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in subjects: "Furans"

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Process and analytical studies of enhanced low severity co-processing using selective coal pretreatment

This report describes progress on research during the eleventh quarter of this contract dealing with applications of coal pretreatment techniques in coal/oil co-processing and direct hydroliquefaction. The objectives of the project are to investigate various coal pretreatment techniques and to determine the effect of these pretreatment procedures on the reactivity of the coal. Reactivity enhancement will be evaluated under both direct hydroliquefaction and co-processing conditions. Coal convers… more

Date: 1991-06~

Creator: Baldwin, R. M.; Gaur, S. & Miller, R. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Heavy recycle solvent studies in two-stage coal liquefaction. Final technical report, September 1, 1982-December 30, 1983

The objective of this program has been to study the chemistry of the components with high boiling points in a direct coal liquefaction recycle solvent and to identify those components which lead to higher overall yields and improved product stability in the initial coal dissolution step of direct coal liquefaction processes. The major conclusions are: -454 C recycle solvent is primarily aromatic hydrocarbons (73%) and contains almost no asphaltenes; +454 C recycle solvent is primarily asphalten… more

Date: January 10, 1984

Creator: Longanbach, J. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Palladium Catalyzed Coupling Reactions: Mechanism of Reductive Elimination. Progress Report, October 1, 1979-September 30, 1980. [Ethane Elimination]

The 1,1-reductive elimination of ethane from three cis-bis(phosphine)-dimethylpalladium complexes, L/sub 2/Pd(CH/sub 3/)/sub 2/ (L = PPh/sub 3/, PPh/sub 2/,CH/sub 3/ and L/sub 2/ = Ph/sub 2/PCH/sub 2/CH/sub 2/PPh/sub 2/), and three trans analogs (L = PPh/sub 3/, PPh/sub 2/CH/sub 3/ and L/sub 2/ = 2,11-bis(diphenylphosphinomethyl)benzo(c)phenanthrene (TRANSPHOS)) was carried out. The three cis complexes underwent reductive elimination in the presence of coordinating solvents (DMSO, DMF, and THF)… more

Date: September 1, 1980

Creator: Stille, J. K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Control of catalytic hydrotreating selectivity with ammonia. [Hydrodeoxygenation]

The hydrogenation of naphthalene in the presence of 0, 24, or 48 kPa of ammonia derived from propyl amine was studied during the hydrodeoxygenation (HDO) of dibenzofuran (DBF). A new sample of sulfided NiMo/Al{sub 2}O{sub 3} catalyst at 360{degrees}C, 6.9 MPa total H{sub 2} pressure in a vapor phase tubular reactor was used. As a base-line the HDO of DBF was also studied in the absence of both naphthalene and ammonia. Ammonia inhibited both the HDO of dibenzofuran and the hydrogenation of napht… more

Date: January 1, 1992

Creator: Satterfield, C. N. & Lee, C. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Catalyst dispersion and activity under conditions of temperature- staged liquefaction

The general objectives of this research are (1) to investigate the use of highly dispersed catalysts for the pretreatment of coal by mild hydrogenation, (2) to identify the active forms of the catalysts under reaction conditions and (3) to clarify the mechanisms of catalysis. The ultimate objective is to ascertain if mild catalytic hydrogenation resulting in very limited or no coal solubilization is an advantageous pretreatment for the transformation of coal into transportable fuels. The experi… more

Date: September 1, 1991

Creator: Davis, A.; Schobert, H.H.; Mitchell, G.D. & Artok, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Synthesis of block copolymers of methyl siloxane, phenyl siloxane, vinyl siloxane, etc

Synthesis of homo poly(dimethylsiloxane) PDMS, homo poly(diphenylsiloxane PDPS, and di- and tri- block copolymers of PDMS and PDPS have been carried out by anionic living polymerization, using the following reagents: hexamethylcyclotrisiloxane, HMTS and hexaphenylcyclotrisiloxane, HPTS (monomers), n-BuLi and dilithium diphenyldisilanolate, DLS (initiators), DMSO and THF (promoters) and Toluene (solvent). Lithium based catalysts are used in order to minimize siloxane rearrangement (equilibration… more

Date: June 30, 1979

Creator: Ibemesi, J.A. & Meier, D.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Interactive Chemistry of Coal-Petroleum Processing

The objective of this program is to investigate the interactive thermal and catalytic chemistry of coal and petroleum processing using model compounds and actual petroleum-coal materials. This quarter the interactive catalytic chemistry of model coal and petroleum systems was investigated using combined catalysts of molybdenum naphthenate and vanadyl acetylacetonate. This combination was performed in order to evaluate the effect of the presence of an indigenous residuum metal, vanadium, on mode… more

Date: January 1, 1989

Creator: Curtis, C. W.; Guin, J. A. & Tarrer, A. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Transition metal activation and functionalization of carbon-hydrogen bonds

We are investigating the fundamental thermodynamic and kinetic factors that influence carbon-hydrogen bond activation at homogeneous transition metal centers and the conversion of hydrocarbons into functionalized products of potential use to the chemical industry. Advances have been made in both understanding the interactions of hydrocarbons with metals and in the functionalization of hydrocarbons. We have found that RhCl(PR{sub 3}){sub 2}(CNR) complexes can catalyze the insertion of isonitrile… more

Date: June 1, 1992

Creator: Jones, W.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Simple home-made sensors for potentiometric titrations. [Nitroform CH(NO/sub 2/)/sub 3/]

A sensor for potentiometric titrations was prepared by coating a spectroscopic graphite rod with a solution of poly(vinyl chloride) and dioctyphthalate in tetrahydrofuran. The reference electrode was an Ag/AgCl single-junction electrode. The sensor was used in precipitation, acid-base, compleximetric, and redox titrations. Preparation of the coated-graphite sensor is simple and rapid. Moreover, it is quite inexpensive. A limitation is its applicability in aqueous media only, because organic sol… more

Date: April 1, 1982

Creator: Selig, W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Synthesis, chemistry, and catalytic activity of complexes of lanthanide and actinide metals in unusual oxidation states and coordination environments. Progress report, February 1, 1977--January 31, 1978

Research devoted to synthesis of new classes of lanthanide and actinide complexes is reported. Co-condensation of lanthanide metals with 1,3-butadiene (1,3-C/sub 4/H/sub 6/) or 2,3-dimethyl-1,3-butadiene (2,3-(CH/sub 3/)/sub 2/-1,3-C/sub 4/H/sub 4/) produces three types of organolanthanide complexes differentiated by their solubility in pentane, toluene and tetrahydrofuran (THF). The THF soluble species are formed in highest yield and have been most completely characterized. Elemental analysis … more

Date: October 1, 1977

Creator: Evans, W. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Magnetic relaxation--coal swelling, extraction, pore size

The grant activities during this period fall into four categories: (1) Completion of preparatory work, (2) Procedure refinement and actual preparation of whole coal, coal residue, coal extract and swelled coal samples for NMR studies, (3) Related studies of coal photolysis that employ materials from preliminary extractions and that examine the u.v.-visible and mass spectra of the extracts and (4) Continued investigations of the pulsed EPR characteristics of the whole coal samples that were prep… more

Date: January 1, 1991

Creator: Doetschman, D.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Gas Phase Radiolysis and Vacuum Ultraviolet Photolysis of Heterocyclic Organic Compounds. Progress Report, Feburary 1, 1979-February 1, 1980

The long-range objective of our research group is to gain a better understanding of the processes by which complex organic molecules react when they absorb large amounts of energy. This progress report describes the results of our recent work in three areas: diradicals derived from heterocyclic compounds; trimethylene diradicals from various sources; and ion-molecule reactions.

Date: January 1, 1980

Creator: Scala, A. A.; Nguyen, D.; Rourke, W. & Caputo, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Cyclooctatetraeneactinide(IV) bis-borohydrides

In order to take advantage of the known volatility of actinide borohydride complexes, attempts were made to prepare half-sandwich borohydrides (RCOT)M(BH/sub 4/)/sub 2/, where COT is cyclooctatetraene and M is Th or U. The borohydrides were formed as complexes with THF solvent. Spectra and chemical reactions of these compounds were investigated. (DLC)

Date: December 1, 1979

Creator: Solar, J.P.; Streitwieser, A. Jr. & Edelstein, N.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Toxic organic compounds from energy production

The US Department of Energy's Office of Health and Environmental Research (OHER) has supported work in our laboratory since 1977. The general theme of this program has been the identification of potentially toxic organic compounds associated with various combustion effluents, following the fates of these compounds in the environment, and improving the analytical methodology for making these measurements. The projects currently investigation include: an improved sampler for semi-volatile compoun… more

Date: September 20, 1991

Creator: Hites, R.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Sonic and resistivity measurements on Berea sandstone containing tetrahydrofuran hydrates: a possible analogue to natural-gas-hydrate deposits. [Tetrahydrofuran hydrates]

Deposits of natural gas hydrates exist in arctic sedimentary basins and in marine sediments on continental slopes and rises. However, the physical properties of such sediments are largely unknown. In this paper, we report laboratory sonic and resistivity measurements on Berea sandstone cores saturated with a stoichiometric mixture of tetrahydrofuran (THF) and water. We used THF as the guest species rather than methane or propane gas because THF can be mixed with water to form a solution contain… more

Date: January 1, 1983

Creator: Pearson, C.; Murphy, J.; Halleck, P.; Hermes, R. & Mathews, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Synthesis and chemistry of yttrium and lanthanide metal complexes

The objective of this research project is to determine the special features of complexes of yttrium and the lanthanide metals which will allow the design and synthesis of materials with unique chemical, physical, and catalytic properties. Past studies of yttrium and lanthanide metal alkyl and hydride complexes stabilized by cyclopentadienyl co-ligands have shown that a substantial, often singular, organometallic chemistry is available via these metals. More extensive utilization of the chemical… more

Date: September 1, 1991

Creator: Evans, W. J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Process and analytical studies of enhanced low severity co-processing using selective coal pretreatment

This report describes progress on research during the seventh quarter of this contract dealing with applications of coal pretreatment techniques in coal hydroliquefaction. The objectives of the project are to investigate various coal pretreatment techniques and to determine the effect of these pretreatment procedures on the reactivity of the coal. Reactivity enhancement will be evaluated under both direct hydroliquefaction and co-processing conditions. Coal conversion utilizing low rank coals a… more

Date: 1990-09~

Creator: Baldwin, R. M. & Miller, R. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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New regents for coal desulfurization

The primary goal of this project was development and exploration of potential new desulfurization reagents for the removal of organic sulfur'' from Illinois coals by mild chemical methods. Potential new desulfurization reagents were investigated using organic sulfur compounds of the types thought to be present in coals. Reagents included low-valent metal complexes based on nickel and on iron as well as possible Single Electron Transfer reagents. Soluble coal extracts served as second generation… more

Date: January 1, 1991

Creator: Buchanan, D.H.; Kalembasa, S.; Olson, D.; Wang, S. & Warfel, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Process and analytical studies of enhanced low severity co-processing using selective coal pretreatment

This report describes progress on research during the 12th and final quarter of this contract dealing with applications of coal pretreatment techniques in coal/oil co-processing and direct hydroliquefaction. The overall objectives of the project are to investigate various coal pretreatment techniques and to determine the effect of these pretreatment procedures on the reactivity of the coal. Reactivity enhancement will be evaluated under both direct hydroliquefaction and co-processing conditions… more

Date: 1991-09~

Creator: Baldwin, R. M.; Gaur, S. & Miller, R. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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PCDDs (polychlorinated dibenzo-p-dioxins) and PCDFs (polychlorinated dibenzofurans) in humans

Numerous instances of human exposure to polychlorinated dibenzo-p- dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) have been documented. Following the development of sufficiently specific and sensitive analytical methods during the past few years, many reports have appeared on PCDD and PCDF levels in human blood and adipose tissues. Studies have examined the PCDD and PCDF levels resulting from accidental and occupational exposures of various groups, including chemical plant workers, f… more

Date: January 1, 1990

Creator: Swanson, S.E. (Midwest Research Inst., Kansas City, MO (USA)) & Erickson, M.D. (Argonne National Lab., IL (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Coal liquefaction process streams characterization and evaluation

This is the third Quarterly Technical Progress Report under DOE Contract DE-AC22-89PC89883. Three major topics are reported: (1) Feed coals and process oils form Wilsonville Run 259 were analyzed to provide information on process performance. Run 259 was operated in the catalytic/catalytic Close-Coupled Integrated Two-Stage Liquefaction (CC-ITSL) mode with ash recycle. Feed coals were conventionally cleaned and deep cleaned coal from the Ireland Mine (Pittsburgh seam). The catalyst used in both… more

Date: July 1, 1991

Creator: Robbins, G. A.; Brandes, S. D.; Winschel, R. A. & Burke, F. P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Sediment sampling of proposed dredge sites in the confluence of the Snake and Clearwater rivers

The purpose of the study was to measure the concentration of dioxins in sediment proposed to be dredged from the Lower Granite Reservoir near Lewiston, Idaho, and compare it to concentrations found at the reference sites. The area to be dredged is immediately adjacent to and downstream from an effluent discharge pipe belonging to the Potlatch Corporation's pulp mill. Information provided by the Environmental Protection Agency (EPA) indicate the need to test for dioxins and furans in sediments o… more

Date: January 1, 1992

Creator: Pinza, M. R.; Word, J. Q.; Lefkovitz, L. F. & Mayhew, H. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Control of catalytic hydrotreating selectivity with ammonia. [Hydrodeoxygenation]

The focus of our attention has now shifted to the effect of ammonia on hydrodeoxygenation (HDO) of selected model compounds. Scouting studies with 2-phenylphenol (OPP), phenyl ether (PE), 3-ethylphenol (MEP) and dibenzofuran (DBF) indicated some inhibition of hydrogenation activity but with OPP, PE and MEP several products were formed that were not completely identified and kinetic analysis would be difficult. We therefore focused on DBF, with which we have had some experience, and we carried o… more

Date: January 1, 1991

Creator: Satterfield, C. N. & Lee, Chung M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Environmental evaluations for deepening of Richmond Harbor and Santa Fe Channels

Richland, California is an important commercial port in San Francisco Bay. The San Francisco District of the US Army Corps of Engineers (USACE) plans to increase the depth of Richmond Harbor and Santa Fe Channels to -38 feet Mean Lower Low Water (MLLW) to accommodate deep-draft commercial vessels. The total volume of dredged material is expected to be approximately 1.4 million cubic yards. The options for disposal of the dredged material are aquatic disposal and upland disposal. The purpose of … more

Date: September 1, 1990

Creator: Brown, B.; Kohn, N.P.; Crecelius, E.A.; Ward, J.A. & Bjornstad, B.N. (Battelle/Marine Sciences Lab., Sequim, WA (USA))

Item Type: Report

Partner: UNT Libraries Government Documents Department