Patent ID: 8742191

Claim:
A process for transalkylation of polyalkylated aromatic components, comprising: providing a transalkylation reaction zone containing a transalkylation catalyst; introducing a feedstock comprising a polyalkylated aromatic component derived from an aromatic substrate into an inlet of the transalkylation reaction zone and into contact with the transalkylation catalyst; supplying another aromatic substrate stream containing an aromatic substrate and an amount of nitrogen containing compounds selected from the group consisting of methylamine, dimethylamine, ethylamine, trimethylamine, or combinations thereof to the transalkylation reaction zone; operating the transalkylation reaction zone at temperature and pressure conditions sufficient to cause disproportionation of the polyalkylated aromatic component to produce a disproportionation product having a reduced polyalkylated aromatic content and an enhanced monoalkylated aromatic content; withdrawing the disproportionation product from the transalkylation reaction zone; wherein amounts of nitrogen containing compounds in the said stream are monitored in a range of from 15 to 35 wppm by dry colorimetry; wherein monitoring the amounts of nitrogen containing compounds comprises: vaporizing a sample of the aromatic substrate stream or obtaining a sample of the aromatic substrate stream that is in the gaseous phase; and sending the sample through a porous substrate carrying a reagent that changes color in proportion with the amount of nitrogen containing compounds.