Studies on kinetics of catalytic isomerization of methyl linoleate

1985 ◽  
Vol 62 (4) ◽  
pp. 734-738 ◽  
Author(s):  
V. M. Deshpande ◽  
R. G. Gadkari ◽  
D. Mukesh ◽  
C. S. Narasimhan
Keyword(s):  
Methyl Linoleate ◽  
Catalytic Isomerization ◽  
Kinetics Of

Kinetics of the catalytic isomerization and disproportionation of rosin over carbon-supported palladium

2009 ◽  
Vol 152 (1) ◽  
pp. 242-250 ◽  
Author(s):  
Linlin Wang ◽  
Xiaopeng Chen ◽  
Jiezhen Liang ◽  
Yueyuan Chen ◽  
Xiaodong Pu ◽  
...  
Keyword(s):  
Catalytic Isomerization ◽  
Supported Palladium ◽  
Kinetics Of

The autoxidation of unsaturated lipids in micelles. Synergism of inhibitors vitamins C and E

1983 ◽  
Vol 61 (6) ◽  
pp. 1288-1290 ◽  
Author(s):  
Lawrence Ross Coates Barclay ◽  
Steven Jeffrey Locke ◽  
Joseph Mark MacNeil
Keyword(s):  
Linoleic Acid ◽  
Methyl Linoleate ◽  
Sodium Dodecyl ◽  
Square Root ◽  
Micellar Phase ◽  
Chain Initiation ◽  
Unsaturated Lipids ◽  
Sds Micelles ◽  
Initiator Efficiency ◽  
Kinetics Of

The kinetics of thermally (30 °C) initiated autoxidations of unsaturated lipids, linoleic acid, and methyl linoleate are studied in 0.50 M sodium dodecyl sulfate (SDS) micelles. The rate of chain initiation, R1, was controlled by using known amounts of the thermal initiator, di-tert-butylhyponitrite (DBHN). The initiator efficiency, e, determined by the induction period method with x-tocopherol, was 0.30 for linoleic acid and varied (0.30 to 0.36) for methyl linoleate autoxiation as the concentration of the ester increased. The rate of autoxidation of linoleic acid follows the classical rate law since it is proportional to the substrate concentration and to the square root of chain initiation. The oxidizability of linoleic acid measured in micelles is 4.09 × 10−2 M−1/2 s−1/2. The oxidizability of methyl linoleate varied from 2.37 × 10−2 to 6.92 × 10−2 M−1/2 s−1/2 as the amount of solubilized ester increased. The latter results are indicative of pooling of the ester in the micellar phase. Additions of aqueous solutions of ascorbic acid to α-tocopherol-inhibited micellar autoxidations result in very significant extensions of the efficient inhibition period compared to that obtained with α-tocopherol alone. The mechanism of this synergism is briefly discussed.

Effect of Tocopherols on the Peroxidative Kinetics of Ethyl Eicosapentaenoate and Methyl Linoleate

1992 ◽  
Vol 56 (12) ◽  
pp. 2060-2061 ◽  
Author(s):  
Atsuyoshi Nishina ◽  
Yasuko Sakurai ◽  
Ken-ichi Hashimoto ◽  
Yoshihiro Isoda ◽  
Hideo Inatomi
Keyword(s):  
Methyl Linoleate ◽  
Kinetics Of

scholarly journals The catalytic isomerization of buten-1

1941 ◽  
Vol 178 (972) ◽  
pp. 106-117 ◽  
Keyword(s):  
Double Bond ◽  
Hydrogen Pressure ◽  
Square Root ◽  
Double Bond Migration ◽  
Rate Determining Step ◽  
Catalytic Isomerization ◽  
Rate Of Reaction ◽  
Hydrogenation Reactions ◽  
Kinetics Of ◽  
Catalytic Exchange

It has been shown that butene-1 undergoes isomerization to butene-2 on a nickel catalyst in the presence of hydrogen. B y using deuterium, this double-bond migration has been examined simultaneously with the exchange and hydrogenation reactions. The kinetics of double-bond migration and hydrogenation at 65° C were found to be identical, the rate of reaction in both cases being proportional to the square root of the butene pressure and to the square root of the hydrogen pressure. Energies of activation for the three reactions were measured over the temperature range 76-126° C and the following values found: Exchange 9.0 kcal. Hydrogenation 2.5 ,, Double-bond migration 5.9 ,, At the lowest temperatures, the rate of double-bond migration was about six times that of exchange. These facts are in agreement with the theory that the catalytic exchange between olefines and deuterium takes place through the formation of an associative complex. The rate-determining step in the double-bond migration is the second, fast step of the exchange reaction, viz.

scholarly journals Kinetics of Oxidation of Different Depths of Methyl Linoleate in Bulk Phase

2014 ◽  
Vol 20 (2) ◽  
pp. 183-187 ◽  
Author(s):  
Tiezheng Ma ◽  
Takashi Kobayashi ◽  
Shuji Adachi
Keyword(s):  
Methyl Linoleate ◽  
Bulk Phase ◽  
Kinetics Of Oxidation ◽  
Different Depths ◽  
Kinetics Of
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