Abstract:
Commerciallyavailable castor oil was analysed for specific gravity at 25/25 ºC (0.959), acid value (0.5), iodine value (85), refractive index at 25 ºC (1.4769), viscosity at 25 ºC (6.8), and hydroxyl value (162). Fatty acid composition, including palmitic acid (1.7%), stearic acid (1.39%), oleic acid (5.73%), linoleic acid (6.25%), and ricinoleic acid (84.2%) was estimated by means of GLC. Unbodied dehydrated castor oil (DCO- 15) 93% was prepared by using sodium bisulphate and sodium bisulphite and other reaction conditions. Unbodied DCO was analysed for iodine value (139), acid value (3.6), refractive index at 25 ºC (1.4820), specific gravity at 25/25 ºC and 30/30 ºC (0.9333&0.925) viscosity at 25 ºC and 30 ºC (200 cps & 1.85 poise), respectively. Fatty acid composition was also determined to ascertain the extent of dehydration due to the formation of conjugated linoleic acid (CLA, 36.9%) and non conjugated linoleic acid (NCLA, 46.8%). Ricinoleic acid was estimated as 3.83%. Unbodied DCO-15 was in good conformance with the standard specification of ASTM and other values cited in the literature.
Page(s):
176-179
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Scientific and Industrial Research (Series A: Physical Sciences), Volume: 57, Issue: 3, Year: 2014
Keywords:
ricinoleic acid
,
linoleic acid
,
castor beans oil
,
dehydrated caster oil
,
gas liquid chromatography