| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 10.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
In a FCC process comprising admixing a hydrocarbon charge stock with a solid FCC catalyst dosed with a catalyst additive in the bottom section of a reactor riser to process at a 0.1-10 catalyst/oil ratio - Passing the mixt of the hydrocarbon charge stock & the solid catalyst through the riser - Thereby volatilizing the hydrocarbon charge stock & effecting cracking thereof under conventional FCC conditio ns to obtain gaseous prodts comprising H, 1-5C paraffins 2-5C olefins, & liquid prodts - Sepn said gaseous prodts from said liquid prodts & solid catalyst, the IMPROVEMENT allowing for enhanced 4-5C olefin yield as compared to the case of no catalyst additive & for decreased loss of gasoline yields as compared to the case of using ZSM-5 additive & comprising - Using a catalyst additive comprising a binary molecular sieve having a crystalline zeolite metallosilicate core & a shell consisting of an Al phosphate molecular sieve (AlPO4 ) said binary molecular sieve formed by the steps of - Adding a powdered form of crystalline zeolite metallosilica te into an aq slurry comprising PO4H3, pseudoboehmite alumina & tripropylamine, wherein the slurry has molar ratio Al2O3:P2O5:Tri-Pr amine of 1:1:0.5 to 1:1:5, & 20-60 moles of water per mole of Al2O3 - Mixing the slurry for 1-12 hours in a liner at room T - Sealing said slurry in an autoclave & placing said slurry in an oven at 130-170C for 12-96 hours to form said binary mo lecular sieve catalyst - Washing & drying the prodt - Calcining the prodt at 530-570C in N for 5-15 hours - Calcining prodt in air for 1-3 hours |
| PATENT PHOTOCOPY | Available on request |
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