Sulfur-type changes during the hydrocracking of Athabasca bitumen. I. Naphtha fraction up to 200/sup 0/C

Conference · Wed Feb 01 04:00:00 EST 1978 · Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States)

OSTI ID:6869301

George, A E; Pruden, B B; Sawatzky, H

The effects of hydrocracking on the sulfur content of Athabasca bitumen were investigated. It was found that although the percentage sulfur content decreases in all the liquid fractions and asphaltenes of the bitumen, when the severity of hydrocracking is increased, the amount of sulfur present in the naphtha fraction increases steadily because of the increase of this fraction in the product. The main sulfur compound-types in the naphtha product are residual sulfur, aliphatic sulfides, and aromatic sulfides, in descending order. These sulfur groups show the same trend as the total sulfur on increasing the severity of hydrocracking, except in the most severely-treated product where the aliphatic sulfides remain constant. The catalytic product has a higher mercaptan content and lower concentration of residual sulfur, aliphatic sulfides, and aromatic sulfides than the non-catalytically-cracked product at nearly the same pitch conversion. This suggests that the formation of mercaptans could be an intermediate step in the desulfurization process. A modification for the procedure of potentiometric titration of sulfides, in hydrocracked products that have a high olefinic content, is described.

• Research Organization: Dept. of Energy, Mines and Resources, Ottawa
• OSTI ID: 6869301
• Report Number(s): CONF-770814-P2; CONF-780305-P2
• Conference Information: Journal Name: Prepr., Div. Pet. Chem., Am. Chem. Soc.; (United States) Journal Volume: 23:1
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040403* -- Oil Shales & Tar Sands-- Refining
AROMATICS
ASPHALTENES
ASPHALTS
ATHABASCA DEPOSIT
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL TAR OILS
CRACKING
DECOMPOSITION
DESULFURIZATION
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
HYDROCRACKING
NAPHTHA
NONMETALS
OIL SAND DEPOSITS
OIL SANDS
OILS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PYROLYSIS
QUANTITY RATIO
SULFIDES
SULFUR
SULFUR COMPOUNDS
TAR
THERMOCHEMICAL PROCESSES
THIOLS