Thomas Albert Johnson
Air Products & Chemicals
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Publication
Featured researches published by Thomas Albert Johnson.
Journal of Molecular Catalysis | 1990
M. Deeba; Michael Edward Ford; Thomas Albert Johnson; J.E. Premecz
Abstract Hydrogen mordenite and dealuminated hydrogen mordenites catalyze the reaction of ethanolamine with ammonia to form ethylenediamine at low pressure. Selectivity to ethylenediamine depends on the degree of mordenite dealumination; best results are obtained with a moderately dealuminated catalyst. Self-amination of ethanolamine leads to N-(aminoethylethanolamine, the major byproduct.
Studies in Surface Science and Catalysis | 1988
Michel Deeba; Michael Edward Ford; Thomas Albert Johnson
Abstract Direct addition of ammonia to olefins is catalyzed by acidic zeolites such as H-offretite, H-clinoptilolite, H-Y, and rare earth-exchanged Y. Selectivity to the corresponding amines is high (at least 97%). Conversions are controlled by temperature-dependent equilibria between the starting materials and product amines. Olefin ami nation occurs via Markownikoff addition. Reaction is believed to involve a carbocationic intermediate which is formed by interaction of the olefin with a surface proton or ammonium ion. Catalyst activity is proportional to the total number of strongly acidic sites as measured by ammonia chemisorption. Highest activities are obtained with small to medium pore acidic zeolites, such as H-clinoptilolite, H-erionite, and H-offretite.
Journal of The Chemical Society, Chemical Communications | 1987
Michel Deeba; Michael Edward Ford; Thomas Albert Johnson
Formation of ethylamine by addition of ammonia to ethylene is catalysed by acidic zeolites such as H-Y, H-mordenite, and H-erionite.
Studies in Surface Science and Catalysis | 1993
Kathryn Sue Hayes; Thomas Albert Johnson
Abstract A process for coproduction of mono- and diaminoalkylated glycols has been developed which involves Michael addition of excess diethylene glycol to acrylonitrile followed by catalytic hydrogenation of the nitrile mixture over a chromium-promoted sponge cobalt catalyst.
Archive | 1998
Thomas Albert Johnson
Archive | 1984
Thomas Albert Johnson; Michael Edward Ford
Archive | 1980
Michael Edward Ford; Thomas Albert Johnson
Archive | 1984
Michael Edward Ford; Thomas Albert Johnson
Archive | 1981
Michael Edward Ford; Thomas Albert Johnson
Archive | 1980
Michael Edward Ford; Thomas Albert Johnson