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2 edition of The mercury photosensitized hydrogenation of ethylene. found in the catalog.

The mercury photosensitized hydrogenation of ethylene.

Allan Kahn

The mercury photosensitized hydrogenation of ethylene.

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Published .
Written in English


Edition Notes

Thesis (PhD) - University of Toronto, 1947.

The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL19728905M


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The mercury photosensitized hydrogenation of ethylene. by Allan Kahn Download PDF EPUB FB2

Mercury-photosensitized hydrogenation of ethylene. Callear and W. Pereira Mercury-photosensitized hydrogenation of ethylene (journal articles, books or book chapters) The mercury photosensitized hydrogenation of ethylene.

book not need to formally request permission to reproduce material contained in this article provided that the correct acknowledgement is given with the   The hydrogenation of ethylene, ethylene‐d4 and partially deuterized ethylene photosensitized by excited mercury to λ = A has been studied.

It has been found that the rate of hydrogenation of the deutero‐compound is more rapid than that of ethylene under comparable conditions. With excess hydrogen, the rate is independent of the ethylene :// Abstract The hydrogenation of ethylene, ethylene-d 4 and partially deuterized ethylene photosensitized by excited mercury to λ = A has been studied.

It has been found that the rate of hydrogenation of the deutero-compound is more rapid than that of ethylene under comparable J. Abstract The The mercury photosensitized hydrogenation of ethylene.

book photosensitized hydrogenation of propylene has been investigated at 30°, °, and °, using an 8/1 ratio of hydrogen to propylene.

The hydrocarbon products were analyzed with a mass The mercury-photosensitized hydrogenation of ethylene has been studied at various olefine pressures and also in the presence of a separate third body.

The disproportionation to combination ratio of the ethyl radicals which are the primary products of the reaction has been determined and found, under suitable conditions, to be in good agreement with the values obtained with ethyl radicals The hydrogenation of propene has been studied, the products separated by vapour-phase chromatography, and analyzed individually in the mass spectrometer.

The disproportionation to combination ratio for isopropyl radicals has been found to vary with pressure in a similar way to that for ethyl radicals The mercury photosensitized hydrogenation of ethylene. book similar hot radical and deactivation   The mercury-photosensitized reaction of acetylene has been studied with equimolar mixtures of C2H2 and C2D2 under various conditions of pressure, temperature, and additives.

It is shown that the distribution of isotopically substituted benzenes can be explained by a modified excited state mechanism equally as well as, or more favourably than by the free radical :// Disproportionation‐combination ratios have been obtained for small alkyl radicals produced in the mercury‐photosensitized hydrogenation of ethylene, propylene, butene‐1, butene‐2, and isobutene.

For conditions favoring thermalized radicals, kd/kc (ethyl, ethyl) =kd/kc (isopropyl, isopropyl) =The mercury photosensitized hydrogenation of ethylene. book (isopropyl, n‐propyl) =kd/kc (2‐butyl, 2‐butyl) =kd/kc   The Mercury Photosensitized The mercury photosensitized hydrogenation of ethylene.

book of Ethylene, Ethylene‐ d4 and Partially Deuterized Ethylenes. The Journal of Chemical Physics6 (6), DOI: / Photosensitized reactions are photochemical reactions in the presence of sensitizers.

The function of a sensitizer is to transfer energy or to participate in photochemical reactions to form a radical, which then reacts with reactants and converts back to the sensitizer. In many inorganic photochemical reactions, mercury is a common :// The mercury (3P1) photosensitized hydrogenation of ethylene has been studied at room temperature as a function of ethylene concentration, mercury concentration, and light ://   The Mercury Photosensitized Reactions of Ethylene.

The Journal of Chemical Physics9 (12), DOI: / To elucidate further the detailed mechanism, mercury-photosensitized reaction of sulfolane-2,2,5,5-d 4 was carried out. From the analysis of the deuterated ethylenes, it is found that ethylene-d 2 is the major product.

It is concluded that ethylene is formed through the fission of the C 3 C 4 bond of :// Mercury-photosensitized interaction of ethylene and propane Mercury-photosensitized interaction of ethylene and propane Authors contributing to RSC publications (journal articles, books or book chapters) do not need to formally request permission to reproduce material contained in this article provided that the correct acknowledgement This concept was extended to reactions of organic compounds by Taylor (l), who suggested that a chain reaction of hydrogen atoms and ethyl radicals could explain quantum yields greater than unity for the mercury photosensitized hydrogenation of ://   The butane undoubtedly arises from recombination of two ethyl radicals, since this gas is the predominant product in the mercury-photo- sensitized hydrogenation of ethylene (9~.

The low quantum yield and the abnormal products in the methyl iodide decomposition are accounted for by West with the following sequence of reactions: CH3I + he = CH3 The reaction products of both the mercury photosensitized reaction and the direct photochemical reaction are the same, i.e.

acetylene, benzene, orange-colored liquid (presumably bicyclo form of C 8 H 8), polymer and a trace of styrene; the noncondensable products at liquid nitrogen temperature such as hydrogen and methane were not detected. A quantitative experiment has been made on the If the address matches an existing account you will receive an email with instructions to reset your password [8]Bartley,William s for the Preparation of Ethylene Glycol[P].US, [9]Thakur,Deepak S,Roberts,et enation Catalyst,Process for Preparing and Process ofUsing Said Catalyst[P].US, 1 J.

Cashion, D. Le Roy, FREE RADICAL MECHANISMS IN THE MERCURY PHOTOSENSITIZED REACTION OF HYDROGEN WITH ACETYLENE, Canadian Journal of Chemistry,32, 9, CrossRef PDF   proved to be best. Mercury is the most convenient because it also provides an intense source of resonance radiation from its line at Angstroms.

Thus, if mercury vapor is added to the hydrogen, and the mixture is ill~inatedby a mercury source, we get: Hg (ISo) + hV ~Hg (3PI) (3PI) 1 Hg + Hg ~Hg (So) + :// Nickel-based catalysts, supported on diatomite, silica gel and perlite, with high nickel loadings, have been prepared by precipitation-deposition method.

Various nickel precursor salts were used for the preparation of catalyst precursors. In the precursor state, the catalysts were characterized using nitrogen physisorption, mercury porosimetry, infrared, and X-ray diffraction ://   Olson et al., "The Polymerization and Hydrogenation of Ethylene by Means of Excited Mercury Atoms," Feb.pp.

Olson et al., "The Hydrogen-Ethylene Reaction in the Presence of Excited Mercury Atoms," Dec. pp. H atoms have been created by the photolysis of H2S.

These then initiated reactions in mixtures involving acetylene-ammonia-water and ethylene-ammonia-water. In the case of the acetylene system, the products consisted of two amino acids, ethylene and a group of primarily cyclic thio-compounds, but no free sulfur. In the case of the ethylene systems, seven amino acids, including an PHOTOSENSITIZATION EXPERIMENTS WITH VARIOUS METAL VAPOURS PHOTOSENSITIZATION EXPERIMENTS WITH VARIOUS METAL VAPOURS Steacie, E.

INTRODUCTION Photosensitized reactions present a much closer analogy to thermal processes than do direct photochemical reactions, since the reactant molecule receives the energy necessary for   A catalyst is substance that provides a pathway for the reaction to occur rapidly than in mechanism of an uncatalyzed reaction.

The catalyst gets consumed in the first step of the reaction and it can be regenerated in the later step of the reaction.

The During the catalytic hydrogenation of ethyne, ethene is formed first which in the next step is further reduced to ethane. In this reaction, the heat of hydrogenation of the first π bond is higher than that of the second. Internal alkynes are more stable than terminal ones as exemplified by the heat of hydrogenation of isomeric butynes to The kinetics for the selective hydrogenation of acetylene-ethylene mixtures over model Pd() and bimetallic Pd-Ag alloy surfaces were examined using first principles based kinetic Monte Carlo (KMC) simulations to elucidate the effects of alloying as well as process conditions (temperature and hydrogen partial pressure).

You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for ://   the performance of some of the syntheses would include low-pressure hydrogenation apparatus, ultraviolet lamps and reaction vessels, Dry Ice (cold finger) condensers, vacuum sublimation and distillation apparatus, and spectroscopic and chromato-graphic instruments.

In general, an attempt has been made to employ as   Manufacture of ethylene glycol-involves hydrolysis of ethylene carbonate obtained by reacting ethylene oxide and carbon dioxide in presence of catalyst:JP, A[P].

[29] Kazuki K,Kazuhilo M. Ethylene glycol process:US,[P]. [30] › 百度文库 › 高校与高等教育. The hydrogenation reactor is made of the catalyst bed material. It was assumed that the radius of the reactor was m and the height of the reactor was m. The hydrogenation chemical reaction occurred inside the catalytic reactor where the heat was supplied through the organic fluid to drive the endothermal reaction :// Selectivity enhancement in acetylene hydrogenation over modified Pd/TiO2 catalyst.

Catalysis Science & Technology,5(4): – Han Y, Peng D, Xu Z, Wan H, Zheng S, Zhu D. TiO2 supported [email protected] as highly selective catalysts for hydrogenation of acetylene in excess   These patents claim a homogeneous catalyst system for the preparation of olefin (ethylene, -olefin) / carbon monoxide alternating copolymers.

The catalysts consist of at least one Group 11 metal salt (Cu, Ag, Au), a P- or Ncontaining bidentate chelating base, and an oxidizing agent (nitrosium tetrafluoroborate or p-benzoquinone) Gold Bulletin32(1) 17 which is not  › 百度文库 › 高校与高等教育.

the apparatus shown in Figure 6 to both oxidize and then reduce mercury. Figure 6. Lavoisier's mercury calx apparatus from The History of Chemistry, John Hudson, Chapman & Hall, New York, In the first part of the experiment, Lavoisier used this apparatus to heat mercury in   G.

Vermont, P. Riccobono, and J. Blake: The photosensitized reaction of dichloromaleic anhydride with benzene. A novel variation in the photochemistry of maleic anhydride derivatives.

A novel variation in the photochemistry of maleic anhydride :// Full text of "Catalytic hydrogenation and reduction" and may be regulated as desired by inter- posing in the path of the water a mercury column of suitable height, arranged to act as a valve in that it releases the water in excess of that necessary for the maintenance of the pressure desired.

The hydrogenation of ethylene to ethane was Photosensitized oxidation. An alcoholic solution of levopimaric acid containing a sensitizing dye, e.g., methylens blue, readily absorbs one mole of oxygen, when contacted with air, to produce quantitatively a peroxide, 8,peroxide,14 dihydroabietic acid, by addition.

Hydrogenation   Mercury-Photosensitized C-H Bond Functionalization p. Activation of Carbon-Hydrogen Bonds in Alkanes and Other Organic Molecules Using Organotransition Metal Complexes p. Selective Hydroxylation of Hydrocarbons by Platinum Salts in Aqueous Media: Direct Conversion of Ethanol to Ethylene Glycol p.

The electronic structures of methane, ethane, ethylene and formaldehyde studied by high-resolution molecular photoelectron spectroscopy, Intern. Mass ://?ID=C&Mask=2F. @article{osti_, title pdf {Ion beam rehydrogenation and post-hydrogenation of a-Si:H}, author = {Tsuo, Y S and Deng, X J and Smith, Pdf B and Xu, Y and Deb, S K}, abstractNote = {We have studied the rehydrogenation and post-hydrogenation of a-Si:H using a Kaufman ion beam source.

The achievement of an air-mass-one (AM1), photo-to-dark conductivity ratio of x 10/sup 5/ with a The dynamic interconversion of large covalent organic cages was achieved simply by heating download pdf acid/base treatment. In their Communication on page ff., N.

Iwasawa and co‐workers show that a mixture of the boroxine cages 12‐mer and 15‐mer was cleanly converted into a pyridine adduct of the boroxine cage 9‐mer upon treatment with pyridine, and the geometry of N‐coordinated boron Hydrogenation of ebook applies in another reactor with presence of Nickel catalyzer to ebook ethane as a final product.

Develop BFD for these processes. CH3CH2OH CH2=CH2 + H2 H2SO4 Ni Answer: CH2=CH2 + H2O CH3CH3 Hot water out Ethylene, CH2CH2 (g) Ethylene liq. CH2CH2 (l) Ethanol, C2H5OH H2SO4 Reactor 1 CH2CH2 H2 O Cold water in