Carbon Dioxide → Phenol

Participants

Reaction Conditions

Reaction Steps

A phenol-free magnesium oleate/carbonate containing about 4.5% magnesium was prepared by the following procedure. A mixture of 529.3 g of oleic acid, 600 g of Shellflex™ 6111 light mineral oil, 400 g of isopropyl alcohol, 350 g of isodecyl alcohol, 400 g of water was heated to 140° F. and 400 g of magnesium hydroxide was added. The neutralization of the acid with the magnesium hydroxide caused the temperature to rise to 167° F. Carbon dioxide gas was passed into the reaction mixture through a subsurface addition tube at a rate of 225 ml/minute for 6 hours, during which time the temperature was gradually raised to 223° F. and 720 ml of a mixture of water and isopropyl alcohol was removed. The temperature was raised to 305° F. and the remaining water was removed with the assistance of the carbon dioxide addition. The carbon dioxide addition was stopped, and the hot reaction mixture was filtered with suction with the assistance of filter aid, giving the overbased magnesium product as a clear light yellow mobile liquid. The product was analyzed to contain 4.5% magnesium by weight.

Provenance & Evidence