Conversion of hydrocarbon oils. [Catalytic Cracking]

Patent · Tue Oct 13 04:00:00 EDT 1942

OSTI ID:7081041

Thomas, C L

In a process for converting a hydrocarbon oil into substantial yields of relatively high antiknock gasoline, the oil is submitted to a primary fractionation step in which a substantial portion of the oil is vaporized. A relatively heavy unvaporized fraction of the oil is separated and subjected to non-catalytic cracking in a heating coil and communicating reaction chamber at a temperature and pressure adequate to effect substantial cracking. The reaction products are passed into a vaporizing zone at a reduced pressure. Then a residual fraction unsuitable for further conversion is separated, and the vaporized portion of the reaction products from the vaporizing zone is passed to primary fractionation step where the gas, gasoline, and an intermediate-boiling fraction are separated. The intermediate fraction and distillate fractions of the charging oil in vaporous form are contacted with a cracking catalyst in a catalytic cracking step under conditions adequate to effect substantial cracking thereof, and the reaction products are passed to a secondary fractionation step. The gas and gasoline are recovered, and the insufficiently converted oil recovered from the catalytic cracking step is separated into a low-boiling, an intermediate-boiling and a high-boiling fraction. The high-boiling fraction is mixed with the low-boiling fraction, and the mixture is supplied to the aforesaid vaporizing zone of the noncatalytic cracking step, and the intermdiate-boiling fraction from the secondary fractionation step is returned to the catalytic cracking step.

• Assignee: Universal Oil Products Co.
• Patent Number(s): US 2298434
• OSTI ID: 7081041
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
04 OIL SHALES AND TAR SANDS
040403* -- Oil Shales & Tar Sands-- Refining
ANTIKNOCK RATINGS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASOLINE
MINERAL OILS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM PRODUCTS
PYROLYSIS
SYNTHESIS