title: Isolation and identification of diisopropylnaphthalene isomers in the alkylation products of naphthalene.
abstract: GC analysis of diisopropylnaphthalene (DIPN) isomers is presented. Naphthalene was repeatedly alkylated with propylene over an amorphous aluminosilicate catalyst under different preparation conditions, and then pure isomers or at least DIPN fractions enriched in individual isomers were isolated from the alkylates and analysed using GC-MS, IR and NMR techniques. Eight of the ten possible isomers appeared in the chromatograms; seven of them (1,3-, 1,4-, 1,5-, 1,6-, 1,7-, 2,6- and 2,7-) were separated and identified, while the eighth one was indirectly proved to be 2,3-DIPN. The remaining two isomers (1,2- and 1,8-DIPN) were not found in the products.
authors.affiliation: Industrial Chemistry Research Institute, Warsaw, Poland. robert.brzozowski@ichp.pl
authors.forename: Robert
authors.initials: R
authors.lastname: Brzozowski
authors.forename: Wincenty
authors.initials: W
authors.lastname: Skupiński
authors.forename: Michal H
authors.initials: MH
authors.lastname: Jamróz
authors.forename: Maciej
authors.initials: M
authors.lastname: Skarzyński
authors.forename: Hanna
authors.initials: H
authors.lastname: Otwinowska
mesh_terms: D000478:Alkylation; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D009281:Naphthalenes / Q000737:chemistry / Q000302:isolation & purification*; D013055:Spectrophotometry, Infrared
chemical_list: D009281:Naphthalenes; C031721:naphthalene