Process for ultra low benzene reformate using catalytic distillation
AssigneeCatalytic Distillation Technologies
InventorsMontri Vichailak, Purvis K. Ho, Martinus J. Almering, Arvids Judzis, JR., Willibrord A. Groten, Lawrence A. Smith, JR., Yongqiang Xu
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Abstract
A process for reducing the concentration of benzene in a hydrocarbon stream, the process including: fractionating a reformate to form a benzene concentrate fraction comprising benzene and other C6 hydrocarbons, and a heavies fraction comprising C7+ hydrocarbons; and hydrogenating the benzene concentrate fraction to form a hydrocarbon fraction having a reduced benzene concentration.
Claims26
A process for reducing the concentration of benzene in a hydrocarbon stream, the process comprising:
- fractionating a reformate to form a benzene concentrate fraction comprising benzene and other C6 hydrocarbons, and a heavies fraction comprising C7+ hydrocarbons;
- hydrogenating the benzene concentrate fraction to form a hydrocarbon fraction having a reduced benzene concentration.
A process for reducing the concentration of benzene in a hydrocarbon stream, the process comprising:
- feeding a reformate comprising benzene, components lighter than benzene, and components heavier than benzene to a first distillation column;
- fractionating the reformate to form a fraction comprising benzene and other C6 hydrocarbons, and a heavies fraction comprising C7+ hydrocarbons;
- recovering the heavies fraction from the first distillation column as a first bottoms fraction;
- withdrawing the fraction comprising benzene from the distillation column;
- feeding the fraction comprising benzene and hydrogen to a hydrogenation reactor comprising at least one reaction zone comprising a hydrogenation catalyst;
- contacting the benzene and hydrogen in the presence of the hydrogenation catalyst to convert at least a portion of the benzene to cyclohexane;
- and
- recovering a fraction having a reduced benzene concentration.
A process for reducing the concentration of benzene in a hydrocarbon stream, the process comprising:
- feeding hydrogen and a reformate comprising benzene, components lighter than benzene, and components heavier than benzene to a first catalytic distillation reactor system comprising at least one reaction zone comprising a hydrogenation catalyst;
- concurrently in the first catalytic distillation reactor system:
- contacting the benzene and hydrogen in the presence of the hydrogenation catalyst to convert at least a portion of the benzene to cyclohexane;
- and
- fractionating the reformate to form a fraction comprising unreacted benzene and other C6 hydrocarbons, and a heavies fraction comprising C7+ hydrocarbons;
- recovering the heavies fraction from the first catalytic distillation reactor system as a first bottoms fraction;
- withdrawing the fraction comprising benzene and other C6 hydrocarbons from the catalytic distillation reactor system;
- feeding hydrogen and the fraction comprising benzene and other C6 hydrocarbons to a hydrogenation reactor comprising at least one reaction zone comprising a hydrogenation catalyst;
- contacting the benzene and hydrogen in the presence of the hydrogenation catalyst to convert at least a portion of the benzene to cyclohexane;
- and
- recovering a hydrocarbon fraction having a reduced benzene concentration.
Dependencies are inferred from the claim text.