Infrared Determination of Total Aromatics in Naphthas and Catalytic Reformates Boiling between 200° and 400° F.

Integrated Intensities of Absorption Bands in Infrared Spectroscopy

“…This application ranges from such recondite problems as inferring molecular-moment distributions by means of Eq. (1) to the simple matter of determining the percentage of aromatics in crude naphtha fractions from an area measurement [206]. The converse problem is the accounting of the vibrational spectrum from a knowledge of molecular structure.…”

Synthesis of Durene from Pseudocumene

“…paraffins (zzhexane, zz-nonane, zz-decane, zz-dodecane, and zz-tetradecane) are added as fillers to the product and the resulting solution is then fractionally distilled-boiling points of pseudocumene and durene differ by about 27.5°C .-using a 3-foot Hypercal distillation column at 10 to 1 reflux ratio. Boiling points of the fillers are used as cutpoint temperatures for collecting fractions and the compounds present are determined by a Perkins-Elmer Model 21 infrared spectrophotometer (4). The pseudocumene recovered can be recycled to produce additional dipseudocumylmethane.…”

Review - Petroleum

“…Interferences in thermally and catalytically cracked gasoline were first removed by treatment with alkaline permanganate. Bomstein (14) determined total aromatics in naphthas by measuring the area under the infrared spectrogram from 5.00 to 5.85 microns; he claims advantages over acid absorption, ultraviolet absorption, and Raman and mass spectrometry. Pasquinelli (141) determined aromatics in a w'ide variety of petroleum fractions boiling below 600°F.…”