Back to results
US 7,744,828 B2Granted
Process and apparatus for the removal of nitrogen compounds from a fluid stream
AssigneeUop LLC
InventorsRobert J. Schmidt, Andrew S. Zarchy
Life of this patent
Estimating the term…
Abstract
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.
Claims14
An alkylation system comprising:
- an impurity adsorption vessel comprising:
- a clay or a resin adsorbent selective for the adsorption of impurities;
- an alkylation substrate feed inlet;
- and
- a purified alkylation substrate feed outlet;
- a nitrogen adsorption vessel comprising:
- a denitrogenating adsorbent comprising a molecular sieve selective for the adsorption of a nitrogen compound;
- an inlet for a purified substrate feed, said inlet in downstream communication with said purified alkylation substrate feed outlet;
- water, having a concentration between about 20 wppm to about 500 wppm of the purified substrate feed, and
- a denitrogenated alkylation substrate feed outlet;
- and
- at least one aromatic alkylation reactor vessel comprising:
- an aromatic alkylation catalyst for alkylating an alkylation agent and an aromatic alkylation substrate under alkylation conditions;
- at least one alkylation reactor inlet in downstream communication with said denitrogenated alkylation substrate feed outlet;
- and
- an alkylation reactor outlet.
13 more elements
Dependencies are inferred from the claim text.