Council of Scientific and Industrial Research

Saravanan Krishnasamy

Venkata Padmaja Korlipara

Badari Narayana Prasad Rachapudi

Satya Bhaskar Potula

Venkata Surya Koppeswara Rao Bhamidipati

Sri Lakshmi K Mallampalli

Badari N P Rachapudi

Karunakar Reddy Rondla

The present invention relates to preparation of epoxy karanja oil, epoxy karanja fatty acid methyl esters and their acylated derivatives. Accordingly karanja oil and karanja fatty acid methyl esters were epoxidized using performic acid method. Karanja oil and its fatty acid methyl esters were also hydroxylated to prepare their acyloxy derivatives (C, C& C). Both the epoxy and acyloxy derivatives of karanja oil and its methyl esters were characterized byH NMR and IR studies. The products were evaluated for acid value (A.V.), hydroxyl value (H. V.), iodine value (I. V.), viscosity, viscosity index (V.I.), pour point, flash point and copper strip corrosion and lubricant properties like oxidation stability, air release value, evaporation loss, rust prevention characteristics, hydrolytic stability, foam stability and load carrying capacity and found to be potential base stocks for hydraulic, metal working fluids and other industrial fluids.

Process for the preparation of karanja oil-based epoxy and acyloxy compounds as lubricant basestocks

Castor oil was hydrolysed to castor fatty acids and self condensed to get a ricinoleic acid-based estolide of about 95 acid value. The carboxylic group of the estolide on subsequent esterification with linear or branched chain alcohols and also on acetylation of free hydroxy group yielded castor oil fatty acids based estolide esters and their acetates. All the products were evaluated for total acid number (TAN), viscosity, viscosity index, pour point, flash point, and copper strip corrosion and found to be potential lubricant basestocks.

Castor oil fatty acid based estolide esters and their derivatives as potential lubricant base stocks

The present invention relates to modification of the chemical structure of ricinoleic acid, which is present to an extent of 85-90% in castor oil into triacyloxy alkyl ester derivatives. Accordingly, 9,10,12-trihydroxy octadecanoic acid rich fatty acid mixture was prepared from castor oil and converted to their alkyl esters followed by acylation of hydroxy groups to get 9,10,12-triacyloxy octadecanoic acid alkyl ester rich fatty acid alkyl esters mixture. The 9,10,12-triacyloxy octadecanoic acid alkyl esters were purified from the crude product and characterized byH NMR studies. The crude products were also evaluated for acid value (A.V.), hydroxyl value (H. V.), iodine value (I. V.), viscosity, viscosity index (V.I.), pour point, flash point and copper strip corrosion and found to be potential base stocks for hydraulic, metal working fluids and other industrial fluids.

9,10,12-triacyloxy octadecanoic acid alkyl ester and 9,10,12-triacyloxy octadecanoic acid alkyl ester rich fatty acid alkyl esters mixture and a process for preparation thereof

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Hyderabad Telangana, India

Saravanan Krishnasamy