Abstract: An alkylation process system uses an ionic liquid as a catalyst which undergoes an interruption in normal operating condition. A method of maintaining the alkylation process system during the interruption of the normal operating condition requires maintaining a circulation of the ionic liquid through the alkylation process system without interruption.

Abstract: Methods and apparatuses are provided for producing hydrocarbons. A method includes contacting an aromatic rich feed stream including diolefins with a catalyst in the presence of hydrogen to react the diolefins with the hydrogen to produce mono-olefins. A deposit forms on the catalyst during reaction. The deposit is removed from the catalyst with a solvent, where the solvent includes about 50 mass percent or more aromatic compounds.

Abstract: Processes for preparing alkylation aromatic compounds are provided herein. In an embodiment, a process for preparing alkylated aromatic compounds includes reacting an aromatic compound and an olefin in a first alkylation reaction in the presence of a first alkylation catalyst to produce a first effluent that includes an alkylated aromatic compound and unreacted aromatic compound. Unreacted aromatic compound from the first effluent and additional olefin are reacted in at least one downstream alkylation reaction in the presence of a second alkylation catalyst to produce a second effluent including the alkylated aromatic compound. A recycle stream including the alkylated aromatic compound is recycled from the second effluent to the at least one downstream alkylation reaction and, optionally, the first alkylation reaction. A ratio of the recycle stream to a total mass flow is greater in the at least one downstream alkylation reaction than in the first alkylation reaction.

Abstract: Processes for preparing alkylation aromatic compounds are provided. One process for preparing alkylated aromatic compounds includes reacting an aromatic compound and an olefin in at least one primary alkylation reaction in the presence of a first alkylation catalyst to produce a first effluent. The first effluent is split into a first product-rich stream and a first recycle stream, and the first recycle stream is recycled to the at least one primary alkylation reaction. Unreacted aromatic compound from the first product-rich stream and an additional olefin are reacted in at least one downstream alkylation reaction in the presence of a second alkylation catalyst to produce a second effluent. The second effluent is split into a second product-rich stream and a second recycle stream, and the second recycle stream is recycled to the at least one primary alkylation reaction and, optionally, to the at least one downstream alkylation reaction.

Abstract: Processes for preparing alkylation aromatic compounds are provided herein. In an embodiment, a process for preparing alkylated aromatic compounds includes reacting an aromatic compound and an olefin in a first alkylation reaction in the presence of a first alkylation catalyst to produce a first effluent that includes an alkylated aromatic compound and unreacted aromatic compound. Unreacted aromatic compound from the first effluent and additional olefin are reacted in at least one downstream alkylation reaction in the presence of a second alkylation catalyst to produce a second effluent including the alkylated aromatic compound. A recycle stream including the alkylated aromatic compound is recycled from the second effluent to the at least one downstream alkylation reaction and, optionally, the first alkylation reaction. A ratio of the recycle stream to a total mass flow is greater in the at least one downstream alkylation reaction than in the first alkylation reaction.

Abstract: Processes for preparing alkylation aromatic compounds are provided. One process for preparing alkylated aromatic compounds includes reacting an aromatic compound and an olefin in at least one primary alkylation reaction in the presence of a first alkylation catalyst to produce a first effluent. The first effluent is split into a first product-rich stream and a first recycle stream, and the first recycle stream is recycled to the at least one primary alkylation reaction. Unreacted aromatic compound from the first product-rich stream and an additional olefin are reacted in at least one downstream alkylation reaction in the presence of a second alkylation catalyst to produce a second effluent. The second effluent is split into a second product-rich stream and a second recycle stream, and the second recycle stream is recycled to the at least one primary alkylation reaction and, optionally, to the at least one downstream alkylation reaction.