B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/110, 252/52,
B01J 27/24 (2006.01) B01J 27/02 (2006.01) C07B 43/02 (2006.01) C07C 201/08 (2006.01) C07C 205/06 (2006.01) C07C 205/12 (2006.01) C07C 205/37 (2006.01)
Patent
CA 1258666
VAPOR PHASE NITRATION CATALYSTS AND PROCESSES FOR THE PREPARATION AND USE THEREOF ABSTRACT OF THE DISCLOSURE Aromatic compounds are nitrated in the vapor phase via a process comprising contacting the aromatic compounds with a nitrating agent in the presence of a nitration promoting catalyst. Such catalysts are pre- pared by contacting a Group 4b-Group 3b metal oxide composition represented by the empirical formula: (M1aM2bOc)x(NO2)y wherein M1 is at least one element selected from Group 4b of the Periodic Table of the Elements, M2 is at least one element selected from Group 3b of the Peri- odic Table of the Elements, a is 1, b is 0 to 20, c is a number taken to satisfy the average valences of M1 and M2 in the oxidation states in which they exist in the composition, x is 1, and y is 0 to c, with a cata- lytically effective amount of sulfur trioxide. The catalysts are particularly effective to catalyze the vapor phase nitration of chlorobenzene and are char- acterized in such reaction by providing a para/ortho isomer distribution ratio of at least about 2/1.
495257
Mcfadden Fincham
Solutia Inc.
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