Abstract
The solvent power of petroleum solvents is highly dependent upon the percentage of aromatic compounds present in the mixture. In alkyl benzenes, it is dependent upon the proportion of aromatic character in the compounds. Suppliers of petroleum solvents frequently state the aromatic content of their solvents or provide figures for the Kauri-Butanol number, mixed aniline point, or related indicators of solvent power. When these data are not readily available, aromatic content in the petroleum solvents can be estimated by extraction with fuming sulfuric acid (R. L. Feller in Application of Science in the Examination of Works of Art, Museum of Fine Arts, Boston, 1959, p. 51; Feller, Stolow, anWiJnes, On Picture Varnishes and Their Solvents, Intermuseum Conservation Association, Oberlin, 195).
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