Catalytic improvement of hydrocarbon synthesis product

Claim 1

THE METHOD OF IMPROVING THE QUALITY OF A SYNTHETIC NORMALLY LIQUID HYDROCARBON PRODUCT FORMED BY REACTING CARBON MONOXIDE AND HYDROGEN IN THE PRESENCE OF A SYNTHESIS CATALYST, THE MAJOR PORTION OF WHICH BOILS IN THE GASOLINE-BOILING RANGE AND CONTAINS OXYGENATED COMPOUNDS AND LARGE AMOUNTS OF ALPHA OLEFINS WHICH COMPRISES SUBJECTING THE SAID PRODUCT IN A REACTION ZONE TO THE INFLUENCE OF HEAT IN THE PRESENCE OF A SPENT AND CONTAMINATED CRACKING CATALYST CONTAINING SILICA AND ALUMINA THAT HAS BECOME DEACTIVATED IN THE CRACKING OF LIQUID HYDROCARBONS SO THAT IT HAS A D+L VALUE OF NOT SUBSTANTIALLY ABOVE 20 DURING A RELATIVELY SHORT CONTACT TIME CORRESPONDING TO A SPACE VELOCITY OF APPROXIMATELY 2-5 VOLUMES OF COLD OIL PER VOLUME OF CATALYST CALCULATED ON A FIXED BED BASIS AT TEMPERATURES OF FROM ABOUT 800* F. TO ABOUT 975* F., THE SPACE VELOCITY BEING THE HIGHER THE HIGHER THE TEMPERATURE WITHIN THE RANGE SPECIFICED, AND VICE VERSA.

Claim 2

THE METHOD OF IMPROVING THE QUALITY OF A SYNTHETIC NORMALLY LIQUID HYDROCARBON PRODUCT FORMED BY REACTING CARBON MONOXIDE AND HYDROGEN IN THE PRESENCE OF A SYNTHESIS CATALYST, THE MAJOR PORTION OF WHICH BOILS IN THE GASOLINE-BOILING RANGE AND CONTAINS OXYGENATED COMPOUNDS AND LARGE AMOUNTS OF ALPHA OLEFINS WHICH COMPRISES SUBJECTING THE SAID PRODUCT IN A REACTION ZONE TO THE INFLUENCE OF HEAT IN THE PRESENCE OF A SPENT AND CONTAMINATED CRACKING CATALYST CONTAINING SILICA AND ALUMINA THAT HAS BECOME DEACTIVATED IN THE CRACKING OF LIQUID HYDROCARBONS SO THAT IT HAS A D+L VALUE OF NOT SUBSTANTIALLY ABOVE 20 DURING A RELATIVELY SHORT CONTACT TIME CORRESPONDING TO A SPACE VELOCITY OF APPROXIMATELY 2-5 VOLUMES OF COLD OIL PER VOLUME OF CATALYST CALCULATED ON A FIXED BED BASIS AT TEMPERATURES OF FROM ABOUT 800* F. TO ABOUT 975* F., THE SPACE VELOCITY BEING THE HIGHER THE HIGHER THE TEMPERATURE WITHIN THE RANGE SPECIFICED, AND VICE VERSA.