Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component
Patent
1985-11-26
1988-08-30
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And additional al or si containing component
502 64, B01J 2910, B01J 2916
Patent
active
047677341
ABSTRACT:
A hydrocarbon conversion catalyst useful for converting hydrocarbon feeds to midbarrel products is prepared by calcining a crystalline aluminosilicate zeolite having cracking activity in the presence of added steam at a water vapor partial pressure greater than about 2.0 p.s.i.a. under conditions such that the unit cell size of the zeolite is reduced to a value between about 24.32 and about 25.45 Angstroms while the water vapor sorptive capacity of the zeolite is decreased to a value between about 5 and about 15 weight percent of the zeolite at 25.degree. C. and a p/p.degree. value of 0.10. The moderately stream calcined zeolite is mixed with a porous, inorganic refractory oxide component and the resultant mixture is extruded to form particles which are broken into extrudates normally ranging in length between 1/16 and 1/2 inch. The extruded particles are then calcined in the presence of added steam at a water vapor partial pressure greater than about 2.0 p.s.i.a. The calcination of the extrudates is carried out in the presence of sufficient added steam for a sufficient amount of time at a sufficient temperature to convert the moderately steam calcined zeolite in the extrudates into an ultrahydrodphobic zeolite having a unit cell size between about 24.20 and about 24.32 Angstroms and a sorptive capacity for water vapor less than about 5 weight percent of the zeolite at 25.degree. C., and a p/p.degree. value of 0.10.
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Dees Carl F.
Finkle Yale S.
Sandford Dean
Union Oil Company of California
Wirzbicki Gregory F.
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