Disclosed is a process and apparatus for removing nitrogen compounds from
an alkylation substrate such as benzene. A conventional adsorbent bed can be used
to adsorb basic organic nitrogen compounds and a hot adsorbent bed of acidic molecular
sieve can adsorb the weakly basic nitrogen compounds such as nitrites. Water facilitates
the adsorption of the weakly basic nitrogen compounds. Running an alkylation substrate
stream from a fractionation column of elevated temperature and suitable water concentration
to the hot adsorbent bed may be advantageous.
