A kind of processing method of rapeseed oil

Abstract

The invention discloses a processing method of rapeseed oil, which comprises the following steps: step 1, preparation of rapeseed crude oil; step 2, degumming the rapeseed crude oil with ultrasonic-assisted phospholipase C, and after the degumming is completed, degumming Centrifugal separation to obtain degummed rapeseed oil; Step 3, subjecting the degummed rapeseed oil to long-mixed deacidification treatment without water washing to obtain deacidified rapeseed oil; Step 4, adding waste white clay to the deacidified rapeseed oil for pre-decolorization treatment, Obtain the pre-bleached rapeseed oil, then add attapulgite and activated carbon to the pre-bleached rapeseed oil to carry out re-decolorization treatment to obtain re-bleached rapeseed oil; Step 5, deodorize the re-bleached rapeseed oil to obtain finished rapeseed Oil. The processing method of the rapeseed oil is safe and environment-friendly, has the advantages of simple process, convenient operation, low cost and high refining rate, and is suitable for industrial production of rapeseed oil processing.

Description

technical field [0001] The invention relates to the technical field of oil processing, in particular to a processing method of rapeseed oil. Background technique [0002] Rapeseed oil is what we commonly call rapeseed oil, also called coriander oil. It is a transparent or translucent liquid obtained by pressing or leaching the seeds of the cruciferous plant Brassica (that is, rapeseed). It is the most commonly eaten oil in my country. one. Studies have shown that among vegetable oils, rapeseed oil contains the least saturated fatty acids, only 6%, and unsaturated fatty acids account for more than 90%. Therefore, rapeseed oil is beneficial to gallbladder function and also helps to reduce cholesterol in the human body. Rapeseed oil is also rich in vitamin E and oleic acid, linoleic acid, linolenic acid and so on. The human body has a very high digestion and absorption rate of rapeseed oil, and the digestion and utilization rate can reach 99%. Its nutrients can be fully absorb...

AI Technical Summary

Problems solved by technology

For the processing of rapeseed oil, general-purpose refining technology is commonly used in the prior art, which generally has serious over-processing problems, which increases the amount of raw and auxiliary materials used in rapeseed oil refining, increases the consumption and energy consumption of oil refining, and processes waste water. , The discharge of waste residues exceeds the standard, which damages the environment, and also causes the original nutrients in the rapeseed oil to be removed by over-processing, resulting in a decline in the nutritional quality of the rapeseed oil. At the same time, over-processing also makes trans fatty acids in the oil The content of harmful oil accompanying substances increases, which reduces the safety of oil consumption

[0003] In the existing patent CN102293264A "A Moderately Processed Vegetable Oil and Its Preparation Method", a combination of processes such as twice degumming, low-temperature alkali refining, waste clay pre-decolorization-clay decolorization, and combined tower deodorization is used to moderately refine the oil, although This patent adopts twice degumming and low-temperature alkali refining technology, and the effect of degumming and deacidification is better, but consumes a lot of water and produces a lot of wastewater, which increases the difficulty of wastewater treatment, and at the same time, the loss of neutral oil also increases; patent CN102492548A "A new method of producing rapeseed oil based on moderate bleaching clay decolorization and high temperature treatment" first uses clay to remove plant pigments in oil, and then removes heat-sensitive substances in it through high temperature to obtain qualified rapeseed oil. The advantage is that the amount of clay is less , the amount of trans fatty acid generated is low, and the production cost is also appropriately reduced. However, the high-temperature treatment under vacuum makes the vitamin E and phytosterol content in the oil largely removed. Therefore, this method reduces the nutritional quality of the oil. Undesirable; in the patent CN102517142A "a zero-trans fatty acid multi-dimensional primary rapeseed oil and its preparation method", double enzyme degumming / super degumming-no water washing long-mixing deacidification coupling technology, low activity decolorizing agent two One-step decolorization technology, low-temperature short-time / two-stage capture and reflux deodorization technology to achieve moderate processing of rapeseed, thereby producing zero-trans fatty acid multi-dimensional primary rapeseed oil, although the content of trans fatty acid is less and the nutrients are more retained, but The process line is long and has limited applicability

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