Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1985-05-31
1990-06-19
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
C07C 1724, C07C 1700
Patent
active
049355619
ABSTRACT:
The invention relates to a process for isomerizing monochlorotoluenes or dichlorotoluenes on a zirconium-containing zeolite catalyst of the Pentasil type. Catalysts of this type are distinguished by a particularly high activity coupled with a long service life. In particular, the invention relates to the preparation of a mixture 3-chlorotoluene and 4-chlorotoluene by isomerizing 2-chlorotoluene on zircoium-containing zeolite catalysts of the Pentasil type.
The invention also relates to the preparation of a mixture of 2,5-dichlorotoluene and 3,4-dichlorotoluene by appropriate isomerization of 2,4-dichlorotoluene, and to the preparation of a mixture of 2,4-dichlorotoluene and 2,5-dichlorotoluene by appropriate isomerization of 3,4-dichlorotoluene.
REFERENCES:
patent: 4175175 (1979-11-01), Johnson et al.
patent: 4368339 (1983-01-01), Tada et al.
"Ullmann's Encyclopedia of Industrial Chemistry", (1975), 4th Edition, vol. 9, pp. 512-513.
G. A. Ohah, M. W. Meyer, J. Org. Chem., 27, 3464, (1964).
"Methods of Organic Chemistry", vol. V/3, (1962), pp. 659 and 660.
Chemical Abstracts, 100, 51,224 s.
Arpe Hans-Jurgen
Baltes Herbert
Eichler Klaus
Leupold Ernst I.
Hoechst Aktiengesellschaft
Lone Werren B.
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