Method for altering an operation of an alkylation unit
AssigneeUop LLC
InventorDale James Shields
Life of this patent
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Abstract
One exemplary embodiment can be a method for altering an operation of an alkylation unit during a process upset. The method may include blocking an outlet of a settler to a separation zone, and recycling at least a portion of a hydrocarbon stream to the separation zone to prevent an uncontrolled pressure rise in one or more distillation columns during shutdown of an alkylation reactor.
Claims20
A method for altering an operation of an alkylation unit during a process upset, comprising:
- A) blocking an outlet of a settler to a separation zone during a process upset;
- and
- B) recycling at least a portion of a hydrocarbon side stream to the separation zone to prevent an uncontrolled pressure rise in one or more distillation columns during shutdown of an alkylation reactor, wherein the recycling occurs in response to blocking of the outlet of the settler to the separation zone.
A method for altering an operation of a hydrogen fluoride alkylation unit during a process upset, comprising:
- A) recycling at least a portion of an isoparaffin stream taken above feed point to a separation zone comprising at least one distillation column to prevent an uncontrolled pressure rise in that column during shutdown of an alkylation reactor and blocking an outlet of a settler, wherein the recycling occurs in response to blocking of the outlet of the settler during the shutdown.
A method for altering an operation of a hydrogen fluoride alkylation unit during a process upset, comprising:
- A) blocking an outlet of a settler to a separation zone during a process upset;
- B) recycling an isobutane stream to the separation zone to prevent an uncontrolled pressure rise in one or more distillation columns during shutdown of the alkylation reactor;
- and
- C) blocking an olefin stream to an inlet of the alkylation reactor wherein the recycling occurs in response to blocking of the outlet of the settler to the separation zone.
Dependencies are inferred from the claim text.