- Assessment of formation channels of cyclohexyl mono- and dicarboxylates in oxidation of cyclohexane
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Temperature dependences of the rate constants of the esterification reactions of the main carboxylic acids contained in oxidized cyclohexane (adipic, caproic, and formic) by cyclohexanol in a nonpolar medium were determined by solving the inverse kinetic problem.
- Kotel'Nikova,Revkov,Voronina,Perkel
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- Asymmetric adipic acid cyclohexanol isooctyl alcohol ester and synthetic method and application thereof
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The invention provides asymmetric adipic acid cyclohexanol isooctyl alcohol ester and a synthetic method and application thereof. The research is jointly funded by the science and technology fund project of Guizhou Provincial Science and Technology Bureau
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Paragraph 0023
(2016/10/31)
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- Synergism of microwaves and immobilized enzyme catalysis in synthesis of adipic acid esters in nonaqueous media
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Low-energy microwave irradiation leads to enhancement by a factor of up to 2.63 in comparison with conventional heating in immobilized lipase-catalyzed esterification of adipic acid with various alcohols and this effect is due to the greater frequency of collision, without any change in activation energy of the two modes of heating. Copyright Taylor & Francis, Inc.
- Yadav, Ganapati D.,Lathi, Piyush S.
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p. 1699 - 1705
(2007/10/03)
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- NONCHAIN CONVERSION OF alpha -DIKETONES AND TRANSACYLATION OF CARBOXYLIC-ACID ANHYDRIDES UNDER AUTOXIDATION CONDITIONS.
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The present investigation produced the following conclusion. The oxidation of 8,9-hexadecanedione by peroxylauric acid in benzene solution conforms to the kinetic equation for a second-order reaction. The oxidation is accompanied by transacylation of the caprylic anhydride formed with lauric acid. The anhydrides formed by transcylation take part in the formation of ester products of autoxidation. Lauric acid actively catalyzes the reaction of 8,9-hexadecanedione with peroxylauric acid.
- Perkel',Freidin,Neginskaya,Stolyankova,Ivanova
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p. 1444 - 1449
(2007/10/02)
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- SEQUENCE OF FORMATION OF PRODUCTS OF OXIDATIVE DECOMPOSITION OF CYCLOHEXANOL.
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Oxidative decomposition of cyclohexanol by the action of molecular oxygen may be the consequence of various processes. One of these is consecutive conversion of the intermediately formed cyclohexanone. The main products in this case are the simultaneously formed adipic acid and epsilon -caprolactone and also, according to recent data, adipic anhydride. Another process involves radical decomposition of 1-hydroxy-1-hydroperoxycyclohexane, proceeding with cleavage of the C-C bond and formation (omitting the ketone stage) of adipic and caproic acids. However, it is most often assumed that formation of adipic acid during oxidation of cyclohexanol proceeds predominantly by the first route. The present work was undertaken in order to establish the relative significance, on the basis of the composition of the products of cyclohexanol oxidation, of the mechanisms, and to examine the possibility of influencing the course of the process.
- Neginskaya,Freidin,Dolgikh,Khaloshina
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p. 2326 - 2330
(2007/10/02)
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