84 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Acetone"  
Results: 1 - 24 next
open access

Enzymology of acetone-butanol-isopropanol formation

Description: The long-term goal of the project is to understand the fundamental properties of biological solvent production. Our approach is to elucidate first the molecular properties of solvent-producing enzymes and then to apply to information gained from the enzymological study to investigate control mechanisms for the solvent-producing pathways and the expression of solvent-production genes. Our research primarily involves two strains of Clostridium beijerinckii: C. Beijerinckii NRRL B593 which produce… more
Date: January 1, 1992
Creator: Chen, Jiann-Shin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An assessment of the flammability and explosion potential of transuranic waste

Description: The explosion potential of transuranic (TRU) waste, destined for the Waste Isolation Pilot (WIPP), was recently examined in EEG-45. That investigation focused on the volatile organic compounds (VOCs) in the waste, particularly acetone, and concluded that an explosion due to the VOCs was unlikely. Recent evidence raises serious concerns about drums containing mixed radioactive hazardous waste bound for the WIPP. Static electricity generated by the plastic bags represents a potential ignition sou… more
Date: June 1, 1991
Creator: Silva, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bioconversion of coal-derived synthesis gas to liquid fuels. [Butyribacterium methylotrophicum]

Description: The use of coal-derived synthesis gas as an industrial feedstock for production of fuels and chemicals has become an increasingly attractive alternative to present petroleum-based chemicals production. However, one of the major limitations in developing such a process is the required removal of catalyst poisons such as hydrogen sulfide (H{sub 2}S), carbonyl sulfide (COS), and other trace contaminants from the synthesis gas. Purification steps necessary to remove these are energy intensive and a… more
Date: January 1, 1991
Creator: Jain, M. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Interface stability and defect formation during crystal growth

Description: Unidirectional solidification experiments have been carried out in organic crystals with the aim of improving our knowledge on the effects of constraints on the interface morphology and to increase our understanding of the growth of anisotropic materials. The experimental information shows that lateral constraints such as a sharp change in the cross-sectional area in the solid liquid interface path, can produce important changes in the microstructure if the interface morphology is planar, cellu… more
Date: January 8, 1991
Creator: Fabietti, L.M.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Groundwater quality assessment plan for the Metallurgical Laboratory Hazardous Waste Management Facility

Description: The Metallurgical Laboratory Hazardous Waste Management Facility (MLHWMF) will be closed under interim status regulation and permitted as a hazardous waste management facility by a Post Closure Part B Permit under 40 CFR 264. This report discusses the ground water quality assessment plan for the MLHWMF. The Metallurgical Laboratory Hazardous Waste Management Facility consists of the process sewer line leading to the Metallurgical Laboratory basin from the fence, the Metallurgical Laboratory bas… more
Date: October 1, 1990
Creator: Jerome, K. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetic resonance studies of photo-induced electron transfer reactions

Description: Fourier Transform Electron Paramagnetic Resonance (FT EPR) is useful in study of photochemical reactions: a microwave pulse rotates the electron spin magnetization vector from z (magnetic field) into xy plane ([pi]/2 pulse); the time evolution of magnetization in xy plane, the free induction decay (FID), is sampled. Fourier transform of FID gives the frequency domain EPR spectrum of the free radicals, and the method is ideal for time-resolved studies of free radicals produced by pulsed-laser ex… more
Date: November 1, 1992
Creator: van Willigen, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigations of the effects of isotopic substitution and pressure of miscibility in polymer-polymer and polymer-solvent systems

Description: Design, construction, and calibration of the polymer-solvent light scattering apparatus is complete. Preliminary results for the polystyrene-acetone system have been reported; theory has been developed also. Measurements on the polystyrene-acetone and polystyrene-methyl cyclopentane systems have been completed (abstract is included). Near tri-critical behavior is exhibited in the acetone-polystyrene system in its hypercritical point. Data on phase separation in polymer-polymer solutions by ligh… more
Date: January 1, 1992
Creator: Van Hook, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Influence of surface defects and local structure on oxygenate reaction pathways over metal oxide surfaces. Progress report, August 1992--July 1993

Description: Complete thermal desorption and photoemission studies of seven molecules (methanol, formaldehyde, formic acid, isopropanol, acetone, waste and carbon monoxide) have been completed on four different SnO{sub 2}(110) surfaces (stoichiometric, reduced, slightly-defective and highly-defective). Initial thermal desorption studies of acetic acid and propene have also been done. Results indicate that different initial surface conditions can dramatically affect: (1) probability for heterolytic dissociat… more
Date: July 1993
Creator: Cox, David F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bioconversion of coal-derived synthesis gas to liquid fuels. Final technical report, September 1, 1990--August 31, 1991

Description: The use of coal-derived synthesis gas as an industrial feedstock for production of fuels and chemicals has become an increasingly attractive alternative to present petroleum-based chemicals production. However, one of the major limitations in developing such a process is the required removal of catalyst poisons such as hydrogen sulfide (H{sub 2}S), carbonyl sulfide (COS), and other trace contaminants from the synthesis gas. Purification steps necessary to remove these are energy intensive and a… more
Date: December 31, 1991
Creator: Jain, M. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigations of the effects of isotopic substitution and pressure of miscibility in polymer-polymer and polymer-solvent systems. Technical progress report, March 1991--March 1992

Description: Design, construction, and calibration of the polymer-solvent light scattering apparatus is complete. Preliminary results for the polystyrene-acetone system have been reported; theory has been developed also. Measurements on the polystyrene-acetone and polystyrene-methyl cyclopentane systems have been completed (abstract is included). Near tri-critical behavior is exhibited in the acetone-polystyrene system in its hypercritical point. Data on phase separation in polymer-polymer solutions by ligh… more
Date: December 31, 1992
Creator: Van Hook, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetic resonance studies of photo-induced electron transfer reactions. Final report, June 1, 1990--May 31, 1993

Description: Fourier Transform Electron Paramagnetic Resonance (FT EPR) is useful in study of photochemical reactions: a microwave pulse rotates the electron spin magnetization vector from z (magnetic field) into xy plane ({pi}/2 pulse); the time evolution of magnetization in xy plane, the free induction decay (FID), is sampled. Fourier transform of FID gives the frequency domain EPR spectrum of the free radicals, and the method is ideal for time-resolved studies of free radicals produced by pulsed-laser ex… more
Date: November 1, 1992
Creator: van Willigen, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sampling and analysis of natural gas trace constituents

Description: Major and minor components of natural gas are routinely analyzed by gas chromatography (GC), using a thermal conductivity (TC). The best results obtained by these methods can report no better than 0.01 mole percent of each measured component. Even the extended method of analysis by flame ionization detector (FID) can only improve on the detection limit of hydrocarbons. The gas industry needs better information on all trace constituents of natural gas, whether native or inadvertently added durin… more
Date: September 1, 1993
Creator: Attari, A. & Chao, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Kinetic studies of electrochemical generation of Ag(II) ion and catalytic oxidation of selected organics

Description: The goal of this research is to develop a method to treat mixed hazardous wastes containing selected organic compounds and heavy metals, including actinide elements. One approach is to destroy the organic via electrochemical oxidation to carbon dioxide, then recover the metal contaminants through normally accepted procedures such as ion exchange, precipitation, etc. The authors have chosen to study the electrochemical oxidation of a simple alcohol, iso-propanol. Much of the recent work reported… more
Date: July 1, 1993
Creator: Zawodzinski, C.; Smith, W. H. & Martinez, K. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiological and chemical source terms for Solid Waste Operations Complex. Revision 1

Description: The purpose of this document is to describe the radiological and chemical source terms for the major projects of the Solid Waste Operations Complex (SWOC), including Project W-112, Project W-133 and Project W-100 (WRAP 2A). For purposes of this document, the term ``source term`` means the design basis inventory. All of the SWOC source terms involve the estimation of the radiological and chemical contents of various waste packages from different waste streams, and the inventories of these packag… more
Date: June 3, 1994
Creator: Boothe, G. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quaternary liquid/liquid equilibria of sodium sulfate, sodium sulfite and water with two solvents: Acetone and 2-propanol

Description: Aqueous solutions of sodium sulfate and sodium sulfite are produced from sodium carbonate in flue-gas scrubbers; recovery of these salts often requires multi-effect evaporators; however, a new energy-efficient unit operation called extractive crystallization has been shown to have reduced energy costs. In this process, an organic solvent is added to the aqueous salt solution to precipitate salt. Acetone is a suitable solvent for this process, better than 2-propanol. Liquid/liquid/solid equilibr… more
Date: March 1, 1994
Creator: Schiozer, A. L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Drying of Beulah-Zap lignite, pretreatment with solvents and rehydration

Description: Lignite (-100 mesh from the Argonne Premium Coal Sample Program) was dried in nitrogen under various conditions in a Cahn 121 thermobalance as part of a program on drying low rank coals for liquefaction. Samples were pretreated with solvents to determine the solvent`s ability to displace water from the pores. Toluene had little effect. Acetone and methanol, selected because of water miscibility, were examined also. The methanol accelerated the drying, apparently because it was able to diffuse i… more
Date: December 31, 1992
Creator: Vorres, K. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Recycling of acetone by distillation

Description: The Resource Conservation Recovery Act (RCRA) identifies spent acetone solvent as a listed hazardous waste. At Fernald, acetone has been spent that has been contaminated with radionuclides and therefore is identified as a mixed hazardous waste. At the time of this publication there is no available approved method of recycling or disposal of radioactively contaminated spent acetone solvent. The Consent Decree with the Ohio EPA and the Consent Agreement with the United States EPA was agreed upon … more
Date: September 1, 1992
Creator: Brennan, Deborah L.; Campbell, Barbara A.; Phelan, James E. & Harper, Mark
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhancing low severity coal liquefaction reactivity using mild chemical pretreatment. Quarterly technical progress report, December 1991--February 1992

Description: In this paper, we describe results from a study in which mild chemical pretreatment of coal has been used to enhance low severity liquefaction reactivity. We have found that ambient pretreatment of eight Argonne coals using methanol and a trace amount of hydrochloric acid improves THF-soluble conversions 24.5 wt% (maf basis) for Wyodak subbituminous coal and 28.4 wt% for Beulah-Zap lignite with an average increase of 14.9 wt% for liquefaction of the eight coals at 623 K (350{degree}C) reaction … more
Date: July 13, 1992
Creator: Shams, K. G.; Miller, R. L. & Baldwin, R. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhancing low severity coal liquefaction reactivity using mild chemical pretreatment

Description: In this paper, we describe results from a study in which mild chemical pretreatment of coal has been used to enhance low severity liquefaction reactivity. We have found that ambient pretreatment of eight Argonne coals using methanol and a trace amount of hydrochloric acid improves THF-soluble conversions 24.5 wt% (maf basis) for Wyodak subbituminous coal and 28.4 wt% for Beulah-Zap lignite with an average increase of 14.9 wt% for liquefaction of the eight coals at 623 K (350{degree}C) reaction … more
Date: July 13, 1992
Creator: Shams, K. G.; Miller, R. L. & Baldwin, R. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Steady-state analysis of the fate of volatile contaminants during In situ Vitrification

Description: A mathematical simulation has been developed to describe the transport of water, steam, and trace concentrations of volatile contaminants in soil during the application of the In Situ Vitrification (ISV) process. The ISV process creates a mass of molten soil that grows during processing. Testing has shown that the vast majority of water encountered and vaporized by the growing melt is expelled from the soil and directed to an off-gas treatment system. The simulation addresses the question: unde… more
Date: May 1, 1992
Creator: Kuhn, W. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

[Environmental investigation of ground water contamination at Wright-Patterson Air Force Base, Ohio]. Volume 5, Appendix A, Part 2, Field Investigation report

Description: This report contains information related to the sampling and chemical analysis of ground water at the Wright-Patterson Air Force Base. It is part of a field investigation of ground water contamination.
Date: March 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Super critical water oxidation on energetic materials

Description: Supercritical water oxidation (SCWO) is an innovative process for the destruction of hazardous wastes that occurs above the critical temperature and pressure of water. In this paper we present results for the oxidation of simple organic wastes and the destruction of explosives. We have tested a 50 gal./day mobile tubular reactor using both acetone and hexane as surrogate aqueous wastes in reaction with excess oxygen. For acetone, our results indicate that the fuel and oxidant can be convenientl… more
Date: April 1, 1993
Creator: Sanchez, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen