Stearic Acid → Isopropenyl stearate

Participants

Reaction Conditions

Reaction Steps

The zeolite was prepared in a conventional way using a 1N aqueous zinc acetate solution and drying the partially exchanged zeolite for about 16 hours at about 150° C. The dried zeolite contained about 4.0% zinc. Fifteen grams of the loaded zeolite plus 100 g (0.36 moles) of melted stearic acid were sealed in a 1-liter pressure vessel equipped with a magnetic stirrer, a gas inlet tube and a thermocouple, and the air within replaced by nitrogen. Approximately 80 ml of a liquified gas, the composition of which is about 60% of a 50--50 mixture of propyne and allene and about 40% propane, containing approximately 0.5 mole methyl acetylene in a pressure burette was pushed into the pressure vessel using pressurized nitrogen gas. An electric heater was used to heat the vigorously stirred mixture for 10 minutes at 120° C. at a pressure of about 400 pounds per square inch at which time the pressure vessel and its contents were rapidly cooled and the pressure in the vessel discharged to atmospheric pressure. Infrared analysis of the pale ivory colored solid gave the same spectra as that of a reference sample of isopropenyl stearate.

Provenance & Evidence