Process for the preparation of calcium phenate detergents from cashew nut shell liquid

US5910468A · kind A · utility

Assignee

• Indian Oil Corporation Limited · IN

Inventors

• Khem Chand Dohhen · Faridabad, IN
• Harish Chander Bhatia · Faridabad, IN
• Krishan Kumar Swami · Faridabad, IN
• Rakesh Sarin · Faridabad, IN
• Deepak Kumar Tuli · Faridabad, IN
• Madan Mohan Rai · Faridabad, IN
• Akhilesh Kumar Bhatnagar · Faridabad, IN

Key dates

• Filing date: Apr 6, 1998
• Grant date: Jun 8, 1999
• Expiry date: Apr 6, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10M159/22
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of sulphurized calcium phenate from cashew nut shell liquid (CNSL). Distilled or hydrogenated distilled CNSL is reacted with calcium salt and sulphur in the presence of promoters to obtain a reaction mixture. The reaction mixture is subjected to the step of carbonation to obtain basic sulfurized calcium phenate, which may be subjected to a further step of basefication to obtain overbased sulphurized calcium phenate. Such a calcium phenate is added to lubricating oil or grease as an additive.