Patent ID: 8350106

Claim:
A method for treating a hydrogenation feed stream comprising one or more aromatic compounds, one or more nitrogen compounds, and one or more unsaturated aliphatic hydrocarbons, the method comprising contacting the hydrogenation feed stream with a hydrogenation catalyst to selectively hydrogenate the unsaturated aliphatic hydrocarbons thereby generating a hydrogenation effluent; and contacting the hydrogenation effluent with a zeolitic guard bed to remove at least a portion of the one or more nitrogen compounds, wherein the hydrogenation feed stream comprises benzene, the one or more unsaturated aliphatic hydrocarbons are diolefins present in an amount ranging from about 100 to about 2000 ppm by weight, and contacting of the hydrogenation feed stream with the hydrogenation catalyst provides a hydrogenation effluent stream in which at least about 80% of the diolefins in the hydrogenation feed stream are hydrogenated and at least about 90% of the benzene in the hydrogenation feed stream is unconverted.