Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1996-11-20
1999-11-30
Dunn, Thomas
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
20812001, 502 63, 502 64, 502 68, 502 72, 502 79, C10G 1105
Patent
active
059936452
ABSTRACT:
A calcined cracking catalyst comprising zeolite crystals in an inorganic oxide matrix and containing less than about 0.75% Na.sub.2 O and, from 0.1 to 10% P expressed as P.sub.2 O.sub.5, the cracking catalyst being further characterized by exhibiting a spectra with a peak at about 3735 cm.sup.-1 when treated with pyridine and analyzed by FTIR. A process for manufacturing an FCC catalyst characterized by high tolerance to contaminated metals comprises providing fluid cracking catalyst microspheres containing zeolite Y in an inorganic oxide matrix and analyzing 20 to 60% by weight Al.sub.2 O.sub.3 and analyzing less than 0.75% wt. Na.sub.2 O; impregnating the catalyst with a solution of a phosphate or phosphite salt in amount such the microspheres analyze 0.5 to 10% by weight P.sub.2 O.sub.5 and calcining the microspheres in the absence of steam at a temperature above 1300.degree. F. and below 1600.degree. F. and recovering the product characterized exhibiting a spectra with a peak at about 3687 cm.sup.-1 and the intensity ratio of the peak at 3687 cm-.sup.1 to the peak at 3675 cm-.sup.1 is greater than about 0.8 when treated with pyridine and analyzed by FTIR.
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Macaoay John M.
Madon Rostam J.
Dunn Thomas
Engelhard Corporation
Keller Raymond F.
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