Process of preparing catalyst for the production of alkynols and alkynediols

摘要

A catalyst containing 10-15% Cu and 2-7% Bi is made by impregnating a continuous phase silica gel with an aqueous nitric acid solution of cupric and bismuth nitrates at room temperature for 5-15 minutes and heating the resulting blue gel at 450 DEG -700 DEG C. for 2-100 hours. Specifications 807,581, 937,887 and U.S.A. Specifications 2,300,969 and 2,768,215 are referred to.ALSO:Alkynols are made from an aldehyde or ketone reacting in liquid phase with an acetylene RC­CH in which R is hydrogen or a hydrocarbon in the presence of a catalyst consisting of 10-15% Cu and 2-7% Bi or SiO2, which has itself been prepared by impregnating a continuous phase silica gel with an aqueous nitric acid solution of cupric and bismuth nitrates at room temperature for 5-15 minutes and heating the resulting blue gel at 450-700 DEG C. for 2-100 hours. The examples describe preparation of butynediol and propynol from formaldehyde and acetylene. Specifications 807,581, 937,887 and U.S.A. Specifications 2,300,969 and 2,768,215 are referred to.