A kind of extraction method of sesame oil

Abstract

The invention discloses a sesame oil extraction method. The method comprises the following steps that 1, sesame seeds are cleaned, husked, smashed, subjected to water regulation and then subjected to freezing treatment; 2, microwave defrosting is conducted on the sesame powder subjected to freezing treatment; 3, the defrosted sesame powder is subjected to step-by-step enzymolysis, centrifugal separation is conducted after enzymolysis is completed, and sesame oil, emulsion, hydrolysate and residues are obtained; 4, the emulsion is subjected to ultrasonic treatment, ethyl alcohol is added, centrifugation is conducted, and the sesame oil is obtained. According to the sesame oil extraction method, the high-quality green sesame oil can be obtained, needed equipment is simple, operation is safe, the obtained sesame oil is free of residual solvent, and the final total oil extraction rate can reach 97.91%.

Description

technical field [0001] The invention belongs to the bioprocessing technology of grain and oil, in particular to a method for extracting sesame oil. Background technique [0002] Sesame is one of the main oil crops in my country. Its seeds have high oil content. Sesame oil is rich in essential fatty acids, linoleic acid and oleic acid. It is a vegetable oil with high nutritional value. Sesame oil is famous for its rich nutrition and unique flavor. Loved by people. [0003] At present, the preparation methods of sesame oil mainly include water substitution method, mechanical pressing method, leaching method, enzymatic method and so on. Among them, the water substitution method is the most common traditional method for producing sesame oil, the mechanical pressing method and the leaching method are the main methods for industrial production, and the enzymatic method is a new oil extraction method that has been studied more in recent years. The traditional water substitution pr...

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Problems solved by technology

The traditional water substitution process is the steps of clearing seeds, moistening seeds, frying seeds, raising smoke, mixing pulp and stirring oil, and shaking oil separation. %), the degree of mechanization is low, the labor intensity is high, and most of them are based on small workshop production, the degree of automation and continuity is low, and the moisture content of the hemp residue obtained is too high (65% to 70%), which is prone to corruption and deterioration, causing environmental pollution; Due to high temperature roasting, the sesame protein will be severely damaged, resulting in a waste of protein resources

Although the pressing method has a simple process and is easy to realize industrial production, the oil yield is low, the residual oil content of the cake residue is high, the impurity content is high, the process is long, and the energy consumption is large. Oxidation, the quality of the obtained crude oil is poor, the color is dark and easy to deteriorate, the natural nutrients in the oil have been destroyed after roasting, and the equipment is huge; the solvent extraction method has a high oil yield and is easy to operate, but there is a problem of extraction For a long time, the solvents used in the leaching method at this stage are mainly hydrocarbon compounds, mainly hexane. This kind of solvent is flammable and explosive, and has a strong stimulating effect on the human nervous system. Low efficiency, easy to cause waste of resources, high solvent residues in crude oil and other disadvantages; in the enzymatic extraction process, the tissues of oil crops are treated with enzyme preparations to degrade the lignin, cellulose, and hemicellulose that wrap the oil, and make the cells The active ingredients are fully released, and at the same time, the process is simple, the conditions are mild, the energy consumption is low, and the extracted oil has good quality, and because the enzymatic hydrolysis is carried out in the water phase, the phospholipid enters the water phase, so there is no need for degumming. The deep processing and utilization of protein has attracted the attention of many scholars at home and abroad

[0004] So far, there is no freezing-microwave thawing method used as an oil pretreatment method in the oil production process, and the combination of freezing-microwave thawing and water enzymatic method is almost none in the sesame oil extraction process. Aspects of research

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