Abstract
γ-Butyrolactone (GBL) is produced by a two-stage hydrogenation of maleic anhydride (MAH) in the liquid phase : a hydrogenation of MAH to succinic anhydride (SAH) in the first stage and a subsequent hydrogenation of SAH to GBL in the second stage. A novel ruthenium catalyst system consisting of Ru salts, trialkylphosphine and p-toluenesulfonic acid (p-TsOH) was found very effective for the hydrogenation of SAH affording GBL in selectivities not less than 95%. Acid promoters like p-TsOH induce structural change in the Ru complexes, leading to the cationic complexes, which show higher catalytic activity and selectivity than the neutral ones. A new process to produce GBL was also developed, in which the features are external preparation of Ru complexes, the reaction protocol which combine over-flow reaction with stripping and the catalyst recovery system by the extraction.
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.
