Process for the catalytic isomerization of o-cresol
AssigneeUnion Rheinische Braunkohlen Kraftstoff Aktiengesellschaft
InventorsKarl-Heinz Keim, Reinhard Kiauk, Ewald Meisenburg
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Abstract
Isomerization of o-cresol to m-cresol by contact with a crystalline aluminosilicate zeolite of the ZSM-type, having a silica to alumina ratio greater than 5, at a temperature of about 350.degree. to 450.degree. C.
Claims4
In a process for isomerisation of o-cresol to m-cresol in the presence of an alumina and silica containing catalyst at elevated temperatures, the improvement which comprises reacting the o-cresol at temperatures of about 350.degree. to 450.degree. C. in the presence of an acidly acting crystalline aluminosilicate zeolite of the ZSM-type with a composition of oxides and water in the molar ratio of 1.+-.0.4 M.sub.2 O/n:Al.sub.2 O.sub.3 :5-100 SiO.sub.2 :0-60 H.sub.2 O, M representing a cation having a valence of n.
Dependencies are inferred from the claim text.