Patent ID: 8933002
Filing Date: 2015-01-13
Classification: C07C,C10M,C10N

Abstract:
1. A process for preparing an overbased salt of a sulfurized alkylhydroxyaromatic compound, the process comprising the steps of: (a) sulfurizing an alkylhydroxyaromatic compound derived from alkylation of a hydroxyaromatic compound with one or more olefins comprising C (b) removing any unsulfurized alkylhydroxyaromatic compound from the sulfurized alkylhydroxyaromatic reaction product of step (a) to provide a sulfurized alkylhydroxyaromatic compound substantially free of the unsulfurized alkylhydroxyaromatic compound; and (c) neutralizing and overbasing the sulfurized alkylhydroxyaromatic compound of step (b) to provide an overbased salt of the sulfurized alkylhydroxyaromatic compound, wherein the overbased salt of the sulfurized alkylhydroxyaromatic compound contains less than about 2% by combined mass of the unsulfurized alkylhydroxyaromatic compound and its unsulfurized metal salt.