Title: Overbased metal-containing detergents
Application Number: 97195134 Application Date: 1997.05.16
Publication Number: 1220691 Publication Date: 1999.06.23
Approval Pub. Date: 2001.10.17 Granted Pub. Date: 2001.10.17
International Classifi-cation: C07G17/00;C10M159/22
Applicant(s) Name: Exxon Chemical Patents Inc. Address:
Inventor(s) Name: P. Skinner;A. Lenack
Attorney & Agent: chen jizhuang
Abstract:
    A method of manufacturing a calcium overbased detergent, of TBN at least 300, from at least two surfactants, at least one of which is a phenol surfactant or a salicylic acid surfactant. Overbasing is carried out in at least two steps, at a temperature of less than 100 DEG C, at least one of the overbasing steps being followed by a heat-soaking step. The overbased detergents produced may be useful marine diesel lubricant additives.
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