Abstract: A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically-bound sulfur and olefins. The olefinic naphtha stream is selectively desulfurized in a hydrodesulfurization reaction stage. The hydrodesulfurized effluent stream is separated into a light and heavy liquid fraction and the heavier fraction is further processed in a mercaptan destruction reaction stage to reduce the content of mercaptan sulfur in the final product.

Abstract: A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically bound sulfur and olefins. The olefinic naphtha stream is selectively desulfurized in a first hydrodesulfurization reaction stage. This effluent stream is then contacted with a stripping agent in a H2S removal zone, such as steam or an amine solution, to remove H2S from the effluent stream, thereby reducing the H2S partial pressure of the process stream. The process stream is then subjected to a second desulfurization reaction stage followed by a mercaptan decomposition stage to reduce the content of mercaptan sulfur in the final product stream. In a second embodiment, the effluent stream from the first hydrodesulfurization reaction stage, after being subjected to the H2S removal zone, is fed directly to the mercaptan decomposition stage where total sulfur content and mercaptan sulfur content are reduced in the final product stream.

Abstract: A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically-bound sulfur and olefins. The olefinic naphtha stream is selectively desulfurized in a first hydrodesulfurization stage. The effluent stream from this first stage is sent to a separation zone wherein a lower boiling naphtha stream and a higher boiling naphtha stream are produced. The lower boiling naphtha stream is sent through at least two more separation zones, each at a lower temperature than the preceding separation stage. The higher boiling naphtha stream, which contains most of the sulfur moieties, is passed to a second hydrodesulfurization stage wherein at least a fraction of the sulfur moieties are removed.

Abstract: A wideband multi-signal distributed exciter system for use with a phased antenna array is disclosed. The system includes a multi-signal generator that is configured with a dual direct digital frequency synthesizer (DDS) core, and is capable of generating multi-polarization signals over a given frequency range (e.g., 50 to 500 MHz) for each of N signals associated with a corresponding antenna element. An RF converter is adapted to receive multi-polarization signals from the multi-signal generator, and to convert those signals to a transmission frequency (e.g., 100 MHz to 10 GHz). A 2N signal summing module can be used to receive multi-polarization signals from each of the N dual DDS functions, and to generate an overall multi-polarization output signal that is provided for RF conversion. An identical set of multi-signal generator and RF converter modules can be associated with each element, thereby providing a high degree of modularity and interchangeability.

Abstract: A frequency selective leveling loop that performs phase and amplitude control of multiple signals within a phased array structure is disclosed. The leveling loop sensor componants are embedded into the array structure. The frequency selective leveling loop can be used with multiple signal amplifiers, and a conventional phase array jamming system can be used to radiate multiple signals simultaneously. The conversion of phase information to baseband eliminates the need for phase matched cables. The frequency selective leveling that is enabled is tolerant of multiple signals and provides the individual signal phase and amplitude feedback by utilizing analytic sampling.

Abstract: A ladies' lacrosse stick carrier in the form of a head cover has a first compartment for holding the head of the lacrosse stick and a second compartment for holding accessories. The carrier is of a generally tear-drop shape and contains the head of the lacrosse stick, with the shaft projecting out through an open throat at the rear. The carrier is provided with a carrying strap or shoulder strap. The unit ofers the participant a convenient way to stock and store all the relevant gear.

Abstract: A high frequency coax transmission line structure is configured with a stripped semi-rigid cable (no shield). The stripped cable is inserted lengthwise into a metallized grounded slot formed in a printed wiring board. The dielectric barrel of the stripped cable contacts each of the elongated side and bottom walls of the slot. An exposed portion of center conductor at each end of the cable lays tangent on a corresponding one of connection points (at each end of the slot). The structure reduces loss for long transmission line lengths, and fixes the mounting depth and routing for a consistent transition. Inductive compensation can be provided at the connections point at each end of the slot to mitigate transition discontinuity.

Abstract: Techniques that enable the transitioning of high frequency signals on a printed wiring board processed in accordance with industry standards (such as the IPC specifications) are disclosed. One embodiment provides a high frequency via structure for a printed wiring board, where the via structure includes a via pad configured in accordance with IPC standards. A printed microwave transmission line having an inductive section is connected to the via pad, wherein the inductive section has dimensions to compensate for transition discontinuity.

Abstract: A high frequency coax via structure is configured with a stripped semi-rigid cable (no shield), and an inductive compensation loop to mitigate transition discontinuity between that via structure's center conductor and the pad to which the center conductor is connected. The performance of top-to-bottom microwave transitions at high frequencies (e.g., 1 to 12 GHz) for such boards is enhanced. A non-metallized via hole embodiment that is configured with surrounding ground vias provides a greater degree of compensation for connection pads associated with greater capacitance (such as those coupled to a component).

Abstract: This invention relates to the hydroprocessing of naphtha with removal of mercaptan from product. Naphtha feedstock is hydrotreated and hydrocracked. Sulfur-containing contaminants, notably C5+ recombinant mercaptans, are then selectively removed from the hydrocracked naphtha by selective extraction or adsorption.

Abstract: A variable impedance coaxial transmission line having a center conductor of constant cross-section, an outer conductor surrounding and coaxial with the center conductor and spaced radially therefrom, and a variable dielectric constant material between the center conductor and the outer conductor. The variable dielectric constant material has a plurality of alternating elements of high dielectric material and low dielectric material arranged along the center conductor from a first end to a second end of the center conductor. The invention also includes a reduced size, high-power broadband power/divider incorporating the variable impedance coaxial transmission line.