Patent ID: 8207380

Claim:
A process for alkylating an hydroxyaromatic compound comprising reacting at least one phenol compound with a branched olefinic propylene oligomer having from about 20 to about 80 carbon atoms in the presence of an acid catalyst, wherein the resulting product comprises an alkylated hydroxyaromatic compound having the following structure: wherein R 1 is a branched alkyl group of at least 18 carbon atoms having an average of at least one branch every 2 carbon atoms wherein each branch contains 1 to 2 carbon atoms, R 2 is an alkyl group having 1 to 5 carbon atoms, and R 3 is either hydrogen or an alkyl group, and further wherein the resulting product is a mixture of ortho and para isomers and wherein the acid catalyst comprises hydrochloric acid, hydrofluoric acid, hvdrobromic acid, sulfuric acid, perchloric acid, trifluoromethane sulfonic acid, fluorosulfonic acid, Amberlyst® 36 sulfonic acid or nitric acid.