A kind of processing method of rapeseed oil
A processing method and technology of rapeseed oil, applied in the direction of fat oil/fat production, fat oil/fat refining, fat production, etc., can solve the problem of increased consumption of raw and auxiliary materials for rapeseed oil refining, low trans fatty acid production, and loss of neutral oil Increase and other problems, to achieve the effect of simplifying the deacidification process of conventional alkali refining, reducing the water consumption of degumming, and reducing the loss of neutral oil
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[0021] Step 1. Preparation of crude rapeseed oil: crude rapeseed oil is obtained by pressing or leaching from double-low rapeseed. The main indicators of the crude rapeseed oil are as follows: the phosphorus content is 0.62%, and the oleic acid in the fatty acid composition is 51-70%, linoleic acid 15-30%, linolenic acid 5-14%, vitamin E 70-90mg / 100g, phytosterol 0.4-0.5%;
[0022] Step 2, subjecting the rapeseed crude oil prepared in step 1 to ultrasonic-assisted phospholipase C degumming treatment, the ultrasonic-assisted phospholipase C degumming treatment process is: heating the prepared rapeseed crude oil to 60-70°C, Add a citric acid solution with an oil weight of 0.09-0.12% and a concentration of 45%. After homogeneous mixing, stir at 45°C and keep it warm for 25-35 minutes, then add phospholipase C with a concentration of 0.1%. The oil weight is 12-16mL / kg. After homogeneous mixing, add soft water with an oil weight of 2-4%, and assist degumming at an ultrasonic freque...
Embodiment 1
[0027] Heat the prepared rapeseed crude oil to 60°C, add a citric acid solution with an oil weight of 0.1% and a concentration of 45%, after homogeneous mixing, stir at 45°C and keep it warm for 30 minutes, then add a % phospholipase C, and the addition amount is 16mL / kg of the oil weight. After homogeneous mixing, add soft water with 2% oil weight, and assist degumming under the condition of ultrasonic frequency of 53KHz for 1.5 hours. At 4500r / min, centrifuge for 20 minutes to obtain oil feet and degummed rapeseed oil; heat the degummed rapeseed oil to 75°C, add phosphoric acid with an oil weight of 0.03% and a concentration of 75%, and stir after homogeneous mixing And keep warm for acid reaction for 15 minutes, cool down to 40°C and then add lye with a concentration of 10%, stir and keep warm for 40 minutes for mixed reaction, after the reaction is completed, get soapstock and primary deacidified rapeseed oil by centrifugal separation , the primary deacidified rapeseed oil...
Embodiment 2
[0029] Heat the prepared rapeseed crude oil to 70°C, add a citric acid solution with an oil weight of 0.12% and a concentration of 45%, after homogeneous mixing, stir at 45°C and keep it warm for 25 minutes, then add a % phospholipase C, and the addition amount is 12mL / kg of the oil weight. After homogeneous mixing, add soft water with 4% oil weight, and assist degumming for 2.0 hours under the condition of ultrasonic frequency of 53KHz. Centrifuge at 5000r / min for 30 minutes to obtain oily feet and degummed rapeseed oil; heat the degummed rapeseed oil to 80°C, add phosphoric acid with an oil weight of 0.04% and a concentration of 75%, and stir after homogeneous mixing And keep it warm for acid reaction for 15 minutes, cool down to 40°C, add lye with a concentration of 14%, stir and keep warm for 45 minutes of mixed reaction, after the reaction is completed, get soapstock and primary deacidified rapeseed oil by centrifugation , the primary deacidified rapeseed oil was vacuum-d...
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