534-15-6Relevant articles and documents
Kinetics and Mechanistic Study of the Methanol Homologation with Cobalt-Ruthenium mixed Catalyst
Watanabe, Kazuhiro,Kudo, Kiyoshi,Sugita, Nobuyuki
, p. 2029 - 2037 (1985)
The role of each catalyst was examined in detail in the methanol homologation with cobalt-ruthenium miwed catalyst.Cobalt catalyst showed much higher activity for the hydrocarbonylation of methanol than ruthenium.On the other hand, the hydrogenation of acetaldehyde proceeded much more rapidly by ruthenium catalyst.The rate of methanol homologation in 1,4-dioxane with cobalt-ruthenium mixed catalyst system was found to be of the first order with respect to the partial pressure of CO.The in situ IR spectra indicated that (1-) was an active species for the hydrocarbonylation of methanol and that existed under the reaction conditions.On the basis of both the kinetic studies and in situ IR spectral observations, the reaction mechanism of methanol homologation was fully discussed.
High activity cobalt based catalysts for the carbonylation of methanol
Marr, Andrew C.,Ditzel, Evert J.,Benyei, Attila C.,Lightfoot,Cole-Hamilton, David J.
, p. 1379 - 1380 (1999)
[Cp(*)Co(CO)2] in the presence of PEt3 and Mel catalyses the carbonylation of methanol with initial rates up to 44 mol dm-3 h-1 before decaying to a second catalytic phase with rates of 3 mol dm-3 h-1; [CoI(CO)2(PEt3)2], which is trigonal bipyramidal with axial PEt3 ligands, has been isolated from the final reaction solution.
FLASH VACUUM THERMOLYSIS OF 2-BROMOETHANOL. FORMATION OF &α-BROMOETHYLETHERS VIA 1-BROMOETHANOL.
Jenneskens, Leonardus W.,Wiersum, Ulfert E.,Ripoll, Jean-Louis
, p. 6489 - 6492 (1988)
Flash Vacuum Thermolysis of 2-bromoethanol (2) leads to the quantitative formation of 1-bromo-1-(1-bromoethoxy)ethane (5, di-α-bromoethylether).Low temperature IR spectroscopy shows that 5 arises from the dimerization of 1-bromoethanol (3), which is observed below -100 deg C as the primary product.
Gas-Phase NMR Studies of Chemical Equilibria. 1. Methodology
Harris, Robin K.,Rao, Renee C.
, p. 580 - 586 (1983)
Methods for obtaining 1H NMR spectra of gases are discussed.Particular attention is paid to the nature of the tube and to the use of 'second sample' field/frequency locking.The question of the chemical shift reference is examined, and some results for tetramethylsilane gas are presented.Representative spectra are shown for three types of organic equilibria in the gas phase: keto-enol tautomerism, addition of methanol to acetaldehyde and Z-E isomerism of acetaldoxime.
Functional methacryloyoxy acetals: II. Electophilic addition of alcohols to vinyloxyalkyl methacrylates
Gorelova,Oparina,Parshina,Gusarova,Trofimov
, p. 1683 - 1687 (2001)
Alcohols of various structures, in particular, ethylene, acetylene, fluorocontaining alcohols, add regio-and chemoselectively to the vinyloxy group of vinyloxyalkyl methacrylates at 20-40°C in the presence of catalytic quantities of trifluoroacetic acid a
Tetrachloromethane Hydrodechlorination over Palladium-Containing Nanodiamonds
Belkina, E. G.,Gruzdev, M. S.,Kalmykov, P. A.,Klyuev, M. V.,Lysenok, A. A.,Magdalinova, N. A.
, p. 1148 - 1153 (2020/10/14)
Abstract: Using nanodiamonds of the UDD-STP brand 1 wt % palladium-containing nanodiamonds are obtained and tested as catalysts of tetrachloromethane hydrodechlorination under mild conditions (solvents, ethanol and methanol; Т = 298–318 K; PH2 = 0.1 MPa). The catalytic properties of the obtained material and a palladium-containing analog based on activated carbon are compared. It is shown that the hydrodechlorination reaction occurs in a stepwise manner via two pathways: to form products with a smaller content of chlorine, for example, chloroform, and to yield oxygen-containing products, for example, diethyl carbonate. The qualitative and quantitative compositions of reaction products are determined by gas chromatography/mass spectrometry.
Catalytic Hydromethoxylation of Acetylene over Pre-Activated K2PdCl4
Khazipov, O. V.,Krasnyakova, T. V.,Mitchenko, S. A.,Nikitenko, D. V.
, p. 879 - 885 (2020/12/30)
Abstract: The catalytic addition of methanol to the triple bond of acetylene occurred on the surface of mechanically pre-activated K2PdCl4 and formed dimethylacetal and the vinyl chloride by-product. The addition of alcohol occurs regioselectively in accordance with the Markovnikov rule. The stereoselectivity of acetylene hydrochlorination corresponds to the trans-addition of H and Cl to the C≡C triple bond of acetylene. The effective activation energies of reaction routes were determined. A possible mechanism of formation of H3C–CH(OCH3)2 and H2C=CHCl was proposed.
Photocatalytic decarboxylation of lactic acid by Pt/TiO2
Liu, Kaituo,Litke, Anton,Su, Yaqiong,Van Campenhout, Bart G.,Pidko, Evgeny A.,Hensen, Emiel J. M.
, p. 11634 - 11637 (2016/10/04)
A photocatalytic route for the conversion of lactic acid to acetaldehyde in water is demonstrated. Direct UV photolysis of lactic acid yields CO2 and ethanol via a radical mechanism. Pt/TiO2 considerably increases the rate of lactic acid decarboxylation with acetaldehyde, H2 and CO2 as the main products. A concerted photodecarboxylation/dehydrogenation mechanism is proposed.
A catalytic conversion method for preparing pyruvate ester of lactic acid (by machine translation)
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Paragraph 0017, (2016/10/10)
A method for preparing pyruvate through catalytic conversion of lactic acid is provided; according to the method, with oxygen or air as an oxidant, alcohol as a solvent, and molybdovanadophosphoric heteropoly acid and/or tungstovanadophosphoric heteropoly acid as a catalyst, and by coupling of a catalytic oxidation reaction and an esterification reaction, lactic acid is converted into pyruvate by one step. The method directly adopts oxygen or air as the oxidant and is green and safe; the used raw material lactic acid is obtained directly from conversion of biomass resources, moreover, the reaction conditions are mild, and the method has important application prospects.
Conversion of alcohols to longer chain aldehydes or alcohols
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Page/Page column 34-36, (2016/04/20)
Processes are provided for contacting at least one Cn alcohol equivalent having n carbon atoms and at least one Cn+1 alcohol equivalent having (n+1) carbon atoms with a Guerbet catalyst to form a product composition comprising a product compound having the structure: wherein: C is a carbon atom; H is a hydrogen atom; Q is an alcohol or aldehyde group having one carbon; R is a linear alkyl group having n carbon atoms; and T is an alkyl group having (n?1) carbon atoms, except that when n=1, T is methyl.
