Structural characterization of pitch feedstocks for coke making: Use of 13C coupled 1H n.m.r. spectroscopy

✍ Scribed by Shu-An Qian; Peng-Zhou Zhang; Bai-Ling Li

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 852 KB
• Volume: 64
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(85)90111-5

✦ Synopsis

Several pitches, used to make high-grade cokes, are characterized by 13C and 'H n.m.r. spectroscopy. Average molecular parameters of solvent fractions of the pitches indicate distinct differences in molecular structure. Principal differences between A-240 petroleum and medium coal-tar pitches are composition of fractions, aromaticity, degree of aromatic condensation and amount of naphthenic groups. The mild conditions of txoduction of A-240 petroleum Ditch leads to the formation of methylene bridges and biaryl linkages between iwo aromatic moietiks in consttuent molecules.