Rice bran oil deodorization process

Rice bran oil deodorization process

In common, the terrible smell of the crude rice bran oil will affect the oil storage and price. In the rice bran oil deodorization process, we remove off some terrible flavor substances by means of steam distillation in the process of high temperature and high vacuum conditions. And the rice bran oil deodorization process also can be applied to other oil seeds,such as peanut,soybean,etc.

Introduction of rice bran oil deodorization process:

After the decolorized oil pumped to the deodorization pot or the deodorization tower, it begins to heat. When the temperature reaches above 260℃, the direct steam is added to take the odors away. At the same time, the 0.5% moisture in the oil which is produced during rinsing section, needs be took out. Because of high temperature in the rice bran oil deodorization process, the dehydration is also finished at this step.

After that,the final oil will be refined once again through safety filter.

Key factors of rice bran oil deodorization process:

(1) Temperature: Increasing the temperature causes a rapid increase in the vapor pressure of the odor substances  can reduce  the  amount of direct steam, the peroxide is also beneficial in  removal of the decomposition of carotenoid. High temperature for deodorization is favorable, but limited, too much will have adverse effects.

(2) Vacuum: Vacuum high, you can reduce the amount of direct steam to reduce deodorization time, reduce the loss of fat hydrolysis can be obtained free fatty acids containing low refined oil. There is also help prevent high temperature oxidation grease.  Generally use three steam jet pump, if necessary, available four steam jet pumps.

(3) Steam rate: If the rate is high, it can shorten the deodorizing time. Empirically derived optimal conditions  deodorized oil  by the  amount of steam was 125 kg / hr.

(4) deodorization time: The Shorter time is better, but also need to remain for some time in the deodorization temperature  (called dwell time)  in order to improve  the stability of oil and fat. Usually intermittent deodorization need 3-8 hours, continuous  deodorization 15 to 20 minutes.

We can supply batch type, semi-continuous and full continuous rice bran oil deodorization process. We can also design and manufacture different rice bran oil deodorization process according to your capacity and requirement.