Production of high octane gasoline

Patent · Tue Apr 24 04:00:00 EDT 1990

OSTI ID:6571946

Fischer, R H; LaPierre, R B; Owens, P J; Varghese, P

This patent describes a process for the production of a high octane gasoline, having an octane number not less than 87 (RON + 0), from a substantially dealkylated hydrocarbon feedstock comprising not less than 50 vol % aromatic content, an API gravity between 5 and 25, a nitrogen content between 50 and 650 ppm, and a hydrogen content between 8.9 and 12.5 wt %. It comprises: hydrotreating the substantially dealkylated feedstock in the presence of a hydrotreating catalyst comprising a hydrogenation/dehydrogenation metal on a support, under hydrotreating conditions, including a pressure not greater than 1200 psig, liquid hourly space velocity between 0.25 and 5, and temperature between 600{degrees} and 800{degrees} F.; contacting the hydrotreated substantially dealkylated feedstock with a catalyst comprising a silica matrix and a crystalline silicate zeolite having a Constraint Index less than 2. The contacting is conducted at hydrogen partial pressure between 600 and 1000 psi, temperatures not less than 700{degrees} F., LHSV between 0.25 and 2.5, and a conversion per pass to 385{degrees} F. end point gasoline no greater than 50% to form a product comprising a 385{degrees} F. end point gasoline and an unconverted, upgraded bottom fraction; and passing the unconverted, upgraded bottom fraction to a fluid catalytic cracking (FCC) unit for further processing.

• Assignee: Mobil Oil Corp., New York, NY (USA)
• Patent Number(s): US 4919789; A
• Application Number: PPN: US s 7-259211
• OSTI ID: 6571946
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ANTIKNOCK RATINGS
API GRAVITY
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DENSITY
FUELS
GASOLINE
HYDROCRACKING
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PRODUCTION
PYROLYSIS
THERMOCHEMICAL PROCESSES
ZEOLITES