Process for preparing rapeseed oil by microwave method

Abstract

The invention discloses a process for preparing rapeseed oil by a microwave method. The process comprises the following steps of (1) seed selection; (2) crushing; (3) soaking; (4) ultrasound treatment; (5) enzyme addition; (6) alkaline extraction; (7) hydrolysis; (8) high-temperature enzyme deactivation; (9) centrifugal separation, and upper layer grease suction; (10) water adding uniform mixing on lower layer emulsion, and secondary ultrasound treatment; (11) mixed liquid regulation to the acid state; (12) segmented vacuum microwave treatment; (13) centrifugation and rapeseed clear oil obtaining. In the process of preparing the rapeseed oil, the twice grease extraction is performed; the clear oil yield is effectively improved; the ultrasound is used for assisting the water enzyme method to process the rapeseeds; the duplex effects of the ultrasound and the enzyme are utilized; the plant cell structure is damaged; the moisture in the rapeseeds is fast vaporized; the dissolute-out of the grease micro particles in the rapeseeds and the formation of porous structures inside plant tissues can be promoted; the oil yield is improved; the ultrasound assisted segmented microwave method isused for performing demulsification process on emulsion generated in the rapeseed oil process by the ultrasound assisted segmented microwave method; the demulsification rate is improved; the high clear oil yield is further improved.

Description

technical field [0001] The invention belongs to the field of vegetable oil processing, in particular to a process for preparing rapeseed oil by a microwave method. Background technique [0002] Rapeseed is an important oil crop in the world, and its output ranks fourth in the world, after soybean, cottonseed and palm. In my country, the planting area and output of rapeseed rank first in the world. As an important oil crop, it is also a crop high in high-quality vegetable protein. The traditional extraction methods of rapeseed oil are pressing and extraction. Among them, the extraction method has been controversial all over the world due to the use of organic solvents such as n-hexane. The organic solvent used in the solvent extraction method not only has a destructive effect on the atmospheric environment, but is also flammable, explosive and extremely unsafe, which endangers the production safety of oil production enterprises. The pressing method not only has a lower oil...

AI Technical Summary

Problems solved by technology

[0004] However, the important problem faced in the process of preparing rapeseed oil by aqueous enzyme method is that most of the oil is tightly combined with protein in the form of emulsion, so it is difficult to extract, and the yield of clear oil is low.

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