• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2012, Volume: 5, Issue: 9, Pages: 1-8

Original Article

Optimising refined bleached deodorized palm stearin for its crude stearic acid iodine value to provide the stable specification of blended stearic acid distillate iodine value


On the commercial scale, the quality standard of Blended Stearic Acid Distilled (BSAD) couldn’t be achieved by normal distillation. BSAD iodine value is mostly higher than maximum quality standard (0.2 mg/100 g), with the same iodine value (0.80 g/100 g) of feed Hydrogenated Splitted RBDPS Fatty Acid or HSRBDPSFA, feed capacity 5.5 ton/hour with bottom flash distiller temperature reaching 213oC. The separation and reduction of chemical impurities (so sensitive to oxidation/temperature/heat changing, and iodine value) were done. The effect of the reduction of feed iodine value (IV), increasing of feed capacity and bottom temperature of flash distiller column (BFD) were optimized to observe BSAD’s iodine value trend by using a factorial design (3 x 2 x 3) method. The optimum condition was found on the feed IV of 0.60 g/100 g, at feed capacity 6.0 ton/hour, and BFD temperature 222oC. Iodine value of BSAD was stable and in specs on 0.175 g/100 g.
Keywords: Distillation, Iodine value, Bottom flash distiller temperature, Quality standard, Distillate, Feed capacity


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