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  • 1955-1959  (20)
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Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Spectroscopic study of the intermediate product and intermediate stage of reaction in the oxidation of acetaldehyde by peroxyacetic acid (1956)
    Springer
    Russian chemical bulletin 5 (1956), S. 385-389 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. The intermediate product formed in the oxidation of acetaldehyde by peroxyacetic acid was isolated in the form of crystals. A band at 847 cm−1 was found in the absorption spectrum of its solution, and this was ascribed to the vibration of the peroxy link in the molecule of the intermediate product. 2. The variation of the spectrum of the reacting mixture with time is in full accord with a stagewise reaction mechanism. The presence of an intermediate stage and an intermediate product is quite clearly manifest in the spectrum — a fact that indicates that the application of infrared spectroscopy to the study of oxidation by peroxy compounds forms a promising line of attack on this problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01191834
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of solvents on the rate of oxidation of acetaldehyde by peroxyacetic acid from the point of view of intermolecular hydrogen bonding (1956)
    Springer
    Russian chemical bulletin 5 (1956), S. 391-395 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary It was shown that retardation of reaction found in some solvents is due to the blocking effect of solvent molecules hydrogen-bonded to peroxyacetic acid molecules. The presence of hydrogen bonds between peroxyacetic acid molecules and solvent molecules (nitromethane, acetone) was established by the determination of infrared absorption spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01191835
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  • 3
    Electronic Resource
    Electronic Resource
    Concentration limits for flame propagation in mixtures of hydrogen and oxides of nitrogen (1956)
    Springer
    Russian chemical bulletin 5 (1956), S. 779-785 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The concentration limits were determined for flame propagation in mixtures of hydrogen with nitrogen oxides (N2O, NO2, NO) and an inert diluent (nitrogen), the components being taken in various proportions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01169980
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  • 4
    Electronic Resource
    Electronic Resource
    Oxidation of paraffin initiated by nitrogen dioxide (1957)
    Springer
    Russian chemical bulletin 6 (1957), S. 289-297 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. The use of the method of gaseous initiation of liquid-phase chain reactions, consisting in addition of nitrogen dioxide to the air for a short time at thebeginning of the reaction, makes it possible to shorten the induction period for the oxidation of paraffin considerably. With a 30-minute initiation by air containing 0.35% of N02, the induction period is ten hours, as compared to 366 hours in absence of initiator. 2. Greater additions of N02 have an unfavorable effect on the oxidation process, reducing the maximum yields of acids. When there is a continuous feed of N02, acids are not formed in appreciable amount 3. It was shown that water formed in the reaction has an inhibiting effect on the maximum yields of acids and increases the induction period for the oxidation of paraffin initiated by nitrogen dioxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01173332
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  • 5
    Electronic Resource
    Electronic Resource
    Kinetics of the oxidation of acetaldehyde by peroxyacetic acid (1956)
    Springer
    Russian chemical bulletin 5 (1956), S. 375-383 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. On a basis of a comparison of the theoretical and experimental kinetic laws it was shown that the oxidation of acetaldehyde by peroxyacetic acid proceeds in two stages. a) reversible formation of an intermediate peroxy compounds CH2CHO + CH3COOOH = Y. b) decomposition of the intermediate compound into the final product, acetic acids Y → 2CH3COOOH. 2. A study was made of the equilibrium of the reversible reaction resulting in the formation of the intermediate product, and it was shown that the reaction is exothermic, the heat of reaction being 5.5 kcal/mole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01191833
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  • 6
    Electronic Resource
    Electronic Resource
    Retardation of the oxidation of fats by ascorbic esters (1958)
    Springer
    Russian chemical bulletin 7 (1958), S. 1372-1377 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. In admixture with tert-butylmethoxyphenol, ascorbyl palmitate effectively retards air-oxidation processes in rendered animal fats. 2. Replacement of palmitic acid by a mixture of synthetic fatty acids (C14-C16 fraction) in the preparation of ascorbic esters does not affect their antioxidant properties deleteriously. 3. The effectiveness of a mixture of 0.01% of tert-butylmethoxyphenol and 0.02%) ascorbyl palmitate as an antioxidant for rendered animal fats does not depend on the temperature of oxidation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00914848
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  • 7
    Electronic Resource
    Electronic Resource
    The mechanism of ester formation and the reactions of acids in processes of liquid-phase oxidation of hydrocarbons (1959)
    Springer
    Russian chemical bulletin 8 (1959), S. 1661-1666 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. Capric acid undergoes oxidation with the elimination of CO2 in a medium of octadecane which is being oxidized. Oxidation of the acid proceeds to a definite limit, depending on the temperature. Semilogarithmic representations of the kinetic curves of acid oxidation, allowing for the limiting extent of oxidation, are straight lines whose slope is independent of temperature. 2. The limited character of capric acid oxidation indicates the presence of a reaction-retarding process, which develops during the oxidation of octadecane. This retardation may be connected with shortening of the oxidation chains and a decrease in the rate of active center generation. 3. The rate of esterification of capric acid during octadecane oxidation was studied. Analysis of the data obtained showed that the bulk of the esters was not formed as a result of esterification of acids by alcohols.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00912100
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  • 8
    Electronic Resource
    Electronic Resource
    Kinetics of the oxidation of isobutane in the presence of hydrogen bromide (1959)
    Springer
    Russian chemical bulletin 8 (1959), S. 1331-1338 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. We have investigated the kinetics of isobutane oxidation, In the presence of HBr in terms of the consumption of i-C4H1, O1, and HBr and the formations of ten-butyl hydroperoxide, tert-butyl alcohol, acetone, CO,and CO1. 2. We have clearly demonstrated that the process occurs in stages, i.e., macroscopic stages separate in time. The first stage consists in the oxidation of isobutane, mainly to tert-butyl hydroperoxide. Oxygen is no longer consumed in the second stage, and isobutane is oxidized by tert-butyl hydroperoxide to tert-butyl alcohol, the hydroperoxide being converted to acetone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00918570
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  • 9
    Electronic Resource
    Electronic Resource
    Kinetic characteristics of the oxidation of propane with oxygen mixed with chlorine in quartz vessels (1957)
    Springer
    Russian chemical bulletin 6 (1957), S. 17-27 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. A study was made of the oxidation of propane with oxygen mixed with chlorine under flow conditions in a quartz vessel without filling attemperatures:of 250°, 310°, and 355°. 2. It was shown that small additions of chlorine accelerate the oxidation of propane and increase the yield of oxygen-containing products. It was found that large additions of chlorine are undesirable, for the yields of valuable oxygen-containing products are not increased and far-reaching oxidation (combustion) processes are stimulated. 3. It was found that one of the molecular intermediate products was an organic peroxide (isopropyl hydroperoxide), which was formed in considerable amount. 4. Schemes proposed in the literature for the oxidation of hydrocarbons were examined in their application to the oxidation of propane, and it was shown that the effect of additions of chlorine is to be attributed mainly to increase in the rate of formation of initiating centers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01168841
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  • 10
    Electronic Resource
    Electronic Resource
    New problems in the field of chain reactions (1957)
    Springer
    Russian chemical bulletin 6 (1957), S. 1322-1333 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01171889
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