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Showing 1 to 20 of 43 for “"Catalytic hydrogenation"”.
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Catalytic hydrogenation using titanium complexes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
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Catalytic Hydrogenation and Hydrodesulfurization of Model Compounds
… dissertation describes two related studies on hydrogenation and hydrodesulfurization of heterocyclic S-containing compounds. Alkyl substituted thiophenes are promising candidates for hydrogen carriers as the dehydrogenation reactions are known to occur under mild conditions. Four types of …
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Selective catalytic hydrogenation for industrial 1-hexene purification
Linear alpha-olefins, including 1-hexene, are used mainly as co-monomers in the production of polymers. The very low tolerance of the polymerisation catalyst to highly unsaturated impurities makes removal of these impurities from the olefin feedstock crucial. In South Africa, linear alpha-olefins …
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Studies on the Catalytic Hydrogenation of Some Indole Compounds
Made available in DSpace on 2014-12-09T17:35:16Z (GMT). No. of bitstreams: 1 6507181.pdf: 3024097 bytes, checksum: 805d3db92f18b15ffcb34be009f39e62 (MD5) Previous issue date: 1965
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Magnetic Resonance Studies of Three-Phase Heterogeneous Catalytic Hydrogenation Reactions
… (NMR) methods to study heterogeneously catalysed hydrogenation reactions, under continuous reaction conditions. The techniques developed aimed to elucidate the chemical composition inside the reactor and to provide a better understanding of the interactions of the reaction species with the …
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The catalytic hydrogenation of carbon-carbon and carbon-nitrogen multiple bonds by a cobalt(I) complex
… and third-row transition metal complexes for the catalytic hydrogenation of carbon-carbon multiple bonds can be attributed to the well-defined reactivity, stability and overall high activity of such catalytic systems. The development of sustainable, more abundant and relatively less toxic late …
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High Pressure Micro-Scale Studies of Fast-Hydropyrolysis and Catalytic Hydrogenation of Biomass and Related Model Compounds
… sources. Fast pyrolysis of biomass followed by catalytic hydrodeoxygenation of bio-oil is considered a promising biomass conversion route to produce drop in hydrocarbon fuels. The H2Bioil process was proposed as an integrated high pressure fast hydropyrolysis and catalytic vapor phase …
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Green Diesel Production Via Catalytic Hydrogenation/decarboxylation Of Triglycerides And Fatty Acids Of Vegetable Oil And Brown Grease
… such a two–step processing with selective hydrogenation prior to the decarboxylation of BG improves the product selectivity. The commercial 5% Pd/C catalyst was highly active for the decarboxylation of brown grease to green diesel at 300 °C and 1.5 MPa. </p> <p>Second, a class of Pd …
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The role of bulk versus surface bound H in the catalytic hydrogenation of methyl radicals and ethylene on Ni
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1994.
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Oxidation addition of H-H bonds to iridium: developing novel active water soluble catalysts for hydrogenation of unsaturates
… <b>(8)</b>. Encouraged by these results, catalytic hydrogenation of unsaturates in water was investigated. It was found that <b>(2)</b> is active as a water soluble catalyst for hydrogenation of unsaturates. A mechanism for catalytic hydrogenation was proposed.
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Progress Toward The Total Synthesis Of The Natural Product Herbicide Ascaulitoxin Aglycone
… and formation of inseparable diastereomers. Catalytic hydrogenation and transfer catalytic hydrogenation reactions using Pd catalysts were employed for the complete deprotection of three N-CBz and two carboxybenzyl groups towards target ascaulitoxin aglycone, but were met with limited success …
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Fluorinated amino acid derivatives
… could not be reduced under the conditions of catalytic hydrogenation. Ethyl 2-chloro-4-fluoro-3-methyl-2-pentenoate was prepared from 3-fluoro-2-butanone and ethyl diethylphosphonochloroacetate, but could not be reduced. Catalytic hydrogenation of alky 4-fluoro-3-methyl-2-pentenoates gave the …
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Synthesis, characterization and modification of carbon nanomaterials
… the understanding of the mechanisms involved in catalytic growth of carbon nanotubes (CNT) and related processes, such as the catalytic hydrogenation, and to use this knowledge to optimize the experimental approaches in order to gain better control in the synthesis and modification of carbon …
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The effect of membrane lipid hydrogenation on drug metabolising activity
… molecular weights were synthesized, for the catalytic hydrogenation of double bonds within the membranes of biological systems. The use of these catalysts would therefore allow investigation as to whether the unsaturated nature of membrane fatty acids does have a role in determining …
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Selective hydrogenation for industrial 1-hexene purification
Previous reports identified selective catalytic hydrogenation as a possible route to the purification of industrial 1-hexene streams. Even so, reported performance has been poor and, consequently, the principal aim of this study is to adjust operating conditions so as to improve process performance …
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Selective hydrogenation for industrial 1-hexene purification
Previous reports identified selective catalytic hydrogenation as a possible route to the purification of industrial 1-hexene streams. Even so, reported performance has been poor and, consequently, the principal aim of this study is to adjust operating conditions so as to improve process performance …
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Scope and stereochemistry of carbon-carbon bond formation via addition of carbon nucleophiles to nitrones
… was accomplished by either lithium-ammonia or catalytic hydrogenation of their hydroxyamino carbonates. N-Deoxygenation of silyl ketene acetal adducts was effected by catalytic hydrogenation using palladium as a catalyst.
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Synthesis and Characterization of New Platinum Group Metal Cluster Complexes Containing Tin and Germanium Ligands
… group metal that is known for its performance in catalytic hydrogenation/dehydrogenation reactions. Reacting ruthenium clusters with either HSnPh3 or H2SnPh2 yields a fairly large number of new bimetallic ruthenium-tin clusters that could be precursors to catalysts that are superior to those …
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The asymmetric synthesis of amino acids via electrophilic glycinates
… to afford the amino acid precursors 134. Catalytic hydrogenation of homologated heterocycles 134 directly furnishes the zwitterionic α-amino acids in high enantiomeric excess. Dissolving metal reduction of 134 permits the preparation of unsaturated amino acids while use of …
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Reductions by Cobalt-Catalyzed Production of Hydrogen Gas from NaBH4 in a Two-Chamber System
… a <em>two-chamber system </em>for conducting catalytic hydrogenation reactions by obtaining hydrogen (H<sub>2</sub>) gas from stable sodium borohydride (NaBH<sub>4</sub>). Whereas NaBH<sub>4</sub> is widely used for a variety of reductions and is known to produce H<sub>2</sub> gas in protic …
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