Rice bran oil

About: Rice bran oil is a research topic. Over the lifetime, 2102 publications have been published within this topic receiving 32504 citations.

Industrial refining production method of rice bran oil and equipment thereof

Abstract: The invention relates to a rice bran oil industrialized refining method and a device for implementing the method. The invention effectively satisfies the rice bran oil refining demands in the rice bran oil industrialized refining. The method is implemented by degumming with water, dewaxing, primary alkali refining, secondary alkali refining, cleaning with water, drying and decolorization, as well as deacidification and deodorization in turn. The device is characterized in that a first crude oil temporary storing tank is connected with a fourth oil pump sequentially through a first oil pump, a hydration kettle, a second oil pump, a pre-cooling tank, a third oil pump and a crystallizing tank, which are connected in series; the fourth oil pump is connected with a first oil refining caldron sequentially through a first frame filtering machine, a second crude oil temporary storing tank and a fifth oil pump; the first oil refining caldron is connected with the water-cleaning caldron sequentially through a sixth oil pump, a second oil refining caldron and a seventh oil pump; the water-cleaning caldron is connected with a decolorization oil pump, a second frame filtering machine, a decolorization oil tank and a deacidification and deodorization kettle through a drying and decolorization kettle; and the deacidification and deodorization kettle is connected with a polishing filter through a shielding pump and a condenser. The invention has the advantages of low production cost, high efficiency, good effect, capability in industrialized mass production and great economic and social benefit.

Rice bran: A prospective resource for biodiesel production in Bangladesh

Abstract: The increasing demand of renewable energy sources has pressed the need to search for biofuels. The world is not only thrusting for potential sources of biofuels but also surveilling not to hamper the food supply, particularly in the Third World countries, such as Bangladesh. Rice bran oil is a prominent source of biofuels. Rice, the main cereal in Bangladesh, is cultivated all the year round. Rice hull containing bran is mostly wasted and merely used as feedstock for cattle and for cooking purposes. This study considered rice bran as a prospective source of biodiesel in Bangladesh. The properties of oil collected from rice bran were investigated to ensure the production of biodiesel by transesterification. An economic analysis relative to Bangladesh was conducted, and the production rate of biodiesel under different percentage of catalyst was investigated.

A study of rice bran oil refining

Abstract: Examination of a number of rice bran oils revealed the presence of monoglycerides (0.5–1.4%) and other hydroxylated compounds such as diglycerides and glucosides. The hydroxyl numbers of the samples ranged from 8.5 to 27, depending on their acidity. On the assumption that the inordinately high refining losses of rice bran oil are due, along with the acidity, to the presence of hydroxylated compounds, the hydroxyl numbers of several samples of that oil were reduced by progressive acetylation with acetic anhydride. This was accompanied by gradual reduction of the refining losses, which seems to support the above mentioned assumption.

A novel process for physically refining rice bran oil through degumming

Abstract: A new process for the physical refining of rice bran oil through combined degumming was developed on a laboratory scale. Studies were conducted to improve quality of rice bran oil by degumming to make it edible grade. Oil contains phosphatides, carbohydrates mucilages, proteins and resins as a gummy substance which impact colour turbidity and odour to rice bran oil. This investigation showen that phosphoric acid and water mixture (0.75 + 3 %) appear to be most effective degumming agent. The transmittance of oil improved from 37 to 57 % at 570 nm. The Viscosity, Unsaponification matter and melting point decrease and Iodine Value and Saponification value increased in degummed rice bran oil as compare to rice bran oil. The results of present investigation are shown to improve the quality of oil.

The composition of lipids from rice hulls and from the surface of rice caryopsis

Abstract: Samples of hulls, of whole and ground caryopsis and of bran obtained from the Brazilian rice variety IAC 1246, were extracted with hexane and the characteristics and composition of the corresponding lipids were determined The lipids from rice hulls showed a four times higher content of unsaponifiable matter and of free fatty acids than those from rice bran and rice caryopsis There were also differences in the fatty acid composition as evidenced by the presence of 2–3% of saturated C22 and C24 acids and a lower proportion of unsaturated acids in the rice hull lipids On the other hand there was a close resemblance between the rice hull lipids and those on the surface of the caryopsis Chromatographic analysis of the unsaponifiable matter of lipids from rice hulls and caryopsis surface disclosed the presence of hydrocarbons, alcohols and sterols in ascending order, the sterols consisting of about 50% of β-sitosterol, 20–40% of campesterol, 10–20% of stigmasterol and 2–3% of cholesterol On the basis of the above results it was concluded that a preliminary solvent extraction of paddy rice in order to remove the waxy lipids from the hulls and the caryopsis surface would benefit the subsequent milling process and improve the quality of the brown rice and of crude rice bran oil