Abstract:
HYDROCARBON CONVERSION CATALYSTS HAVING MARKEDLY IMPROVED CHARACTERISTICS ARE PREPARED FROM INTIMATE ADMIXTURES OF FORAMINOUS ALUMINA-CONTAINING REFRACTORY OXIDES AND ION EXCHANGEABLE CRYSTALLINE ALUMINOSILICATE ZEOLITES BY IMPREGNATION WITH A STRONG ACIDIC SOLUTION CONTAINING GROUP VIII AND GROUP VI METAL COMPOUNDS AND AN ACID OF PHOSPHORUS AT A PH BELOW 3, TO SUBSTANTIALLY DESTROY THE ZEOLITE CRYSTALLINITY.
Abstract:
Midbarrel fuels boiling primarily between about 300* and about 700*F are selectively produced from higher boiling feeds containing less than 10 ppm nitrogen by hydrocracking in the presence of controlled amounts of added nitrogen compounds including ammonia or hydrocarbon amines in amounts corresponding to about 5 to about 100 ppm nitrogen. Furthermore, the relative distribution of midbarrel and lower boiling products can be controlled by controlling the amount of nitrogen compounds added to the hydrocracking zone.
Abstract:
LIGHT GASOLINE FRACTIONS RICH IN N-HEXANE AND OPTIONALLY N-PENTANE, AND WHICH ALSO CONTAIN SMALL AMOUNTS OF BENZENE, ARE FIRST SUBJECTED TO HYDROGENTATION IN CONTACT WITH CERTAIN ZEOLITE-BASED PLATINUM-GROUP METAL CATALYST TO EFFECT SATURATION OF THE BENZENE CONTENT, AND TOTAL EFFLUENT FROM THE HYDROGENATION ZONE IS THEM SUBJECTED TO ISOMERIZATION IN CONTACT WITH A PLATINUM GROUP METAL SUPPORTED ON AN ALUMINA-CONTAINING BASE TO EFFECT ISOMERIZATION OF NORMAL PARAFFINS TO ISO-PARAFFINS. THE ISOMERIZATION CATALYST IS MAINTAINED IN AN ACTIVE STATE BY MAINTAINED A SMALL PROPORTION OF HYDROGEN CHLORIDE IN THE RECYCLE GAS.
Abstract:
A MINERAL OIL FEEDSTOCK HAVING AN API GRAVIITY BETWEEN -5* AND 20*, LESS THAN 20 WT. PERCENT BOILING BELOW 600* F., AT LEAST 20 WT. PERCENT BOILING ABOVE 80*F. AND CONTAINING CONDENSED POLYAROMATIC, SULFUR AND NITROGEN COMPOUNDS IS INITIALLY SUBJECTED TO CATALYTIC HYDROFINING FOLLOWED BY HYDROCRACKING AT HIGH PRESSURES WITH A GROUP VI-B AND/OR GROUP VIII METAL PROMOTED, CRYYSTALLINR ZEOLITE CATALYST. THE HYDROCRACKING CONDITIONS ARE CHOSEN TO ACHIEVE 2-20% INCREASE IN HYDROGEN CONTENT OF THE 600* F.+ FRACTIION AND NOT MORE THAN 20 WT. PERCENT CONVERSION OF THE 800* F.+ FRACTIION TO LOWER-BOILING HYDROCARBONS. GASOLINE IS RECOVERED AS PRODUCT WHILE SUBJECTING THE HYDROCRACKED PRODUCT BOILING ABOVE 400* F. TO CATALYTIC CRACKING TO RECOVER A CRACKED GASOLINE PRODUCT, A CYCLE OIL AND HEAVY BOTTOMS, SAID BOTTOMS BEING RECYCLED TO THE HYDROFINING REACTION.