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719
Low severity coal liquefaction promoted by cyclic olefins
Low severity coal liquefaction allows for solubilization of coal with reduced gas make. These lower severity conditions may result in some selective bond rupture. Promotion of coal solubilization through hydrogen transfer using highly active and effective hydrogen donors is the objective of this study. The highly effective donors being tested are cyclic olefins. Representative cyclic olefins are isotetralin, which is 1,4,5,8-tetrahydronaphthalene, and 1,4,5,8,9,10-hexahydroanthracene. These compounds are hydroaromatics without aromatic rings and have been shown to be highly effective donors. The objective of the work performed in this study during this quarter was to evaluate reaction parameters for low severity liquefaction reactions using the cyclic olefin, hexahydroanthracene, and the aromatic, anthracene. These model compounds were reacted under a variety of conditions to evaluate their reactivity without coal. The reactions were performed under both thermal and catalytic conditions. Finely divided catalysts from different molybdenum precursors were used to determine their activity in promoting hydrogenation and hydrogen transfer at low severity conditions. The catalysts used were Molyvan L, sulfurized oxymolybdenum dithiocarbamate, molybdenum naphthenate, and Molyvan 822, organo molybdenum dithiocarbamate.
Date:
July 27, 1992
Creator:
Curtis, C. W.
Object Type:
Report
System:
The UNT Digital Library
Theoretical explanation of present mirror experiments and linear stability of larger scaled machines
A quasilinear model for the evolution of the 2XIIB mirror experiment is presented and shown to reproduce the time evolution of the experiment. From quasilinear theory it follows that the energy lifetime is the Spitzer electron drag time for T/sub e/ approximately less than 0.1T/sub i/. By computing the stability boundary of the DCLC mode, with warm plasma stabilization, the electron temperature is predicted as a function of radial scale length. In addition, the effect of finite length corrections to the Alfven cyclotron mode is assessed.
Date:
July 27, 1976
Creator:
Berk, H. L.; Baldwin, D. E.; Cutler, T. A.; Lodestro, L. L.; Maron, N.; Pearlstein, L. D. et al.
Object Type:
Article
System:
The UNT Digital Library
Phase Diagram and Thermodynamic Properties of the Yttrium-Zinc System
Technical report. From Abstract : "Thermal, metallographic, and vapor pressure data were obtained to establish the phase boundaries and the standard free energy, enthalpy, and entropy of formation for the compounds in the yttrium-zinc system."
Date:
July 27, 1962
Creator:
Chiotti, P. & Mason, J. T.
Object Type:
Report
System:
The UNT Digital Library
The Preparation and Properties of Distilled Yttrium
From abstract: "Distillation procedures used for purifying yttrium metal, producing metal containing less than 150 ppm oxygen and lower concentrations of most of the other common impurities, are discussed. Some of the physical and mechanical properties of the distilled yttrium indicate: (1) a melting point of 1510°C, (2) a solid state transformation at 1459°C obtained from high temperature resistivity data, (3) a Rockwell H hardness of 60 and (4) improved rolling and swagging characteristics."
Date:
July 27, 1962
Creator:
Habermann, C. E. & Daane, A. H. (Adrian Hill), 1919-
Object Type:
Report
System:
The UNT Digital Library
Texas Business Review, Volume 14, Issue 6, July 1940
Newsletter of the University of Texas Bureau of Business Research outlining statistics and research related to business in Texas.
Date:
July 27, 1940
Creator:
University of Texas. Bureau of Business Research.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Comfort and the Like.
Patent for a loosely woven material that covers household furnishings so it can be easily cleaned and then reattached.
Date:
July 27, 1920
Creator:
McNatt, Lucie R.
Object Type:
Patent
System:
The Portal to Texas History
Crate.
Patent for an improvement in crates that contains fruit in perfect condition without any bruising or mashing and can be stacked on top of each other.
Date:
July 27, 1920
Creator:
Woodruff, William Douglas
Object Type:
Patent
System:
The Portal to Texas History
Valve Control for Radiator Drain-Cocks.
Patent for "controlling devices for operating the valves of radiator drain cocks and for cleaning the drain cock pipe, and the object is to provide a convenient device by which the drain cock valve can be easily and quickly closed or opened and by which the drain pipe can be cleaned and kept cleaned." (lines 10-16)
Date:
July 27, 1920
Creator:
Brandt, Herman
Object Type:
Patent
System:
The Portal to Texas History
Wood Rod Elevator
Patent for an improvement to rod lifters that prevents the rotation of the rods as well as locking jaws into their gripper positions. The locking and gripping is made more efficient and can release rods quickly.
Date:
July 27, 1920
Creator:
Davis, George F.
Object Type:
Patent
System:
The Portal to Texas History
Well Cable-Pump
Patent for an improved pump that can be used in connection with deep wells and provides improved construction that alleviates the necessity of having a long line of extra pipe and the troubling pump rod.
Date:
July 27, 1920
Creator:
Fender, Joe N.
Object Type:
Patent
System:
The Portal to Texas History
Hydrocarbon-Burner.
Patent for improvements in hydrocarbon burners that is inexpensive and can take refined oil or heavy crude oil and make it useable as fuel.
Date:
July 27, 1920
Creator:
St. Wrba, Joseph J.
Object Type:
Patent
System:
The Portal to Texas History
Speed-Recorder.
Patent for recording instruments to use in connection with automobiles to record the speed of conveyance during the period of travel.
Date:
July 27, 1920
Creator:
Bowdish, Harry A.
Object Type:
Patent
System:
The Portal to Texas History
Paper-Cutting Machine.
Patent for an improved paper cutting machine that can achieve more precise cuts for labels, paper boxes, and cartons, and also has a clamping mechanism to hold the paper in place.
Date:
July 27, 1920
Creator:
Downie, James H.
Object Type:
Patent
System:
The Portal to Texas History
Igniting Device.
Patent for improvements in electrical ignitors that can be put over a gas burner and operated by the pressure of the gas flowing from the burner, which can ignite the gas.
Date:
July 27, 1920
Creator:
Shuford, Carl H.
Object Type:
Patent
System:
The Portal to Texas History
Cotton-Chopper Attachment for Cultivators.
Patent for improvements in cotton chopping attachments for cultivators that is relatively inexpensive that is highly useful in chopping and plowing cotton plan.
Date:
July 27, 1920
Creator:
Martin, William A. & Roebuck, Mathew P.
Object Type:
Patent
System:
The Portal to Texas History
Rotary-Drill Head.
Patent for a drill apparatus that improves the head gears and driving mechanisms that makes for an efficient driving of the apparatus and allows for free vertical movement.
Date:
July 27, 1920
Creator:
Johnston, Horace G.
Object Type:
Patent
System:
The Portal to Texas History
Analysis of Broadened X-ray Diffraction Peaks
This report is a manual describing the methods developed by Stokes (1) and Warren and Averbach (2) (3) for the determination of the effects of cold work by x-ray diffraction methods. Only the method of mathematical analysis is presented while the method of obtaining the necessary x-ray diffraction patterns is not mentioned. This manual will be used for an experimental study of irradiation damage to uranium.
Date:
July 27, 1955
Creator:
Merckx, K. R.
Object Type:
Report
System:
The UNT Digital Library
The Suppression of Chlorine Volatilization in Nitric Acid Distillation
Description of Invention: Chloride-induced corrosion is a serious problem in the Purex acid recovery operation and in the evaporative concentration of process streams and waste solutions. In the case of Purex acid recovery, it has been shown that trace chloride will volatilize with the nitric acid and reflux in the acid fractionator, thus causing especially severe corrosion at that point. These traces of chloride may enter the process form several sources, i.e., as an impurity in the technical grade chemicals used in making up the various aqueous process streams, by hydrolysis or radiation decomposition of carbon tetrachloride (a promising diluent for tributyl phosphate), or by incomplete removal of the hydrochloric acid employed in some flowsheets for effecting the dissolution of certain difficulty soluble nuclear reactor fuel elements.
Date:
July 27, 1956
Creator:
Moore, R. L.
Object Type:
Report
System:
The UNT Digital Library
Crystallite Sizes of PuO_2 Powders
In connection with studies of the chemical reactivity of PuO_2 to hydrofluorination, samples were examined by X-ray diffraction for crystallite size and perfection. The PuO_2 was formed by thermal decomposition of the oralate. The reactivity of this oxide, as well as that of other solid oxides is affected by the conditions of preparation. Besides the obvious influence of surface, including lattice strain and other structural irregularities in the particles. Each particle is composed of a number of crystallites. The extent of crystallites size and perfection will be indicated by the width of a diffracted X-ray beam. Since separation of these two caus4es would require a detailed analysis, the observed broadening was interpreted on the assumption of crystallite size effects alone. However, the variable factor in preparation method was temperature, and it is to be expected that crystallite growth with annealing will occur in part at the expense of energy stored in nonequilibrium states of the crystal, i.e., imperfections. The objectives of this study were to establish a convenient method for determination of PuO_2 crystallite size and to obtain estimates of the crystallite sizes of seven given samples.
Date:
July 27, 1956
Creator:
Pallmer, P. G.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Studies of the Adsorption of Uranium in a Resin-In-Pulp System
Data were obtained in non-flowing and flowing (continuous) batch adsorption systems to serve as a guide to the operating conditions that should be used in a resin-in-pulp adsorption system for the recovery of uranium from ores.
Date:
July 27, 1953
Creator:
Abrams, Charles S. & Kaufman, David
Object Type:
Report
System:
The UNT Digital Library
Texas Office of Public Insurance Counsel Requests for Legislative Appropriations: 2020 and 2021
Report submitted by Texas Office of Public Insurance Counsel to the Texas 86th regular legislature requesting appropriations to fund programming and activities. It includes an overview of the institution's goals, summaries of appropriations requests for fiscal years 2020 and 2021, and supporting documentation.
Date:
July 27, 2018
Creator:
Texas. Office of Public Insurance Counsel.
Object Type:
Book
System:
The Portal to Texas History
Multiplication Measurements with Highly Enriched Uranium Metal Slabs
A series of neutron multiplication measurements with arrays of 1 by 8 by 10 in. slabs of 93.4% U235-enirched uranium metal have been made to provide data from which safety criteria for the storage of these fissile units can be established. Each slab contained 22.9 kg of U235. A maximum of 125 unites was assembled. The arrays studied were cubic lattices of the units and were usually parallelepipedal in shape.
Date:
July 27, 1959
Creator:
Mihalczo, J. T. & Lynn, J. J.
Object Type:
Report
System:
The UNT Digital Library
FSA News - Lone Star State Edition: July 2023
Monthly newsletter from the Texas State Office of the USDA Farm Service Agency (FSA) discussing news and activities of the FSA, funding opportunities, and other information related to farming and agriculture in Texas.
Date:
July 27, 2023
Creator:
United States. Farm Service Agency. Texas State Office.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History