Patent
A reactive distillation alkylation process including in situ catalyst regeneration
Barry J. Winder,Wharry Donald L,Schell John R,Brown Mary J,Murray Joy L,Howe Richard C,Sorenson Wayne L,Szura Daniel P,Gates Frank +8 more
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TLDR
In this paper, a unified process which couples a unique in-situ catalyst regeneration process with a continuous reactive distillation under pressure for the alkylation of light aromatic hydrocarbons such as benzene with C2-C30 olefins using a solid acid catalyst supported in the reflux zone (21) of a distillation column (section A).Abstract:
A unified process which couples a unique in-situ catalyst regeneration process with a continuous reactive distillation under pressure for the alkylation of light aromatic hydrocarbons such as benzene with C2-C30 olefins using a solid acid alkylation catalyst supported in the reflux zone (21) of a distillation column (section A). Periodic regeneration of the catalyst (sections E, F and G) is carried out with a countercurrent injection of a C4-C16 paraffin (35) below the benzene rectification zone at the top of the column, but above the catalyst zone while the aromatic hydrocarbon reaction feedstock (17) is injected continuously at a point above a rectification zone at the base of the column where the aromatic compound is separated from the paraffin and by-products washed from the catalyst. The use of the C4-C16 paraffin with the aromatic at a mole fraction in the range of 40 to 90% enables a regeneration temperature of about 175 - 250°C. to be achieved and maintained by adjusting the column pressure and aromatic reflux rate. Significantly lower pressures, on the order of 125 to 370 psig, are required to achieve regeneration temperature than would be otherwise required with the use only of the aromatic hydrocarbon to dilute and wash the by-products from the catalyst surfaces.read more
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Patent
Liquid phase aromatics alkylation process
TL;DR: In this paper, a process for the production of high octane number gasoline from light refinery olefins and benzene-containing aromatic streams such as reformate is described.
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Patent
Alkylation of organic aromatic compounds
TL;DR: In this paper, the aging rate of the catalyst in a process for concurrent alkylation of aromatic with olefin and distillation of reaction components (reactants and products) in a distillation column reactor in a catalyst bed wherein the catalyst also serves as the distillation structure, is retarded by limiting the conversion of olelin in the catalyst bed to about 90 percent.
Patent
Alkylation of aromatics-containing refinery streams
C. Richard Hsieh,A. John Gloyn +1 more
TL;DR: In this paper, a process for reducing the concentration of light aromatics, especially benzene, in a refinery stream by catalytic alkylation using an olefin-containing stream in a distillation column is described.
Patent
Process and system for alkylation of aromatic compounds
TL;DR: In this paper, a reactive distillation process and system for the alkylation of liquid aromatic compounds with a liquid olefin or Olefin/paraffin mixture is described.
Patent
Alkylation of aromatic hydrocarbons in a fixed bed catalytic process
TL;DR: In this paper, a process for the alkylation of benzene (in general, aromatic hydrocarbons), with C 2 -C 20 monoolefins in the presence of an aluminum-magnesium silicate catalyst, to give linear alkylbenzenes of detergent range is described.
Patent
Method for regenerating certain acidic hydrocarbon conversion catalysts by solvent extraction.
TL;DR: In this article, a process for the regeneration of solid acidic hydrocarbon conversion catalysts, but particularly certain transition aluminas and zeolites promoted with Lewis acids (preferably BF3), is described.
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