The DIC technology was defined, patented and developed by Allaf et al. The application of this technology for extraction is one of the new extraction techniques which take short extracting time and reduce the consumption of solvent. The DIC was successfully applied for extraction volatile compounds and essential oils. It also has been effectively used for improving the yields of rapeseed oil extraction through the texturing impact. This paper presents a study of jatropha oil hexane extraction with DIC technology treatment as a pre-treatment process. | JOURNAL OF SCIENCE, Hue University, Vol. 69, No. 6, 2011 IMPACT OF TEXTURING BY INSTANT CONTROLLED PRESSURE DROP (DIC) ON SOLVENT EXTRACTION OF JATROPHA CURCAS OIL Nguyen Van Cuong College of Technology, CanTho University Abstract. The impact of Détente Instantanée Contrôlée - DIC (French for Instant controlled pressure drop) treatment on the oil hexane extraction process from Jatropha Curcas seed of Vietnam was investigated. A response surface methodology based on central composite rotatable design was used to analyze the influence of the different DIC operative parameters and optimize the treatment in terms of saturated steam pressure (P = MPa) and thermal treatment time (t = 70 s). Whatever DIC treatment conditions the yield of oil obtained, after 2 hours of extraction, was higher than that of the untreated DIC sample (control sample); and the extraction rate (extraction kinetic) of treated DIC samples was faster than that of the control sample. The effective diffusivity of the treated DIC samples can reach a value *10-12 to *10-12 while it is about *10-12 for the control sample. The starting accessibility can reach as against for the control sample. The scanning electron microscopy (SEM) micrographs provided the positive evidence modifications of seed structure due to the DIC treatment. Keywords: extraction, jatropha, instant controlled pressure drop, DIC, vegetable oil. 1 Introduction In the recent years, Jatropha Curcas for the production of biodiesel has been investigated. Jatropha Curcas is one of non-edible oils, which is cultivated in the Central and South America, South-east Asia, India and Africa and in the tropical and subtropical parts of the World. It does not compete with conventional food or feed crops as rapeseed, sunflower seed, etc. This allows it to be a perfect source for non edible uses (recently as biodiesel source) [1]. In Vietnam, jatropha has been planted in a number of provinces throughout
