Non-sulfide (unsulfurized) alkyl a reduced content-having-substituted hydroxyaromatic compounds and their non-sulfide metal salt sulfide (sulfurized) alkyl - a process for preparing a salt of the substituted hydroxyaromatic compositions disclosed herein. The method includes the steps of at least:
(A) (i) sulfurized alkyl-salt of the substituted hydroxyaromatic compound; (Ⅱ) non-sulfurized alkyl-substituted hydroxyaromatic compound; And (iii) alkyl-comprising the steps of: providing a composition comprising a non-sulfurized metal salt of the substituted hydroxyaromatic compound; Here, the alkyl-substituted hydroxyaromatic compound is derived from a step in which propylene, butylene, or one or more olefins containing a C ₉ to C ₁₈ oligomers of monomers selected from a mixture thereof with hydroxy alkylation of a hydroxy aromatic compound; And
(B) a reduced content of non-sulfide, alkyl-sulfide, alkyl having substituted hydroxyaromatic compounds and their non-sulfide metal salt-under sufficient extraction conditions to provide the salt of the substituted hydroxyaromatic composition of step (a) the non-sulfurized alkyl from a composition-substituted hydroxyaromatic compound, and its non-sulfide metal salt, wherein the non-sulfurized alkyl-extracting with a substituted hydroxyaromatic compound and at least one solvent capable of dissolving his unsulfided metal salt .