Patent ID: 9174891
Filing Date: 2015-11-03
Classification: C07C

Abstract:
1. A process for the formation of an alkylaryl compound, comprising: passing an aromatic compound to an alkylation zone, wherein the alkylation zone comprises at least two alkylation beds, a first alkylation bed and a second alkylation bed, and the aromatic compound is passed to the first alkylation bed; splitting a feedstream comprising olefins and paraffins into at least a first portion and a second portion; passing a feedstream the first portion comprising olefins and paraffins to the first alkylation bed, to generate a first intermediate process stream comprising alkylaryl compounds; passing the first intermediate process stream and the second portion to the second alkylation bed to generate a first process stream; adding additional paraffins comprising paraffins having a different carbon number and different carbon number range from the olefins to the alkylation zone to bring the paraffin content to at least 70% by weight of the feedstream; passing the first process stream to first fractionation unit to generate a first fractionation stream comprising a low purity aromatics stream from a side stream from the rectification section of the first fractionation unit, a first bottoms stream comprising alkylaryl compounds; and an overhead stream comprising high purity aromatics stream; passing the bottoms stream to a second fractionation unit to generate a second overhead comprising paraffins, and a second bottoms stream comprising alkylaryl compounds; passing the first fractionation stream to the alkylation zone; passing a portion of the second overhead stream to the alkylation zone; passing the high purity aromatics stream to an alkylation reactor in regeneration mode, thereby creating a regeneration effluent stream; splitting the regeneration effluent stream into a first portion and a second portion; passing the first portion to the first fractionation column; passing the second portion to a transalkylation reactor; passing the second bottoms stream from the second fractionation column to an LAB column to generate an LAB overhead stream comprising LABs, and an LAB bottoms stream comprising heavies; passing a portion of the LAB bottoms stream to the transalkylation reactor to create a transalkylation effluent stream comprising mono-alkylaromatic compounds; and passing the transalkylation effluent stream to the first fractionation unit.