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Moist caustic leaching of coal

Description: A process is claimed for reducing the sulfur and ash content of coal. Particulate coal is introduced into a closed heated reaction chamber having an inert atmosphere to which is added moist caustic having a water content in the range of from about 15% by weight to about 35% by weight. The coal and moist caustic are kept at a temperature of about 300{degrees}C. Then, water is added to the coal and caustic mixture to form an aqueous slurry, which is washed with water to remove caustic from the co… more
Date: December 31, 1991
Creator: Nowak, M. A.
Partner: UNT Libraries Government Documents Department
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Oil/gas separator for installation at burning wells

Description: An oil/gas separator is disclosed that can be utilized to return the burning wells in Kuwait to production. Advantageously, a crane is used to install the separator at a safe distance from the well. The gas from the well is burned off at the site, and the oil is immediately pumped into Kuwait`s oil gathering system. Diverters inside the separator prevent the oil jet coming out of the well from reaching the top vents where the gas is burned. The oil falls back down, and is pumped from an annular… more
Date: December 31, 1991
Creator: Alonso, C. T.; Bender, D. A. & Bowman, B. R.
Partner: UNT Libraries Government Documents Department
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Pulse combustor with controllable oscillations

Description: A pulse combustor having thermally induced pulse combustion in a continuously flowing system is described. The pulse combustor is fitted with at lease one elongated ceramic body which significantly increases the heat transfer area in the combustion chamber of the combustor. The ceramic body or bodies possess sufficient mass and heat capacity to ignite the fuel-air charge once the ceramic body or bodies are heated by conventional spark plug initiated combustion so as to provide repetitive igniti… more
Date: December 31, 1991
Creator: Richards, G. A.; Morris, G. J. & Welter, M. J.
Partner: UNT Libraries Government Documents Department
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Shielded fluid stream injector for particle bed reactor

Description: A shielded fluid-stream injector assembly is provided for particle bed reactors. The assembly includes a perforated pipe injector disposed across the particle bed region of the reactor and an inverted V-shaped shield placed over the pipe, overlapping it to prevent descending particles from coming into direct contact with the pipe. The pipe and shield are fixedly secured at one end to the reactor wall and slidably secured at the other end to compensate for thermal expansion. An axially extending… more
Date: December 31, 1991
Creator: Notestein, J. E.
Partner: UNT Libraries Government Documents Department
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Method of producing amorphous thin films

Description: This invention dicloses a method for sintering particulate material (such as silica) with a laser beam to produce amorphous optical thin films on substrates.
Date: December 31, 1991
Creator: Brusasco, R. M.
Partner: UNT Libraries Government Documents Department
open access

Secure communication of static information by electronic means

Description: This invention is comprised of a method and apparatus for the secure transmission of static data from a tag to a remote reader. Each time the static data is to be transmitted to the reader, the 10 bits of static data are combined with 54 bits of binary data, which constantly change from one transmission to the next, into a 64-bit number. This number is then encrypted and transmitted to the remote reader where it is decrypted to produce the same 64 bit number that was encrypted in the tag. With … more
Date: December 31, 1991
Creator: Gritton, D. G.
Partner: UNT Libraries Government Documents Department
open access

Method for exponentiating in cryptographic systems

Description: An improved cryptographic method utilizing exponentiation is provided which has the advantage of reducing the number of multiplications required to determine the legitimacy of a message or user. The basic method comprises the steps of selecting a key from a pre-approved group of integer keys g; exponentiating the key by an integer value e, where e represents a digital signature, to generate a value g{sup e}; transmitting the value g{sup e} to a remote facility by a communications network; recei… more
Date: December 31, 1992
Creator: Brickell, E. F.; Gordon, D. M. & McCurley, K. S.
Partner: UNT Libraries Government Documents Department
open access

Filtered cathodic arc source

Description: Disclosed is a continuous, cathodic arc ion source coupled to a macro-particle filter capable of separation or elimination of macro-particles from the ion flux produced by cathodic arc discharge. The ion source employs an axial magnetic field on a cathode (target) having tapered sides to confine the arc, thereby providing high target material utilization. A bent magnetic field is used to guide the metal ions from the target to the part to be coated. The macro-particle filter consists of two str… more
Date: December 31, 1992
Creator: Falabella, S. & Sanders, D. M.
Partner: UNT Libraries Government Documents Department
open access

Fail-safe storage rack for fuel rod assemblies

Description: This report discusses a fail-safe storage rack which is provided for interim storage of spent but radioactive nuclear fuel rod assemblies. The rack consists of a checkerboard array of substantially square, elongate receiving tubes fully enclosed by a double walled container, the outer wall of which is imperforate for liquid containment and the inner wall of which is provided with perforations for admitting moderator liquid flow to the elongate receiving tubes, the liquid serving to take up wast… more
Date: December 31, 1991
Creator: Lewis, D. R.
Partner: UNT Libraries Government Documents Department
open access

Method and apparatus for determining two-phase flow in rock fracture

Description: One object of the present invention to provide an improved method and apparatus for measuring the relative permeability of a rock fracture to multiple phases in a manner which will provide even more uniform delivery of both wetting and non-wetting phases to the fracture edge. It is another object of the invention to provide an improved method and apparatus for measuring the permeability of multiple phases through a rock fracture which comprises delivering the respective phases through manifold … more
Date: December 31, 1992
Creator: Persoff, P.; Pruess, K. & Myer, L.
Partner: UNT Libraries Government Documents Department
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Method and apparatus for transporting liquid slurries

Description: An improved method and device to prevent erosion of slurry transport devices is disclosed which uses liquid injection to prevent contact by the slurry composition with the inner surface of the walls of the transport system. A non-abrasive liquid is injected into the slurry transport system and maintains intimate contact with the entire inner surface of the transport system, thereby creating a fluid barrier between the nonabrasive liquid and the inner surface of the transport system which thereb… more
Date: December 31, 1991
Creator: Berry, G. F.; Lyczkowski, R. W. & Wang, Chi-Sheng
Partner: UNT Libraries Government Documents Department
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Traveling-wave photodetector

Description: The traveling-wave photodetector of the present invention combines an absorptive optical waveguide and an electrical transmission line, in which optical absorption in the waveguide results in a photocurrent at the electrodes of the electrical transmission line. The optical waveguide and electrical transmission line of the electrically distributed traveling-wave photodetector are designed to achieve matched velocities between the light in the optical waveguide and electrical signal generated on … more
Date: December 31, 1992
Creator: Hietala, V. M. & Vawter, G. A.
Partner: UNT Libraries Government Documents Department
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System to control contamination during retrieval of buried TRU waste

Description: Between 1950 and 1970 the Department of Energy`s Rocky Flats Plant generated transuranic (TRU) contaminated waste, which was buried at the Idaho National Engineering Laboratory. This waste must now be retrieved and sent to a permanent disposal site. During retrieval the main contaminates to be controlled are compounds of plutonium and americium. Since these substances are small sized, and extremely mobile, airborne concentrations must be kept to a minimum to effectively eliminate personnel upta… more
Date: December 31, 1991
Creator: Menkhaus, D. E.; Loomis, G. G.; Feldman, E. M.; Scott, D. W.; Mullen, C. K. & Meyer, L. C.
Partner: UNT Libraries Government Documents Department
open access

X-ray tomographic image magnification process, system and apparatus therefor

Description: A computerized three-dimensional x-ray tomographic microscopy system is disclosed, comprising: (a) source means for providing a source of parallel x-ray beams; (b) staging means for staging and sequentially rotating a sample to be positioned in the path of the beams; (c) x-ray image magnifier means positioned in the path of the beams downstream from the sample; (d) detecting means for detecting the beams after being passed through and magnified by the image magnifier means; and (e) computing me… more
Date: December 31, 1991
Creator: Kinney, J. H.; Bonse, U. K.; Johnson, Q. C.; Nichols, M. C.; Saroyan, R. A.; Massey, W. N. et al.
Partner: UNT Libraries Government Documents Department
open access

Phase-sensitive flow cytometer

Description: This report describes phase-sensitive flow cytometer (FCM) which provides additional FCM capability to use the fluorescence lifetime of one or more fluorochromes bound to single cells to provide additional information regarding the cells. The resulting fluorescence emission can be resolved into individual fluorescence signals if two fluorochromes are present or can be converted directly to a decay lifetime from a single fluorochrome. The excitation light for the fluorochromes is modulated to pr… more
Date: December 31, 1992
Creator: Steinkamp, J. A.
Partner: UNT Libraries Government Documents Department
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Separation of Metals by Supported Liquid Membranes

Description: A supported liquid membrane system for the separation of a preselected chemical species within a feedstream, preferably an aqueous feedstream, includes a feed compartment containing a feed solution having at least one preselected chemical species therein, a stripping compartment containing a stripping solution therein, and a microporous polybenzimidazole membrane situated between the compartments, the microporous polybenzimidazole membrane containing an extractant mixture selective for the pres… more
Date: December 31, 1990
Creator: Takigawa, Doreen Y.
Partner: UNT Libraries Government Documents Department
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Inflatable containment diaphragm for sealing and removing stacks

Description: A diaphragm with an inflatable torus-shaped perimeter is used to seal at least one end of a stack so that debris that might be hazardous will not be released during removal of the stack. A diaphragm is inserted and inflated in the lower portion of a stack just above where the stack is to be cut such that the perimeter of the diaphragm expands and forms a seal against the interior surface of the stack.
Date: December 31, 1991
Creator: Meskanick, G. R. & Rosso, D. T.
Partner: UNT Libraries Government Documents Department
open access

Enhanced radiation resistant fiber optics

Description: A process for producing an optical fiber having enhanced radiation resitance is provided, the process including maintaining an optical fiber within a hydrogen-containing atmosphere for sufficient time to yield a hydrogen-permeated optical fiber having an elevated internal hydrogen concentration, and irradiating the hydrogen-permeated optical fiber at a time while the optical fiber has an elevated internal hydrogen concentration with a source of ionizing radiation. The radiation source is typica… more
Date: December 31, 1992
Creator: Lyons, P. B. & Looney, L. D.
Partner: UNT Libraries Government Documents Department
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Cesium iodide alloys

Description: This invention relates to a CsI composition with improved mechanical strength and outstanding multispectral infrared transmittance, for window use. The additive is a monovalent iodide, other than CsI, added in amounts sufficient to maximize fracture strength from 16 to 40 MPa, while maintaining at least 10% transparency in the 4 to 50 micrometer wavelength range. The preferred additive is AgI, although RbI or CuI can be used. 6 figs. (DLC)
Date: December 31, 1991
Creator: Kim, Hyoun-Ee & Moorhead, A. J.
Partner: UNT Libraries Government Documents Department
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High brightness electron accelerator

Description: A compact high brightness linear accelerator is provided for use, e.g., in a free electron laser. The accelerator has a first plurality of acclerating cavities having end walls with four coupling slots for accelerating electrons to high velocities in the absence of quadrupole fields. A second plurality of cavities receives the high velocity electrons for further acceleration, where each of the second cavities has end walls with two coupling slots for acceleration in the absence of dipole fields… more
Date: December 31, 1992
Creator: Sheffield, R. L.; Carlsten, B. E. & Young, L. M.
Partner: UNT Libraries Government Documents Department
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Method for Improving the Growth of Cadmium Telluride on a Gallium Arsenide Substrate

Description: A method for preparing a gallium arsenide substrate, prior to growing a layer of cadmium telluride on a support surface thereof. The preparation includes the steps of cleaning the gallium arsenide substrate and thereafter forming prepatterned shapes on the support surface of the gallium arsenide substrate. The layer of cadmium telluride then grown on the prepared substrate results in dislocation densities of approximately 1{times}10{sup 6}/cm{sup 2} or less. The prepatterned shapes on the suppo… more
Date: December 31, 1990
Creator: Reno, John L.
Partner: UNT Libraries Government Documents Department
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Apparatus for preparing a sample for mass spectrometry

Description: Disclosed is an apparatus for preparing a sample for analysis by a mass spectrometer system. The apparatus has an entry chamber and an ionization chamber separated by a skimmer. A capacitor having two space-apart electrodes followed by one or more ion-imaging lenses is disposed in the ionization chamber. The chamber is evacuated and the capacitor is charged. A valve injects a sample gas in the form of sample pulses into the entry chamber. The pulse is collimated by the skimmer and enters the io… more
Date: December 31, 1992
Creator: Villa-Aleman, E.
Partner: UNT Libraries Government Documents Department
open access

Photoconversion of organic materials into single-cell protein

Description: A process is described for converting organic materials (such as biomass wastes) into sterile, high-grade bacterial protein suitable for use an animal feed or human food supplements. In a preferred embodiment the process involves thermally gasifying the organic material into primarily carbon monoxide, hydrogen and nitrogen products, followed by photosynthetic bacterial assimilation of the gases into cell material, which can be high as 65% protein. The process is ideally suited for waste recycli… more
Date: December 31, 1991
Creator: Weaver, P. F.
Partner: UNT Libraries Government Documents Department
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