Abstract
The reaction of carbon disulfide and o‐phenylene diamine in an alkaline solution of KOH/organic solvent to produce potassium salt of MBI (C6H4(N)(NH)CS–K+) (ArS–K+) is catalyzed by the addition of an effective weak‐base tetrabutylammonium hydroxide (TBAOH or QOH). The role of KOH is to enhance the reaction rate and the conversion. Water is added to dissolve potassium hydroxide and to provide an environment for the reaction of active intermediate (C6H4(N)(NH)CS–Q+, ArSQ; Q+: (C4H9)4N+) and KOH to produce potassium salt of MBI (ArSK). Based on the experimental data, a rational mechanism of the two‐phase reaction is proposed. A simplified kinetic model is developed to describe the behavior of the reaction. The resistance to mass transfer of the catalyst and the reacting species between two phases can be neglected compared with the rate of reaction in the organic phase. Effects of the reaction conditions, including the amount of carbon disulfide, the amount of o‐phenylene diamine, the amount of catalyst, the amount of water, the organic solvent, the amount of KOH, the agitation speed and temperature on the conversion of o‐phenylene diamine are investigated. Potassium hydroxide in an appropriate amount and organic solvent of high dielectric constant are recommended to obtain a large reaction rate.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
