Synthesis of the 5- and 6- methyltetralins by continuous methyla

Details Synthesis of the 5- and 6- methyltetralins by continuous methyla Synthesis of the 5- and 6- methyltetralins by continuous methyla

1990-12-26

1991-12-17

Mc Farlane, Anthony

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

C07C 268

Patent

active

050736540

ABSTRACT:
Continuous methylation of tetralin with methanol over several solid acid catalysts affords a mixture of 5-methyltetralin and 6-methyltetralin with selectivity of better than 65% at high conversions. Zeolite .beta. is a particularly effective catalyst insofar as it catalyzes the reaction at a temperature approximately 100.degree. C. lower than that required for silica-aluminas. However, the reaction temperature is quite sensitive to the concentration of methanol in the feedstock.

REFERENCES:
patent: 3187063 (1965-06-01), Burk et al.
patent: 3242221 (1966-03-01), Kovach et al.

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