Abstract
Catalysts composed of 6% nickel deposited on silica, Cab-O-Sil, and alumina were found to be very effective for the conversion of primary alkanols to ethers at 160–190 ° in a flow system and in the presence of hydrogen. Nickel on magnesia, under similar conditions, had no catalytic activity. The effect of varying concentrations of nickel on Cab-O-Sil were investigated as catalysts for the conversion of butanol to dibutyl ether. Catalysts containing 7 to 37% nickel were found to be the most active and selective for this reaction. At 190 °, alumina as such was inert towards the conversion of neopentyl alcohol; however, in the presence of 6% nickel on alumina, 23% of the alcohol reacted and the product of the reaction contained 69% of dineopentyl ether and 2% of 1,1-dimethylcyclopropane. Nickel on Cab-O-Sil was found to be the most effective catalyst for the formation of ethers. The mechanism of dehydration is discussed.
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