• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 26
  • 4
  • 4
  • 3
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 48
  • 9
  • 8
  • 7
  • 6
  • 6
  • 6
  • 6
  • 5
  • 5
  • 5
  • 4
  • 4
  • 3
  • 3
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The hydrogenolysis of organic compounds

Connor, Ralph, January 1932 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1932. / Typescript. With this is bound 5 articles by Connor, et. al., reprinted from Journal of the American Chemical Society, 1930-1932. Includes bibliographical references.
2

Hydrogenolysis of substituted cyclopropyl methyl acetates

Ogbuawa, Chuck Obiora. January 2006 (has links)
Thesis (M.S.)--University of Delaware, 2006. / Principal faculty advisor: Joseph M. Fox, Dept. of Chemistry & Biochemistry. Includes bibliographical references.
3

Applications of enantiopure templated azomethine ylids to β-hydroxy-α-amino acid synthesis

Robertson, Sarah Marie January 2000 (has links)
No description available.
4

The investigation of alkylmagnesium hydrides

Wall, Harry Thomas 08 1900 (has links)
No description available.
5

Equilibrium limitations and selectivity on conversion of glycerol to propylene glycol

Rivera-Ramos, Lizanette. January 2006 (has links)
Thesis (M.S.)--University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 22, 2009) Includes bibliographical references.
6

Hydrogenolysis of benzyl ethers with soluble catalysts.

Li, Chun-ming, 1948- January 1972 (has links)
No description available.
7

Hydrogenolysis of benzyl ethers with soluble catalysts.

Li, Chun-ming, 1948- January 1972 (has links)
No description available.
8

The hydrogenolysis of glycerol to lower alcohols.

Van Ryneveld, Esti. January 2010 (has links)
Much work has been done towards the hydrogenolysis of glycerol to 1,2-PDO and 1,3-PDO using various heterogeneous systems including Rh, Ru, Pt, PtRu, copper systems and Raney Ni in batch systems. However, routes to lower alcohols, such as 1-propanol and ethanol have been less discussed. From an industry point of view, the production of lower alcohols, such as propanol and ethanol, is very interesting. Different ruthenium, palladium and platinum catalysts were employed to study the effect of the support on the catalytic performance in batch mode. These catalysts were evaluated for their production of lower alcohols, especially 1-propanol using concentrated glycerol solutions. Among the other solid acids tested in combination with Ru/C, Amberlyst DT gave the most promising results from a 1-PO point of view, achieving a 34.9 mol% glycerol conversion with a selectivity of 38 mol% selectivity to 1-propanol. Despite the low glycerol conversion (1.3 mol%), Pd/C gave a promising 1-PO selectivity (> 85 mol%). The use of supported Ni catalysts, an inexpensive system, towards the chemical transformation of glycerol to lower alcohols, has appeared less frequently in the literature. The activity of Ni supported catalysts on silica and alumina was studied for the transformation of glycerol to lower alcohols, primarily 1-propanol and ethanol in a fixed bed continuous flow reactor. Several characterisation techniques were performed on the fresh and used catalyst, such as BET, XRD, TPD, TPR, TGA and electron microscopy. The objective was also to continue the development of a more detailed mechanistic understanding of the formation of lower alcohols from glycerol. In an endeavour to understand the process better, the role of proposed intermediates, 1,2-propanediol, 1,3- propanediol, ethylene glycol and ethanol was investigated, as well as the influence of the hydrogen partial pressure. Under the reaction conditions employed, it was clear that the hydrogenolysis of C-C and C-O bonds of glycerol took place to a lesser extent when compared to dehydrogenation and dehydration which are seen as the dominating initial steps. Ethanol was produced in high selectivities with 1,2-propanediol as feed and 1-propanol was the main product obtained when 1,3-propanediol was used as feed. / Thesis (Ph.D.)-University of KwaZulu-Natal, Westville, 2010.
9

Catalytic conversion of glycerol and sugar alcohols to value-added products

Dasari, Mohanprasad A., January 2006 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (July 18, 2008) Includes bibliographical references.
10

Pressure Dependence of Hydrogenolysis of Propane over Supported Ruthenium

Tsjeng, Po 03 1900 (has links)
<p> The hydrogenolysis of propane over 0.5 weight percent ruthenium supported on (see symbol in text)-alumina in a continuous stirred-tank catalytic reactor was studied at various pressures and temperatures. </p> <p> The reaction orders with respect to propane and hydrogen and the activation energies were examined at various pressures. A mechanism was proposed and a Hougen-Watson type of rate expression was obtained from the analysis of the proposed mechanism. </p> <p> The product distributions were studied at various pressures and temperatures. A reaction network involving reversible adsorption-desorption of the hydrocarbons and irreversible rupture of the carbon-carbon bonds in the surface species was applied to the experimental data. </p> <p> The proposed mechanism was consistent with the data for kinetics and selectivity. </p> / Thesis / Master of Engineering (MEngr)

Page generated in 0.0373 seconds