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.

Rice bran oil dewaxing process

Abstract: The present invention discloses a rice bran oil dewaxing process, wherein the rice bran oil has the high wax content, and a dewaxing and degreasing double-stage winterization process is adopted. According to the process, the dewaxing process temperature is about 16-18 DEG C, and the degreasing process temperature is about 5 DEG C, such that the bran wax has the low oil content; after crude oil is heated, the solid impurity is removed through filtration with a fine filter, and the obtained material enters a crystallization tank to carry out crystallization and crystal cultivating; and the heat of the edible oil is replaced through a refrigerant with a freezer so as to achieve solid-liquid separation of the bran wax crystal and the edible oil, the high position tank high position pressure difference is adopted so as not to break the crystal grains, and the press-in thermal unloading type filter is adopted to carry out solid-liquid separation so as to achieve the large-scale production mode.

The Occurrence and Biological Activity of Ferulate-Phytosterol Esters in Corn Fiber and Corn Fiber Oil

Abstract: Corn fiber is a pericarp-rich fraction obtained during the processing of corn via “wetmilling.” Wet milling of corn is used by all companies that produce corn starch and corn sweeteners, and by many companies that produce fuel ethanol from corn. All commercial “corn oil” is prepared by the extraction of only the germ fraction of the kernel. In contrast, extraction of corn fiber with hexane yielded an oil (comprising about 1.2 wt% of the fiber) which we termed “corn fiber oil.” This oil xontained ferulate-phytosterol esters, similar in structure to “oryzanol,” a cholesterol-lowering substance found in rice bran and rice bran oil. The oil extracted from corn fiber contained high levels of ferualte-phytosterol esters (6.0 wt%), which is about 4-fold higher than their levels in rice bran oil. Corn fiber oil also contains free phytosterols (2.2 wt%) and phytosterol fatty acyl esters (6.8 wt%)

Micronutrients in Rice Bran Oil

Abstract: Rice bran oil (RBO) is a very good source of several micronutrients and natural antioxidants such as γ-oryzanol, sterols, tocopherols, tocotrienols, phospholipids, phytosterols, and squalene. These micronutrients are the bioactive components in RBO, concentrated mainly in the unsaponifiable fraction of the oil. They are often lost to a large degree in the refining process and concentrated in a number of byproducts/residues such as gum and soap stock, deodorizer distillate, and wax from both physical and chemical refining process. RBO producers have paid attention to the recovery of these micronutrients by either avoiding its loss into the byproducts or extracting it from the byproducts for further applications in food, medicinal, pharmaceutical, or cosmetic industries. Several methods such as solvent extraction and crystallization, supercritical fluid extraction, saponification, esterification, and molecular distillation are used for their recovery. In this chapter, the various micronutrients, structure, properties, extraction, and utilization are discussed.

An Efficient Method for the Production of Biodiesel from Rice Bran

Abstract: A modified in situ esterification was employed for the economic competitiveness of biodiesel production from rice bran. The effects of methanol to rice bran ratio, acid catalysts, and reaction time on the biodiesel yield and purity were investigated. Biodiesel yield and purity of 17.99% and 67.04%, respectively, were obtained used acid catalyst (H2SO4) of 2.37%, ratio of methanol and rice bran of 15 (mL/g), and 5 h of reaction time. Recovery of crude biodiesel obtained was 92.45%. Based on the proposed method, the production process of biodiesel could be simplified and improved; therefore, the production cost probably could be reduced further.