The effect of metalloporphyrins on asphalt oxidation. The effect of vanadyl chelates found in petroleum

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Liq. Fuels Technol.; (United States)

DOI:https://doi.org/10.1080/07377268408915338· OSTI ID:6291252

Branthaver, J F; Dorrence, S M; Nazir, M; Petersen, J C; Ryan, M J

Four selected asphalts were blended with zero to five wt. percent of fractions rich in vanadyl chelates prepared from two crude oils. The mixture was coated on a teflon support, and the whole was heated in an oven at 130 + or - 2/sup 0/C for 24 hours. The mixture then was analyzed for increases in ketone, acid, and anhydride functions. In general, fractions rich in vanadyl porphyrins tended to promote asphalt oxidation, particularly as measured by increase in ketones. Correlation of vanadyl porphyrin concentration with asphalt oxidation is observed to be direct only if asphalts are mixed with varying amounts of the same fraction derived from the same crude. Possible reasons for this phenomenon are discussed in terms of oxidation susceptibility of asphalts, the importance of molecular associations, and the relative catalytic activities of metalloporphyrins and other metal chelates. Nonporphyrin vanadium chelates appear to be ineffective promoters of asphalt oxidation compared with vanadyl porphyrins. This may be due to the manner in which nonporphyrin vanadium complexes are associated in asphalt molecular agglomerations, or to inherent inactivity.

• Research Organization: Western Research Institute, Laramie, WY
• OSTI ID: 6291252
• Journal Information: Liq. Fuels Technol.; (United States), Journal Name: Liq. Fuels Technol.; (United States) Vol. 2:1; ISSN LFTED
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
023000* -- Petroleum-- Properties & Composition
ANHYDRIDES
ASPHALTS
BITUMENS
CARBOXYLIC ACIDS
CATALYTIC EFFECTS
CHELATES
CHEMICAL REACTIONS
COMPLEXES
ELEMENTS
ENERGY SOURCES
FLUORINATED ALIPHATIC HYDROCARBONS
FOSSIL FUELS
FUELS
HALOGENATED ALIPHATIC HYDROCARBONS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
KETONES
MATERIALS
METALS
MOLECULAR STRUCTURE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXIDATION
PETROCHEMICALS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
PORPHYRINS
SYNTHETIC MATERIALS
TAR
TEFLON
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS