METHOD FOR PREPARING COPPER-EXCHANGED TYPE Y ZEOLITE

摘要

Copper-exchanged Type Y zeolite is prepared by contacting a sodium Type Y zeolite with an aqueous copper salt solution to effect ion exchange of a portion of the sodium cations with copper cations, heating the zeolite to effect at least a partial dehydration of the zeolite, and thereafter contacting the zeolite with a mixture comprising a cuprous salt and a hydrocarbon capable of forming a soluble complex with the cuprous salt and passing the pore openings of the zeolite. The product is particularly useful in the selective separation of olefinic hydrocarbons from saturated hydrocarbons.