Mixed anhydrides of cyclohexanecarboxylic acid with sulphonic acids

Tempesti, E.; Giuffré, L.; Sioli, G.; Fornaroli, M.; AIROLDI, GIUSEPPI

doi:10.1039/p19740000771

Cited by 10 publications

(5 citation statements)

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“…Although the kinetics parameters have not been measured accurately, some works have demonstrated that the formation of mixed anhydride from CCA is a reversibly fast process, and the side reaction is a less fast one. ,, The mechanism also shows that sulfuric acid seems like a catalyst in this system. This system is a liquid−liquid competitively consecutive system as shown in Figure .…”

Section: Reaction Between Cyclohexanecarboxylic Acid and Oleummentioning

confidence: 97%

Improving Selectivity of Temperature-Sensitive Exothermal Reactions with Microreactor

Wang

Lü

Shao

et al. 2008

Ind. Eng. Chem. Res.

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The selectivity of temperature-sensitive exothermal reaction, especially for a fast reaction system, is hard to control in chemical synthesis process. Traditionally, reducing the reaction temperature is applied to control byproduct. Nowadays, the confinement of the reaction temperature can be released by using microreactors. To demonstrate this, the fast exothermal reaction between cyclohexanecarboxylic acid and oleum was chosen as an experimental system in this work. An adiabatic micropore dispersion capillary reactor was developed to control the reaction selectivity at relatively high temperature. The results showed that 5-30 µm dispersed scale of oleum was reached in this microreactor, and nearly 100% selectivity was obtained at a relatively high product temperature, 50-60 °C, with 100% conversion of oleum.

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Section: Reaction Between Cyclohexanecarboxylic Acid and Oleummentioning

confidence: 97%

Improving Selectivity of Temperature-Sensitive Exothermal Reactions with Microreactor

Wang

Lü

Shao

et al. 2008

Ind. Eng. Chem. Res.

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“… The equilibrium constant of this reaction is 3.2 × 10 4 times higher than the proton exchange reaction, so the sulfur trioxide can be consumed completely during the reaction 14. According to previous works,16, 17 those reactions are fast reactions. The reactant oleum is a reactive reactant, and the reaction is often operated by dripping oleum into large volume of CCA solution with strong stirring.…”

Section: Methodsmentioning

confidence: 86%

Measuring enthalpy of fast exothermal reaction with micro‐reactor‐based capillary calorimeter

et al. 2009

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This work presents a new micro-reactor-based capillary calorimeter for the enthalpy measurement of fast exothermal reactions. The new calorimeter was operated in the continuous way and the reaction enthalpy can be easily measured with the online temperatures from detached sensor chips. A standard reaction system and an industrial reaction system were selected to test this new calorimeter with homogeneous and heterogeneous reaction processes. The measurement was taken place at nearly adiabatic situations and the reaction enthalpy was calculated from the rising of temperature. High accuracy and good repeatability were obtained from this new calorimeter with relative experimental errors less than 3.5% and 2.4%, respectively. The temperature response was quick in this new calorimeter too, which was benefit to the low cost of reactive component. The fast and accurate measurement was contributed to the nice mixing performance and strict plug flowing in the calorimeter. V

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“…These two main reactions are ultra-fast reactions [16,17]. They take place almost instantaneously when the reactants meet and stop quickly when the feed stream is terminated [18].…”

Section: Working Systemmentioning

confidence: 99%

Kinetics research on fast exothermic reaction between cyclohexanecarboxylic acid and oleum in microreactor

Wang

Lü

Xia

et al. 2011

Chemical Engineering Journal

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Mixed anhydrides of cyclohexanecarboxylic acid with sulphonic acids

Cited by 10 publications

References 0 publications

Improving Selectivity of Temperature-Sensitive Exothermal Reactions with Microreactor

Improving Selectivity of Temperature-Sensitive Exothermal Reactions with Microreactor

Measuring enthalpy of fast exothermal reaction with micro‐reactor‐based capillary calorimeter

Kinetics research on fast exothermic reaction between cyclohexanecarboxylic acid and oleum in microreactor

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