Catalytic cracking catalyst and process

Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking

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502 63, 502 64, 502 68, 502 69, 502 25, 502 79, 502340, 208108, 208118, C10G 1114

Patent

active

049293389

ABSTRACT:
Catalytic cracking catalysts which contain a basic alkaline earth metal component in amounts greater than 5 percent by weight (expressed as the oxides) are used to crack hydrocarbon feedstocks that contain substantial quantities of metals such as vanadium, nickel, copper and iron. In a particularly preferred embodiment natural or synthetic particulate magnesium oxide (MgO) containing composites such as dolomite or a formed particulate coprecipitated magnesia-silica cogel (MgO.SiO.sub.2) having a substantial intra-particle pore volume in pores ranging from about 200-10,000 .ANG. in diameter and an average pore diameter greater than about 400 .ANG. in the 200-10,000 .ANG. diameter range is mixed with a zeolite containing fluid cracking catalyst (FCC) either as an integral component of the catalyst particle or as a separate additive.

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