modulation circuitry and which inhibits the pulsed signal when a logic one is supplied to the circuitry. That portion of the pulsed signal which passes through the modulation circuitry is provided to a light emitting diode which transmits a pulsed burst of infrared radiation to an infrared light detecting unit within the second communications module. The infrared light detecting unit then provides a logic zero at its output when its receives a pulsed burst of infrared radiation for time period of approximately six hundred microseconds and a logic one when the unit fails to detect a pulsed burst of infrared radiation for a time period of six hundred microseconds.

    摘要翻译: 一种水下通信系统,包括利用红外辐射发射和接收数据的第一和第二通信模块。 每个模块都有一个发送器/接收器,用于将每个接收的数据字节转换为RS-232格式的数据,以传输到计算机。 每个通信模块还包括一个定时器,用于向调制电路提供四十kHz的脉冲信号,该调制电路当逻辑零被提供给调制电路时将脉冲信号通过调制电路,并且当逻辑1被提供给 电路。 通过调制电路的脉冲信号的该部分被提供给发射二极管,该发光二极管将脉冲的红外辐射脉冲发射到第二通信模块内的红外光检测单元。 然后,当红外光检测单元在其接收到大约六百微秒的时间周期的脉冲脉冲串的红外辐射时,在其输出端提供逻辑零,当该单元在一段时间内不能检测到脉冲的红外辐射时,逻辑1 六百微秒。