Multifunctional additive for maximizing properties relevant to the process of fluid catalytic cracking and the process for preparation thereof
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United States of America Patent
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Nov 24, 2009
Grant Date -
Feb 8, 2007
app pub date -
Aug 2, 2006
filing date -
Aug 4, 2005
priority date (Note) -
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Abstract
A multifunctional additive for maximizing yield of light olefins and LPG, with a tolerance to contaminant metals. Maximization of the referenced properties is accomplished through the use of a zeolite treated with a phosphorus source, calcined and impregnated with a rare earth salt. The process for preparation of the referenced catalyst includes the following steps: preparation of a precursor containing a zeolite that is selective of olefins with a source of phosphorus; placement of a source of phosphorus in this precursor through calcination; deposition of rare earth salts on the surface of the additive for maximizing the yield of light olefins and LPG that forms; and drying the multifunctional additive formed.
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