Process for the preparation of 2-chloro- or 2-bromonaphthalene

Details Process for the preparation of 2-chloro- or 2-bromonaphthalene Process for the preparation of 2-chloro- or 2-bromonaphthalene

C - Chemistry, Metallurgy

07

C

260/653.1

C07C 17/00 (2006.01) C07C 17/358 (2006.01) C07C 25/22 (2006.01)

Patent

CA 2020364

HOE 89/F 213 Abstract of the disclosure: Process for the preparation of 2-chloro- or 2-bromonaphthalene Process for the preparation of 2-chloro- or 2-bromonaph- thalene by isomerizing 1-chloro- or 1-bromonaphthalene over a zeolite as a catalyst which, in the anhydrous and template-free form, has the general formula (A) Z ? Al2O3 ? x SiO2 (A) in which Z denotes M?O, MIIO or (MIII)2O3, in which MI represents an alkali metal atom or ammonium or a hydrogen atom, MII represents an alkaline earth metal atom and MIII represents a rare earth metal of atomic number 57 to 71 in the Periodic Table of the Elements, and x denotes a number from 4 to 4,000, with the proviso that if Z represents M?O, at least some of the alkali metal atoms are replaced by hydrogen atoms, ammonium and/or the other metal atoms mentioned.

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