PROCESS FOR THE PREPARATION OF KARANJA OIL-BASED EPOXY AND ACYLOXY COMPOUNDS AS LUBRICANT BASESTOCKS

摘要

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 epoxidised using performic acid method. Karanja oil and its fatty acid methyl esters were also hydroxylated to prepare their acyloxy derivatives (C3, C4 & C6). Both the epoxy and acyloxy derivatives of karanja oil and its methyl esters were characterized by 1H 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.

主权项

1. A process for the preparation of compounds of general formula 1 comprising acylc compounds of general formula A and epoxy compounds of general formula wherein the said process comprises the steps of; a. Stirring Karanja oil with formic acid and concentrated sulphuric acid at temperat ranging between 15-20° C. followed by addition of 30% hydrogen peroxide at 4-10 for a period ranging between 1 to 2 hr and then stirring the contents at 50-70° C. a period of 1-6 hr to obtain epoxy compounds of general formula B and furt stirring at 80-85° C. for a period of 6-8 hr to obtain hydroxylated oil; b. optionally, refluxing Karanja oil with an alkali preferably, sodium hydrox dissolved in an alcohol under stirring for a period ranging between 3-4 hrs temperature ranging between 65-70° C. to obtain fatty acid alkyl ester further add formic acid and concentrated sulphuric acid into it and followed by addition of 3 hydrogen peroxide at 4-15° C. for a period ranging between 1-2 hr and then stirr the contents at 50-70° C. for a period of 1-5 hr to obtain epoxy compounds of gene formula B and further stirring at 80-85° C. for a period of 6-8 hr to obt hydroxylated fatty acid alkyl ester; c. acylating hydroxylated oil as obtained in step (a) or hydroxylated fatty acid al ester as obtained in step (b) with an acid anhydrides in presence of dimethly am pyridine (DMAP) taken in a water azeotrope forming solvent at a temperature 1 150° C. for a period ranging between 7-9 hr to obtain acyloxy compounds of gene formula A.