Generally speaking rice bran oil can be extracted by chemical solvents, or pressed directly from rice bran. Here we recommend small capacity rice bran oil projects can choose expelling pressing method, while large capacity take the solvent making technique. We have to mention that hot extraction method which would get more oil yield and purer edible oil than the cold pressing method. When refers to rice bran oil production, the following three processing steps can not be ignored, they are raw material preparation, rice bran oil extraction and crude oil refining.
Rice Bran Raw Material Preparation: Like other oil bearing materials, before making oil from rice husk, these raw materials should have been fully prepared. Rice bran is first screened and then heated by steam at temperature higher than 100 degrees Celsius to stop Lipase hydrolysis in rice bran prior to extraction.
Rice Bran Oil Extraction: You can extract the crude rice bran oil either by mechanical method with oil presses or by chemical method with solvent. After proper preparation, the bran is fully stabilized and sent to an extraction area where oil is removed, yielding two products,a high quality crude rice bran oil and defatted rice bran.
Rice Bran Oil Refining: Crude rice bran oil is further processed by refining, which removes the majority of free fatty acids and provides an oil with minimal processing suitable for a variety of animal or agricultural applications. Edible oil bleaching typically leaves minor flavor and odor compounds that must be removed by steam distillation before packaging; however those customers that require de-waxed oil have their oil go through a de-waxing process before distillation.
Steam distillation is the final step in the edible oil process and it is here that any off flavors and residual free fatty acids left in the oil are removed. Once the oil has been fully processed, it is ready for packaging into retail bottles, food service pails or bulk drums.
Are you interested in getting more about how to produce rice bran oil, or details on establishing rice bran oil processing plant in your country? The following are some photos of a 100TPD Complete Oil Extraction Plant we built for your reference!