Overbased sulfurized alkaline earth metal phenates which are oil soluble, excellent in detergency dispersancy and have high base value, and an effective process for production of said overbased sulfurized alkaline earth metal phenates under conditions providing less sludge and less raw material recovery, and further a lubricating oil additives containing said overbased sulfurized alkaline earth metal phenates as a main ingredient and a lubricating oil composition which comprises said lubricating oil additive compounded in a lubricating oil are disclosed.
Since the resulting overbased sulfurized alkaline earth metal phenates have high base value and excellent oil-solubility, they can be effectively utilized as lubricating oil additives.
过基
硫化碱土
金属
酚酸盐是油溶性的,具有优异的清洁分散性和高碱值,并且提供了在条件下生产所述过基
硫化碱土
金属
酚酸盐的有效工艺,该条件下可减少泥渣和原料回收,进一步揭示了含有所述过基
硫化碱土
金属
酚酸盐作为主要成分的润滑油添加剂和润滑油组合物,该润滑油添加剂混合在润滑油中。由于所得的过基
硫化碱土
金属
酚酸盐具有高碱值和优异的油溶性,因此它们可以有效地用作润滑油添加剂。