Overbased sulfonate and its use as additive

Abstract

NEW MATERIAL: An overbased alkaline earth metal salt of a 10-13C alkyl orthoxylene sulfonic acid. USE: An additive to a lubricating oil. PREPARATION: An alkyl orthoxylene is reacted with a concentrated sulfuric acid, fuming sulfuric acid or the like to obtain a sulfonated product, which is mixed with an excess of an oxide or hydroxide of an alkaline earth metal (preferably Ca) in an organic solvent. In case that an overbased product is required, carbon dioxide is passed through the resultant mixture. COPYRIGHT: (C)1990,JPO

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    JP-2011507885-AMarch 10, 2011シェブロン・オロナイト・エス.アー., シェブロン・オロナイト・カンパニー・エルエルシー合成アルキルアリールスルホネートの製造方法
    JP-2011507886-AMarch 10, 2011シェブロン・オロナイト・エス.アー., シェブロン・オロナイト・カンパニー・エルエルシー合成アルキルアリール化合物の製造方法