Selective oxidation of ethyl toluene or methyl styrene isomer mi

Details Selective oxidation of ethyl toluene or methyl styrene isomer mi Selective oxidation of ethyl toluene or methyl styrene isomer mi

1981-12-30

1983-02-15

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

260687R, 260702, C07C 700

Patent

active

043742971

ABSTRACT:
The meta isomer content of ethyl toluene or methyl styrene isomer mixtures containing predominately meta isomer and para isomer is increased by subjecting the mixture to oxidation with an oxygen containing gas, e.g. air in the presence of a zeolite modified with a transition metal oxidation catalyst, e.g. Co or Cu ZSM-5. The para isomer is selectively oxidized and the meta isomer is easily separated from the product to give isomer mixtures containing greater than 90 percent meta from mixtures containing 60-65 percent meta and not separable by conventional means.

REFERENCES:
patent: 3702886 (1972-11-01), Argauer et al.
patent: 3709979 (1973-01-01), Chu

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