Process for preparing d,1-menthol from d-menthol

Details Process for preparing d,1-menthol from d-menthol Process for preparing d,1-menthol from d-menthol

C - Chemistry, Metallurgy

07

C

C07C 35/12 (2006.01) B01J 23/889 (2006.01) C07C 29/56 (2006.01) C07C 29/88 (2006.01)

Patent

CA 2176552

A process is described for preparing d,1-menthol by catalytic rearrangement of optically active d-menthol in the presence of hydrogen at temperatures of from 200 to 350°C and under pressures of from 50 to 350 bar over fixed-bed catalysts comprising support-free reduced shaped bodies of pressed powders of nickel, manganese, alkaline earth metal (hydr)oxides and optionally (hydr)oxides of elements of transition groups V and/or VI of the Periodic Table.

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