Isomerization of alkyl aromatics using a gallium containing alum

Details Isomerization of alkyl aromatics using a gallium containing alum Isomerization of alkyl aromatics using a gallium containing alum

1979-04-18

1981-01-13

O'Keefe, Veronica

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

585475, 208111, 208139, C07C 522

Patent

active

042451302

ABSTRACT:
The present invention relates to a process for the hydrocatalytic treatment of hydrocarbon feedstock which is a mixture of alkyl aromatics containing at least one di- or polymethyl benzene and an alkyl benzene selected from ethyl-benzene, methyl ethyl-benzene and propylbenzene by contacting the mixture at 300.degree. to 500.degree. C., a pressure of 0 to 100 bars gauge and in the presence of hydrogen with a gallium containing aluminosilicate catalyst and recovering the desired product. The aluminosilicate has a silica to alumina ratio of between 10:1 and 100:1 on a molar bases. The xylene products are useful raw materials as such or for making the corresponding dicarboxylic acids.

REFERENCES:
patent: 3449456 (1969-06-01), Amir et al.
patent: 3970544 (1976-07-01), Rosinski et al.
patent: 4056575 (1977-11-01), Gregory et al.
patent: 4059645 (1977-11-01), Jacobson

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