Patent ID: 6894201

Claim:
A process for alkylating an alkylation substrate with an alkylation agent, said process comprising: passing an alkylation substrate feed stream comprising an alkylation substrate and a nitrogen-containing compound to a separation zone; recovering from the separation zone a contaminated substrate stream comprising the alkylation substrate and the nitrogen-containing compound; passing at least a portion of a stream containing the alkylation substrate to an impurity adsorption zone containing an adsorbent selective for the adsorption of impurities comprising basic organic nitrogen compounds; passing at least a portion of the contaminated substrate stream to a nitrogen adsorption zone containing an adsorbent selective for the adsorption of the nitrogen compound, and recovering from the adsorption zone a denitrogenated substrate stream comprising the alkylation substrate and having a concentration of the nitrogen-containing compound that is less than the concentration of the nitrogen-containing compound in the contaminated substrate stream; and passing an alkylation agent and at least a portion of the denitrogenated substrate stream comprising the alkylation substrate to an alkylation reaction zone separate from the nitrogen adsorption zone, alkylating the alkylation substrate with the alkylation agent over an alkylation catalyst to produce alkylate, and recovering from the alkylation reaction zone the reaction effluent stream comprising the alkylate.