Abstract
Amination of alcohols over Brønsted acidic molecular sieves such as H-mordenites proceeds via a bimolecular precursor consisting of an ammonium ion and an alcohol molecule. The rate of transformation of that complex into a sorbed alkyl ammonium ion is fast. Desorption of the formed amines, however, is difficult under reaction conditions (633K) and only proceeds in the presence of excess ammonia. Two mechanisms are proposed for the release of the alkylamines in the gasphase, i.e., adsorption assisted desorption and alkyl scavenging by ammonia. The vast majority of the alkylamines are formed by scavenging alkyl groups of chemisorbed alkyl ammonium ions by ammonia. A linear relation of the initial rate of monomethylamine formation and the total surface concentration of methyl groups (present as mono-up to tetramethylammonium ions) inside the pores of the mordenites was found.
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.
