Catalyst for light olefins and LPG in fludized catalytic units

摘要

A catalyst composition comprising at least about 10% by weight pentasil, at least about 12% by weight Y-type zeolite at a pentasil to Y zeolite ratio of at least 0.25, and wherein the pentasil and Y zeolite comprise at least about thirty-five percent of the catalyst have been shown to optimize light olefin yields and LPG from FCC processes. Embodiments having matrix surface areas greater than 25 m2/g, phosphorous and rare earth are preferred. The compositions of this invention are particularly useful in typical fluid catalytic cracking (FCC) processes.

主权项

1. A catalyst composition comprising
a. about twelve to about sixty percent by weight Y-type zeolite; b. at least about ten percent by weight pentasil and wherein pentasil and Y-type zeolite is present in a weight ratio (pentasil:Y-type zeolite) of at least 0.25 and no more than 2.3; and c. the Y-type zeolite and pentasil comprises at least about thirty-five percent by weight of the catalyst composition; and wherein the pentasil and the Y-type zeolite are contained in separate particles, and the separate particles of Y-type zeolite comprise two to eight percent by weight rare earth (measured as rare earth oxide) based on the Y type zeolite.