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

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Pet. Chem. USSR (Engl. Transl.); (United States)

DOI:https://doi.org/10.1016/0031-6458(82)90030-2· OSTI ID:5984919

Korenevskaya, R G; Kuz'mina, G N; Markova, E I; Sanin, P I

A kinetic study was used to determine the interaction of anti-oxidants-zinc dialkyldithiocarbamates with cumyl peroxy radicals and cumyl hydroperoxide. Effective rate constants of the reaction of cumyl peroxide radicals K/sub 7//sup */ at 60/sup 0/C with di-n-butyldithiocarbamate and zinc di-iso-octyl dithiocarbamate were determined to be (2.9 +/- 0.5) x 10/sup 3/ and (9.6 +/- 1.5) x 10/sup 3/ mole.sec, respectively. Effective rate constants derived in the model reaction of initiated oxidation of cumene in the presence of zinc dialkyl dithiocarbamates are not constants of the elementary stage, but of the gross process. Formulae were derived for the reaction rate constant of cumyl hydroperoxide with zinc di-n-butyldithiocarbamate and di-iso-octyl dithiocarbamate, which were calculated to be 1.14 x 10/sup 6/ exp ((-54,000 +/- 4700)/RT) and 8.3 x 10/sup 4/ exp ((-45,000 +/- 7200))/RT) 1./mole.sec, respectively. Results show that products of decomposition of zinc dialkyl dithiocarbamates take part in reactions with peroxide radicals and cumyl hydroperoxide, intensifying the inhibiting action of antioxidants on oxidation of hydrocarbons. 12 references, 2 figures, 1 table.

• OSTI ID: 5984919
• Journal Information: Pet. Chem. USSR (Engl. Transl.); (United States), Journal Name: Pet. Chem. USSR (Engl. Transl.); (United States) Vol. 22:3; ISSN PECHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ANTIOXIDANTS
AROMATICS
CARBAMATES
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACID SALTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPLEXES
CORRELATIONS
CUMENE
DATA
DATA ANALYSIS
DECOMPOSITION
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
INHIBITION
KINETICS
MATHEMATICAL MODELS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PEROXY RADICALS
QUANTITY RATIO
RADICALS
REACTION KINETICS
TIME DEPENDENCE
ZINC COMPLEXES