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Kinetic regularities of interaction of zinc dialkyldithiocarbamates with peroxide radicals and cumyl hydroperoxide

Korenevskaya, R.G. / Kuz'mina, G.N. / Markova, Ye.I. / Sanin, P.I.

Abstract 1. 1. A kinetic study was made of the interaction of anti-oxidants-zinc dialkydithiocarbamated with cumylperoxy radicals adn cumyl hydroperoxide. 2. 2. Effective rate constants of the reaction of cumyl peroxide radicals $k 7$ ^∗) at 60°C with di-n-butyldithiocarbamabe and zinc di-isooctyl dithiocarbomate were determined and found to be (2·9±0·5) × 10³ and (9·6 ± 1·5) × × 10³ mole·sec, respectively. 3. 3. It was shown that constants $k$ ⁷ ^∗ derived in the model reaction of initiated oxidation of cumene in the presence of zinc dialkyl dithiocarbamated are not constants of the elementary stage, but of the gross process. 4. 4. Formulae were derived for the reaction rate constant of cumyl hydroperoxide with zinc di-n-butyldithiocarbamate and di-iso-octyl dithiacarbamate, exp [(−45,700 ± 7200])/RT] 1./mole·sec, respectively. 5. 5. It was shown that products of decomposition of zinc dialkyl dithiocarbamated take part in reactions with radicals and cumyl hydroperoxide, intersifying the inhibiting action of antioxidants on oxidation of hydrocarbons.

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Kinetic regularities of interaction of zinc dialkyldithiocarbamates with peroxide radicals and cumyl hydroperoxide

Korenevskaya, R.G. / Kuz'mina, G.N. / Markova, Ye.I. / Sanin, P.I.

Abstract 1. 1. A kinetic study was made of the interaction of anti-oxidants-zinc dialkydithiocarbamated with cumylperoxy radicals adn cumyl hydroperoxide. 2. 2. Effective rate constants of the reaction of cumyl peroxide radicals $k 7$ ^∗) at 60°C with di-n-butyldithiocarbamabe and zinc di-isooctyl dithiocarbomate were determined and found to be (2·9±0·5) × 10³ and (9·6 ± 1·5) × × 10³ mole·sec, respectively. 3. 3. It was shown that constants $k$ ⁷ ^∗ derived in the model reaction of initiated oxidation of cumene in the presence of zinc dialkyl dithiocarbamated are not constants of the elementary stage, but of the gross process. 4. 4. Formulae were derived for the reaction rate constant of cumyl hydroperoxide with zinc di-n-butyldithiocarbamate and di-iso-octyl dithiacarbamate, exp [(−45,700 ± 7200])/RT] 1./mole·sec, respectively. 5. 5. It was shown that products of decomposition of zinc dialkyl dithiocarbamated take part in reactions with radicals and cumyl hydroperoxide, intersifying the inhibiting action of antioxidants on oxidation of hydrocarbons.

Kinetic regularities of interaction of zinc dialkyldithiocarbamates with peroxide radicals and cumyl hydroperoxide

Korenevskaya, R.G. / Kuz'mina, G.N. / Markova, Ye.I. / Sanin, P.I.

Abstract 1. 1. A kinetic study was made of the interaction of anti-oxidants-zinc dialkydithiocarbamated with cumylperoxy radicals adn cumyl hydroperoxide. 2. 2. Effective rate constants of the reaction of cumyl peroxide radicals $k 7$ ^∗) at 60°C with di-n-butyldithiocarbamabe and zinc di-isooctyl dithiocarbomate were determined and found to be (2·9±0·5) × 10³ and (9·6 ± 1·5) × × 10³ mole·sec, respectively. 3. 3. It was shown that constants $k$ ⁷ ^∗ derived in the model reaction of initiated oxidation of cumene in the presence of zinc dialkyl dithiocarbamated are not constants of the elementary stage, but of the gross process. 4. 4. Formulae were derived for the reaction rate constant of cumyl hydroperoxide with zinc di-n-butyldithiocarbamate and di-iso-octyl dithiacarbamate, exp [(−45,700 ± 7200])/RT] 1./mole·sec, respectively. 5. 5. It was shown that products of decomposition of zinc dialkyl dithiocarbamated take part in reactions with radicals and cumyl hydroperoxide, intersifying the inhibiting action of antioxidants on oxidation of hydrocarbons.

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Title:

Kinetic regularities of interaction of zinc dialkyldithiocarbamates with peroxide radicals and cumyl hydroperoxide

Contributors:

Korenevskaya, R.G. (author) / Kuz'mina, G.N. (author) / Markova, Ye.I. (author) / Sanin, P.I. (author)

Published in:

Petroleum Chemistry: USSR (English Translation of Neftekhimiya) ; 22 ; 127-133

Publication date:

1983-01-01

Size:

7 pages

ISSN:

DOI:

https://doi.org/10.1016/0031-6458(82)90030-2

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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