Authors:A. Foppoli, L. Zema, A. Maroni, M. Sangalli, M. Caira and A. Gazzaniga
at an early identification of all possible crystalline modifications, are nowadays a fundamental step in the pharmaceutical development of new drugs and drug products [ 1 ].
Authors:Haihua Wang, Yonghao Ni, M. Sarwar Jahan, Zehua Liu and Thioni Schafer
potential raw material for polymers [ 18 ]. Mixture of ethanol/water [ 19 , 20 ], in particular, a 60% ethanol solution [ 21 ], can be used to dissolve lignin in woody biomass, for example, mixed hardwood. Aceticacid and formic acid [ 22 – 24 ] are also
decomposition, which demands large excess of H 2 O 2 . Difficulty in the preparation and recovery, the high cost and toxic nature of the metal complexes further prompted metal free oxidation using H 2 O 2 in organic synthesis. Acids like aceticacid [ 38 ] and
Authors:J. K. Jósvai, S. Koczor, Cs. Szabóky, M. Ladányi and M. Tóth
Conference for the ISCE, Stockholm , Sweden, 29 June –23 July, 2015, Abstract book, 418 p.
Jósvai , J. K. , Koczor , S. and Tóth , M. ( 2016 a): Traps baited with pear ester and aceticacid attract both sexes of Hedya nubiferana (Lepidoptera
A simple method of obtaining indole-3-acetic acid/ growth stimulating plant hormone/ labelled with tritium has been described. The preparate has specific radioactivity of 455 MBq/mmol, and 50% yield as compared to the initial amount of used substance.
The exchange reaction between14CO2 and sodium salt of p-fluorophenyl acetic acid was found to proceed with greater than 50% isotope incorporation when salt to CO2 ratio was 61. The carboxyl-C-14 labelled p-fluorophenyl acetic acid was isolated in a pure form using small chemical concentrations of radioactive14CO2 of high specific activity /30 mCi/mmol/.
Authors:V. Belevskii, S. Belopushkin and V. Feldman
The ESR spectra of -irradiated, at –196 °C, solutions of acetic acid and acetic anhydride were studied depending on their concentrations in CFCl3. The structure of thus produced radical cations is confirmed with the deuterium substituted analogues. It has been shown that the ion-molecular reaction of the radical cation CH2COOH+ in the isolated dimer takes place for the dilute solutions of acetic acid in CFCl3 resulting in the formation of CH3COO follwed by its decomposition to CH3+CO2 while the radicals CH2COOH are formed via secondary processes. The reactions of radical cations of acetic oxide have been also studied.
The kinetics of the esterification of acetic acid with butanol in the presence of sulfated zirconia was studied. Several kinetic
models were tested to correlate the kinetic data. The experimental data was represented by the Eley–Rideal mechanism and it
is found that sulfated zirconia is suitable for this reaction since the activation energy reduced from 58.0 to 49.2 kJ/mol.
The liquid phase esterification of butanol with acetic acid was carried out in a batch reactor at temperatures of 328, 333,
338 and 343 K, with an alcohol to acid molar ratio of 1. The equilibrium constants were determined in separate experiments
at 328, 333, 338 and 343 K and calculated as 29.9, 29.3, 28.6 and 28.0, in order. Before these kinetic and equilibrium runs,
the catalyst was prepared by impregnating zirconia with H2SO4. The prepared catalyst was characterized by thermal analysis, XRD, SEM, BET-surface area and IR analysis.
This research addresses itself to the study of the mechanism of the acetic acid decarboxylation in Na-Montmorillonite exposed to ionizing radiation. The results obtained indicated that the decarboxylation reaction is enhanced several times by the irradiation. This behavior is probably due to an oxidation reaction at the edges of the clay. Also it is by energy transfer from the clay to adsorbed molecules by an interaction of non-equilibrium charge carriers with the adsorbed molecules.