Study of the chemical structure of petroleum asphaltenes by spectral methods

Journal Article · Tue Mar 01 04:00:00 EST 1977 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6554910

Posadov, I A; Pokonova, Yu V; Khusidman, M B; Gitlin, I G; Proskuryakov, V A

Results of nuclear magnetic resonance (NMR), ultraviolet (UV), and infrared (IR) spectroscopy studies of the chemical and supermolecular structure of asphaltene concentrates isolated from petroleum residues are reported. Considerable intensity of a characteristic series of absorption bands at 750, 810, 870, 1560, 1600, and 3030 cm/sup -1/ is interpreted as indicative of aromatic structures; while the bands at 870 and 810 cm/sup -1/ are taken as evidence of the predominant presence of highly substituted aromatic rings which are apparently included in alicyclic structures but do not form polynuclear condensed aromatic systems. The bathochromic shift of the electronic absorption spectrum in the region of 250-600 nm and the weak inflection at 300-310 nm are attributed to the partial condensation of the aromatic rings with predominance of fragments of the bi- and tricyclic types. The percentage content of various organic groups, the degree of polycondensation, the degree of potential for substitution, and the elementary composition are reported.

• OSTI ID: 6554910
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 50:3; ISSN JAPUA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL COMPOSITION
INFRARED SPECTRA
MAGNETIC RESONANCE
MOLECULAR STRUCTURE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
RESONANCE
SPECTRA
TAR
ULTRAVIOLET SPECTRA