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US 5,113,031 AGranted
Aromatic alkylation process
OwnerAngel Syinventor
Life of this patent
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OwnerAngel Syinventor
Estimating the term…
A process for the catalytic distillation production of alkylated aromatic compounds is provided wherein the vapor pressure of the olefin may be increased while maintaining the same olefin feed rate and aromatic to olefin ratio. In one embodiment a side stream from the vapor from the second column below the catalyst and olefin feed is condensed and rerouted to the aromatic make up stream from the reflux drum. The vapor pressure of the olefin in the lower end of the first column in the catalyst bed is thus increased which increases the equilibrium concentration of the olefin in the liquid phase. In another embodiment of the invention the effective driving force for the reaction is increased by injecting the olefin at different heights within the catalyst bed. If additional olefin is injected more catalyst bed height would be required, but the additional catalyst is more that offset by the increased throughput at the same overall olefin conversion. The practice of injecting the olefin feed at different heights is especially useful when the same olefin feed rate is used but split among the several streams because less catalyst is required.
In a catalytic distillation process for the alkylation of organic aromatic compounds with olefins over a particulate acidic catalytic distillation structure comprising the steps of feeding a stream containing olefins and a stream containing organic aromatic compounds to a distillation column reactor and concurrently reacting the olefins and organic aromatic compounds and separating the resulting reaction product by fractional distillation, the improvement comprising the increasing the olefin partial pressure through out the catalyst bed while maintaining a constant olefin feed rate and maintaining a constant aromatic compound to olefin ratio, wherein the effective olefin partial pressure is increased by dividing the olefin feed into at least two separate streams and feeding said separate streams at different locations along said catalyst bed.
A process for the alkylation of organic aromatic compounds with olefins, comprising the steps of:
Dependencies are inferred from the claim text.