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.

Effect of Deep-Fat Frying on Physicochemical Properties of Rice Bran Oil Blends

Abstract: Rice bran oil, non conventional oil was blended with six traditional oils in the ratio of 70:30 and 80:20 for the enhancement of its market acceptability and awareness in consumers regarding its use in cooking. Effect of deep-fat frying on these blends was studied by assessing the changes in percent fat absorption and physicochemical properties during repeated frying process (three times). The physicochemical properties like smoke point, frying temperature, viscosity, peroxide value, iodine value, acid value, free fatty acids and saponification value of six rice bran oil blends were evaluated. By comparing all the RBO blends in terms of repeated frying process and changes in physical and chemical parameters, RBO+PO in both ratios was found to be the most stable frying medium up to third frying. So, this study will help the oil producing industry to find the most economically viable oil blends with desirable physicochemical properties for cooking purposes. KeywordsAcid value , Iodine value, Peroxide value, Saponification value, Smoke point

Nutritional and Health Benefits of Rice Bran Oil

Abstract: Rice bran oil (RBO) is gaining popularity among other traditionally used cooking oils because of its better cooking quality, prolonged shelf life and well-balanced fatty acid composition as well as the presence of many antioxidant components. RBO has lower viscosity and relatively high smoke point, which make it as healthy cooking oil. RBO is rich in vitamin E (both tocopherols and tocotrienols) and bioactive phytonutrients, which include phytosterols, γ-oryzanol, squalene and triterpene alcohols. All of these compounds exhibit high antioxidant, anti-inflammatory, hypocholesterolaemic, antidiabetic and anticancer activities. The dietary intake of RBO has been reported to lower the levels of blood cholesterol, blood pressure and blood glucose and can help to reduce inflammation and symptoms of metabolic syndrome. RBO helps to boost the immune system and prevent the process of premature ageing and age-related neurodegenerative diseases. Because of its cardiac-friendly phytochemicals and antioxidant potentials, RBO has been categorized as healthy edible oil for human consumption and has attained the status of “heart-healthy oil”. As per scientific evidences, it is suggested that a daily intake of 50 g of RBO besides dietary and lifestyle modifications may be considered enough to attain its beneficial effects in reducing the risk of chronic diseases, in particular the cardiovascular diseases. This chapter discusses the nutritional and phytochemical components of RBO, their mechanism of action as well as health benefits in the prevention and management of chronic diseases.

A study on acid-catalyzed transesterification of crude rice bran oil for biodiesel production

Abstract: Biodiesel is a renewable, biodegradable and nontoxic fuel for diesel engines. It is derived from oils and fats by transesterification with alcohols. As alternative fuel biodiesel has attracted considerable attention during the past decades. The main hurdle to the commercialization of biodiesel is the cost of raw materials. The high value of soybean oil or canola oil as a food product makes production of a cost-effective fuel very challenging. Use of edible oils as biodiesel feedstock cost about 60-70% of raw material cost. Nonedible, inexpensive, low-grade oils with value added byproducts is utmost important to make the biodiesel production economical. Rice bran oil ranks first among the non-conventional, inexpensive, low-grade vegetable oils. Furthermore, crude rice bran oil is a rich source of high value-added byproduct. Therefore, use of rice bran oil as raw material for the production of biodiesel not only makes the process economical but also generates value added bio-active compounds. Isolation and purification of these byproducts make the process attractive and remunerative.In the present investigation a systematic studies of transesterification of high free fatty acid rice bran oil was carried out to establish optimal reaction condition. It was found that acid-catalyzed methanolysis of fatty acids are faster than pure triglycerides or pure triglycerides plus 5% water. More than 99% of FA were converted to their corresponding FAME with 20 min of reaction times at temperature of boiling point of methanol otherwise almost for 6 hours reaction none of TG were converted. Effect of chain length and unsaturation of fatty acid on rate of esterification of fatty acid with methanol are equally reactive irrespective of difference in their chemical structures. Fatty acids from different sources shows similar conversions and change in the fatty acids composition has no effect on rate of methanolysis.

Use of rice-bran oil in the compounding of styrene butadiene rubber

Abstract: The compounding of rubber involves mixing of activator, co-activator, accelerator, antioxidant, filler, processing aid, vulcanizing agent, etc., to produce the rubber. The replacement of three of the above ingredients by rice-bran oil in the compounding of styrene butadiene rubber has been investigated. The higher fatty acids and phenols present in rice-bran oil act as co-activator and antioxidant, respectively, in the vulcanization process. Addition of this oil together with fillers, also meets the requirement of processing aid. The results obtained were compared with those obtained with reference mixes containing stearic acid, styrenated phenol and aromatic/napthenic oil in carbon-black and silica-filled systems. Evaluation of the cure characteristics of the mixes indicates that substitution of the above ingredients with rice-bran oil did not affect the cure properties. Vulcanizates containing the rice-bran oil also showed physical properties comparable to the reference mixes. Processability studies using a plasticorder also showed similar trends. Considering the fact that rice-bran oil is cheaper than other conventional oils used as processing aids in rubber compounding, this non-toxic natural oil can be advantageously used in rubber product manufacture.

Rice bran oil refinement and byproduct production method

Abstract: The invention relates to a rice bran oil refinement and byproduct production method, and solves the problems of poor quality, low product and byproduct yield, low purity, complex technique, small production scale and the like in the existing product oil refined from rice bran oil. The technical scheme is as follows: the method comprises the following steps: carrying out acid/salt combined degumming on rice bran raw oil, dewaxing at low temperature, decolorizing, deacidifying/deodorizing, and degreasing by winterization to obtain tertiary rice bran oil and byproducts (crude wax cake, mixed fatty acids and solid grease). The technique provided by the invention is simple to control, can stably obtain Chinese standard tertiary rice bran oil and byproducts thereof, and can implement large-scale production.