Detail of "2189-60-8"

Reference

Analysis of olefins in cracked oils by high-performance liquid chromatography (Part 1)

Analysis of olefins in cracked oils by high-performance liquid chromatography (Part 1). A study on the silver nitrate impregnated-silica column. Matsuzawa, Sadao; Shimizu, Yukio; Tamura, Mitsuhisa (Natl. Res. Inst. Pollut. Resour. 305, Japan). Sekiyu Gakkaishi, 30(1), 7-10 (Japanese) 1987. CODEN: SKGSAE. ISSN: 0582-4664. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 80 To det. the optimum concn. of AgNO3 in SiO2 column sepn. of olefins, the relation of AgNO3 concn. to the capacity factor (k') and/or to the recovery were investigated with several kinds of olefins. Hexane [110-54-3], commonly used in hydrocarbon group anal. of oils by high-performance liq. chromatog., was selected as a mobile phase. Nucleosil 50-5 was used as the stationary phase. Octane [111-65-9] and octylbenzene [2189-60-8] were also used to check the sepn. of olefins from paraffins and aroms. The k' for all olefins increased as the AgNO3 concn. (vs. wt. of dried silica gel) increased. Irreversible adsorptions occurred, for 1,7-octadiene [3710-30-3], 1,5-cyclooctadiene [111-78-4] and cyclooctene [931-88-4] at high concns. Broadening of the chromatog. bands could be minimized by using 0.5% AgNO3 concn.There are some commonly used reagents with their cas registry numbers 110-54-3 and 111-65-9 in this article. However, overlapping between 1,7-octadiene (k' = 0.83 and octylbenzene (k' = 0.91) occurred at 0.5%. Thus, AgNO3 concn. must be below 0.5% in analyzing the diolefin contg. oils. .

Predictive simulation of the solvent extraction of aromatics from middle distillates

Predictive simulation of the solvent extraction of aromatics from middle distillates. Rahman, M. (Inst. Francais Pet., Rueil-Malmaison, Fr.). Report, IFP-30-955; Order No. DE84750604, 131 pp. Avail. NTIS (U.S. Sales Only) From: Energy Res. Abstr. 1984, 9(9), Abstr. No. 15940 (French) 1983. DOCUMENT TYPE: Report CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) This work describes a predictive method for calcg. liq.-liq. extn. of aroms. from a middle distillate. Group contribution models of the ASOG and UNIFAC type are investigated. Four vapor-liq. equil. (VLE) on the binary of naphthalene (I) [91-20-3]-n-docecane [112-40-3], I-n-tetradecane (II) [629-59-4], phenanthrene (II) [85-01-8], n-hexadecane (IV) [544-76-3], and trans-decalin (I) [493-02-7]-C6H6 [71-43-2] and 2 solid-liq. equil. (SLE) on the binary of - IV and III - IV were measured. DMF [68-12-2] was chosen as an extg. solvent. Three liq.-liq. equil. (LLE) on the binary of DMF with IV, II or V + cis-decaline [493-01-6] and 6 ternary LLE on the mixt. of DMF-IV with octylbenzene [2189-60-8], Tetralin [119-64-2], 1-Me naphthalene [90-12-0], II or benzothiophene (VI) [95-15-8] and on the mixt. of decalin-DMF with VI were also measured. The parameters of the models are based mainly on the data for the systems composed by C10-20 hydrocarbons. The data for VLE, SLE and the inifinite diln. activity coeff. (17-245 °C) were used to calc. interaction parameters between hydrocarbon groups, and LLE data (20-80°) for interaction parameters of DMF - hydrocarbon groups. The validity of the models for predicting the LLE of DMF - hydrocarbon multicomponent mixt. (8 components) was verified. Middle distillate representation is based on mass spectrometric and gas chromatog. anal. and on limited data on middle distillate-DMF LLE. Two models for middle-distillate representation were investigated. The performance of ASOG and UNIFAC are sufficiently valid for representing of basic data and for the predicting the solvent extn. of aroms. from middle distillates. The method investigated can be useful for the rapid preliminary study of extn. processes.