methods for removing impurities from a hydrocarbon stream and their use in aromatic alkylation processes

摘要

the present invention relates to methods for removing impurities from a hydrocarbon stream using a protective bed material. the protective bed material includes compositions comprising a zeolite and a support or mesoporous binder. zeolite has a restriction index less than 3. the support or meiosporous binder comprises a mesoporous metal oxide that has a particle diameter greater than or equal to 20 µm at 50% of the cumulative pore size distribution (d50), a pore volume less than 1 cm³ / g and an alumina content greater than 75% by weight. processes for producing monoalkylated aromatic compounds (e.g., ethylbenzene or cumene) are also described with the use of impure feed streams that are treated by the methods described to remove impurities that act as catalyst poisons for downstream alkylation and / or transalkylation catalysts .