Aromatics transalkylation to ethylbenzene and xylenes

    公开(公告)号:US20050215839A1

    公开(公告)日:2005-09-29

    申请号:US11137291

    申请日:2005-05-25

    IPC分类号: C07C5/22 C07C5/27 C07C6/12

    摘要: The use of transalkylation catalysts to react heavy aromatic compounds of carbon number nine (and heavier carbon numbers) with benzene to form carbon number eight aromatics is disclosed. The catalyst system preserves ethyl-group species on the heavier aromatics that are otherwise de-ethylated over most gas-phase transalkylation catalysts to form undesired ethane gas with benzene or toluene. The catalyst system also promotes methyl-group species transalkylation at selected conditions. Thus, by using the transalkylation system, a greater yield of para-xylene or other carbon number eight aromatics may be achieved overall within an integrated aromatics complex.

    Underwater alpha-numeric communication system
    12.
    发明授权
    Underwater alpha-numeric communication system 失效
    水下字母数字通信系统

    公开(公告)号:US5592156A

    公开(公告)日:1997-01-07

    申请号:US539618

    申请日:1995-10-05

    申请人: Robert James

    发明人: Robert James

    IPC分类号: H04B13/02 H04B11/00

    CPC分类号: H04B13/02

    摘要: A bi-directional underwater communication system provides a submerged operator the ability to communicate with a surface operator. Provides two transceivers both containing keypads and displays capable of transmitting and receiving alpha-numeric data. The underwater transceiver is connected to a floating antenna assembly via a small cable.

    摘要翻译: 双向水下通信系统为浸没式操作员提供与地面操作者通信的能力。 提供两个收发器,其中包含能够发送和接收字母数字数据的键盘和显示器。 水下收发器通过小电缆连接到浮动天线组件。

    Flame failure devices
    13.
    发明授权
    Flame failure devices 失效
    火焰故障装置

    公开(公告)号:US4832070A

    公开(公告)日:1989-05-23

    申请号:US151840

    申请日:1988-02-03

    IPC分类号: F16K31/68 F23N5/06

    摘要: The invention provides a flame failure device in which the reservoir exposed to the flame is charged with air and is communicated via a capillary tube to displace a membrane and hold the main valve in an open position, and the valve is closed by a spring when pressure falls as a result of the flame being extinguished. The system is re-charged via a one-way valve when pressure in the system falls below ambient pressure.

    Synchro/resolver shaft angle converter apparatus
    14.
    发明授权
    Synchro/resolver shaft angle converter apparatus 失效
    同步/旋转变压器轴角转换装置

    公开(公告)号:US4703307A

    公开(公告)日:1987-10-27

    申请号:US826403

    申请日:1986-02-05

    IPC分类号: G06J1/00 H03M1/64

    CPC分类号: G06J1/00

    摘要: Apparatus is disclosed which is controlled via computer interface logic for converting digital signals corresponding to predetermined synchro/resolver shaft angles into analog signals for stimulus purposes, and for converting the analog signals into digital words for measurement purposes. External synchro/resolver shaft angle signals may be converted into digital words for like purposes. The apparatus has a plurality of converter channels, each of which is controlled by the computer interface logic for operation independent of the other channels. The apparatus so configured is particularly adaptable for providing stimuli and measurements which are useful in test systems applications.

    摘要翻译: 公开了通过计算机接口逻辑控制的装置,用于将对应于预定同步/解析器轴角度的数字信号转换为用于刺激目的的模拟信号,并且用于将模拟信号转换为数字字以用于测量目的。 外部同步/分解器轴角度信号可以转换为数字字,用于相同目的。 该装置具有多个转换器通道,每个转换器通道由计算机接口逻辑控制,用于独立于其他通道的操作。 如此构造的装置特别适用于提供在测试系统应用中有用的刺激和测量。

    System for providing an integrated display of instantaneous information
relative to aircraft attitude, heading, altitude, and horizontal
situation
    15.
    发明授权
    System for providing an integrated display of instantaneous information relative to aircraft attitude, heading, altitude, and horizontal situation 失效
    用于提供与飞机姿态,航向,高度和水平情况相关的瞬时信息的综合显示的系统

    公开(公告)号:US4283705A

    公开(公告)日:1981-08-11

    申请号:US43942

    申请日:1979-05-30

    IPC分类号: G01C23/00 G01D7/04 G08G5/00

    CPC分类号: G01D7/04 G01C23/00

    摘要: A display device particularly suited for providing the pilot of an aircraft with combined inflight attitude, heading, altitude, and horizontal situation information previously available only by using two or three devices providing separate displays. The preferred embodiment of this invention combines a commonly used and commercially available flight director-type device for providing a display in combination with a miniature aircraft supported for angular displacement from a vertical orientation to indicate heading error, or heading offset, and an extended course deviation indicator bar which projects into juxtaposition with the miniature aircraft for providing a true picture of the aircraft's horizontal situation relative to a selected VOR, ILS, or MLS course.

    摘要翻译: 一种显示装置,特别适合于提供飞行员的飞行员,其具有组合的机动车姿态,航向,高度和水平情况信息,其仅通过使用提供分开的显示器的两个或三个装置才可用。 本发明的优选实施例结合了常用和市售的飞行导向器型装置,用于提供与从垂直方向角位移支持的微型飞行器相结合的显示器,以指示航向误差或航向偏移,以及延长的航向偏差 指示杆与微型飞机并列,以提供飞机相对于选定的VOR,ILS或MLS课程的水平情况的真实图片。

    METHOD AND APPARATUS FOR MEASUREMENT OF MAGNETIC PERMEABILITY OF A MATERIAL
    17.
    发明申请
    METHOD AND APPARATUS FOR MEASUREMENT OF MAGNETIC PERMEABILITY OF A MATERIAL 有权
    测量材料磁性渗透性的方法和装置

    公开(公告)号:US20100079137A1

    公开(公告)日:2010-04-01

    申请号:US12449655

    申请日:2008-02-27

    IPC分类号: G01N27/72

    CPC分类号: B24B1/005 G01N27/76

    摘要: A system for determining magnetic permeability of a material. Two electrical inductors formed as primary and secondary concentric coils share a common magnetic core space. A first AC voltage applied to the primary coil creates a magnetic flux in the core proportional to the magnetic permeability of the material. The magnetic flux induces an AC voltage in the secondary coil indicative of the apparent magnetic permeability of the sample. The apparent permeability is corrected for conductivity by imposing a second AC voltage and resistor in series across first and second electrodes disposed in the material. When the material is a magnetorheological fluid, the magnetic permeability is proportional to the concentration of magnetic particles in the sample and can be back-calculated from the amplitude of the secondary voltage signal.

    摘要翻译: 一种用于确定材料的磁导率的系统。 形成为主要和次级同心线圈的两个电感器共享共同的磁芯空间。 施加到初级线圈的第一AC电压在芯中产生与该材料的磁导率成比例的磁通量。 磁通量引起次级线圈中的交流电压,表示样品的表观磁导率。 通过在设置在材料中的第一和第二电极上串联施加第二交流电压和电阻器来校正电导率的表观磁导率。 当材料是磁流变流体时,磁导率与样品中磁性颗粒的浓度成比例,可以从次级电​​压信号的幅度反向计算。

    METHOD AND APPARATUS FOR MEASUREMENT OF MAGNETIC PERMEABILITY OF A MATERIAL
    18.
    发明申请
    METHOD AND APPARATUS FOR MEASUREMENT OF MAGNETIC PERMEABILITY OF A MATERIAL 有权
    测量材料磁性渗透性的方法和装置

    公开(公告)号:US20080214092A1

    公开(公告)日:2008-09-04

    申请号:US11681258

    申请日:2007-03-02

    IPC分类号: B24B1/00 G01N27/74

    CPC分类号: B24B1/005 G01N27/76

    摘要: A system for determining the magnetic permeability of a material is provided. Two electrical inductors formed as primary and secondary concentric coils share a common magnetic core space. An AC voltage applied to the primary coil creates a magnetic flux in the core proportional to the magnetic permeability of a sample of the material positioned within the core space. The magnetic flux induces an AC voltage in the secondary coil indicative of the sample magnetic permeability. When the material is a magnetorheological fluid, the magnetic permeability is proportional to the concentration of magnetic particles in the sample and can be back-calculated from the amplitude of the secondary voltage signal. Sensitivity and resolution can be increased by using two identical sets of coils wherein a reference material forms a core for the primary set and the MR fluid sample forms a core for the secondary set.

    摘要翻译: 提供了用于确定材料的磁导率的系统。 形成为主要和次级同心线圈的两个电感器共享共同的磁芯空间。 施加到初级线圈的交流电压产生磁芯中的磁通量,该磁通量与定位在磁芯空间内的材料的样品的磁导率成比例。 磁通量在次级线圈中产生表示样品磁导率的AC电压。 当材料是磁流变流体时,磁导率与样品中磁性颗粒的浓度成比例,可以从次级电​​压信号的幅度反向计算。 可以通过使用两组相同的线圈来提高灵敏度和分辨率,其中参考材料形成用于初级组的芯,并且MR流体样品形成用于次级组的芯。

    Method for improved efficiency and data alignment in data communications protocol
    19.
    发明申请
    Method for improved efficiency and data alignment in data communications protocol 审中-公开
    数据通信协议中提高效率和数据对齐的方法

    公开(公告)号:US20080126609A1

    公开(公告)日:2008-05-29

    申请号:US11521711

    申请日:2006-09-14

    IPC分类号: G06F3/00

    摘要: A method for improving the speed and efficiency of communicating between two components on a printed circuit board is shown. According to the method, the data in the data frames being transmitted between the components is aligned with the bus width of the receiving component so that less processing time will be expended aligning the transmitted in data for the receiving component. In some embodiments, the data is aligned by placing the checksum in a position in the data frame to be transmitted before the data in the data frame.

    摘要翻译: 示出了用于提高印刷电路板上的两个部件之间的连通速度和效率的方法。 根据该方法,在组件之间发送的数据帧中的数据与接收组件的总线宽度对齐,从而将较少的处理时间用于对准用于接收组件的数据传输。 在一些实施例中,通过将校验和放置在要在数据帧中的数据之前发送的数据帧中的位置来对齐数据。

    Process and apparatus for ethylbenzene production and transalkylation to xylene

    公开(公告)号:US20050074376A1

    公开(公告)日:2005-04-07

    申请号:US10997830

    申请日:2004-11-24

    申请人: Robert James

    发明人: Robert James

    IPC分类号: C07C6/12 B01J8/00

    摘要: The use of two transalkylation catalysts to react aromatic compounds of carbon number nine (and heavier carbon numbers) with benzene to form carbon number eight aromatics is disclosed. The two catalyst system preserves ethyl-group species on the heavier aromatics that would otherwise de-ethylate over most gas-phase transalkylation catalysts to form undesired ethane gas with benzene or toluene. Thus, by using a transalkylation step to save ethylbenzene, a greater yield of para-xylene or other carbon number eight aromatics may be achieved within an integrated complex. An apparatus and process for the two transalkylation catalyst system is disclosed with a liquid-phase unit and a gas-phase unit.