Detail of "6158-45-8"

Reference

Catalytic conversions of

Catalytic conversions of .alpha.-n-alkylnaphthalenes in the presence of type X and Y zeolites. Dimitrova, R.; Dimitrov, Kh. (Sofii. Univ., Sofia, Bulg.). God. Sofii. Univ., Khim. Fak., 68, 147-56 (Bulgarian) 1977. CODEN: GSKFAL. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 26, 67 The conversions at 450.degree. and liq. space velocity 0.88-1.0/h over NaX zeolite catalyst of 1-methyl- [90-12-0], 1-ethyl- [1127-76-0], 1-propyl- [2765-18-6], 1-butyl- [1634-09-9], 1-pentyl- [86-89-5], 1-isopropyl- [6158-45-8], and 2-butylnaphthalene [1134-62-9] were 3.8, 30.0, 47.0, 32.0, 27.0, 60.0, and 38.0%, resp. Corresponding conversions over NaY were 7.5, 38.5, 69.5, 50.0, 45.0, 96.0, and 30.0%, and over amorphous aluminosilicate 98.0, 87.4, 83.5, 81.0, -, 86.0, and 47%. The principal reactions were dealkylation, isomerization, and fragmentation; disproportionation also occurred on the aluminosilicate.

Isopropylation of naphthalene by isopropyl alcohol over USY catalyst: an investigation in the high-pressure fixed-bed flow reactor

Isopropylation of naphthalene by isopropyl alcohol over USY catalyst: an investigation in the high-pressure fixed-bed flow reactor. Wang, Jun; Park, Jung-Nam; Park, Yong-Ki; Lee, Chul Wee (Advanced Chemical Technology Division, Korea Research Institute of Chemical Technology (KRICT), Yusung, Daejeon 305-600, S. Korea). Journal of Catalysis, 220(2), 265-272 (English) 2003 Elsevier Science. CODEN: JCTLA5. ISSN: 0021-9517. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 25, 67 Catalytic performances of USY, H-mordenite, dealuminated H-mordenite, and H-MCM-22 zeolite catalysts in the isopropylation of naphthalene by iso-Pr alc. with decalin or cyclohexane as a solvent were compared in a high-pressure fixed-bed flow reactor. For the USY catalyst, reaction conditions, such as reaction temp. and pressure, reactant ratio and space velocity, and solvent concn. and type, were controlled to investigate in detail the effect of reaction conditions on the catalytic activity. Over H-mordenite, it was found that 2,6-diisopropylnaphthalene (2,6-DIPN) could be selectively synthesized with a 2,6-/2,7-DIPN ratio of 2.46, and dealumination could enhance not only the selectivity of 2,6-DIPN, with a 2,6-/2,7-DIPN ratio of 2.67, but also the conversion of naphthalene, which was 27.4%, three times as high as that over the unmodified one at 6 h of reaction time on stream. However, neither the H-mordenite or the dealuminated one were catalytically stable and the selectivity of DIPN was at a very low level of less than 12%. In contrast, over the USY catalyst, a high and stable conversion of about 90%, a high selectivity of DIPN of more than 40%, and a considerable 2,6-/2,7-DIPN ratio of 1.46 could be achieved by adjusting the reaction conditions, although no shape selectivity was obsd. on USY.In this experiment, several chemicals are used like 2027-17-0 and 6158-45-8 On the other hand, only a low 2,6-/2,7-DIPN ratio of 0.47 with a low conversion of about 30% was revealed over H-MCM-22, which indicates that the reaction takes place on the external surface of this zeolite. An attempt has been made to explain the catalytic activity, selectivity, and stability in relation to the zeolite structures, product properties, and reaction conditions. .