Process for alkylation of isoparaffin with olefin
AssigneesChina Petroleum Corporation, Research Institute of Petroleum Processing, Sinopec
InventorsYigong He, Yufeng He, Wenhua Xie, Qiang Fu
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Abstract
This invention relates to a process for alkylation of an isoparaffin with an olefin over a solid-acid catalyst, wherein at least two parallel reactors are used at the same time. When the solid acid catalyst in one or more reactors need to be regenerated, the catalyst is contacted in-situ in the reactor with a solvent to wash out the macromolecular hydrocarbons deposited on the surface of the catalyst in order to resume the high selectivity of catalyst in alkylation.
Claims21
A process for alkylation of isoparaffin with olefins in at least two parallel alkylation reactors, each reactor containing solid acid catalyst having catalyst activity and catalyst selectivity to alkylates, comprising the steps of:
- continuously feeding an alkylation feedstock comprising isoparaffin and mono-olefins into at least one of said parallel alkylation reactors at alkylation conditions to produce alkylate having an octane number,
- measuring at least one value selected from the group consisting of said catalyst activity, catalyst selectivity, and said produced alkylate octane in said at least one parallel alkylation reactor, and when said measured value descends to a selected value, terminating the continuous feeding of alkylation feedstock from said at least one parallel alkylation reactor,
- continuously feeding said alkylation feedstock into said at least one of said parallel alkylation reactors at alkylation conditions after regeneration of the acid catalyst, and
- feeding said alkylation feedstock into another alkylation reactor of said at least two parallel alkylation reactors at alkylation conditions while introducing a solvent stream into the at least one of said parallel alkylation reactors to regenerate the acid catalyst.
A process for alkylation of isoparaffin with olefins in at least two parallel alkylation reactors, each reactor containing solid acid catalyst having catalyst activity and catalyst selectivity to alkylates, comprising the steps of:
- feeding an alkylation feedstock comprising isoparaffin and mono-olefins into at least one of said parallel alkylation reactors at alkylation conditions comprise supercritical reaction conditions to produce alkylate having an octane number,
- measuring at least one value selected from the group consisting of said catalyst activity, catalyst selectivity, and said produced alkylate octane in said at least one parallel alkylation reactor, and when said measured value descends to a selected value, terminating the feeding of alkylation feedstock from said at least one parallel alkylation reactor,
- feeding said alkylation feedstock into said at least one of said parallel alkylation reactors at alkylation conditions after regeneration of the acid catalyst, and
- feeding said alkylation feedstock into another alkylation reactor of said at least two parallel alkylation reactors at alkylation conditions comprise supercritical reaction conditions while introducing a solvent stream into the at least one of said parallel alkylation reactors to regenerate the acid catalyst.
Dependencies are inferred from the claim text.