Supercritical CO2 Extraction Technology in Separation of Zanthoxylum bungeanum Oleoresin
Zanthoxylum bungeanum L. belongs to the genus Zanthoxylum of Rutaceae. It is one of the unique edible spices in China. The volatile oils of Zanthoxylum bungeanum mainly contain olefins, such as limonene, pinene, terpinene, laurelene, pine, basolene, Oriental and eugenol, alcohols, such as linalool, terpineol and alool, ketones, such as pepper Tung and menthol, and aldehydes, epoxides, esters and aromatic hydrocarbons. Essential oil of Zanthoxylum bungeanum is mainly used in food industry. Essential oil and oleoresin of Zanthoxylum bungeanum are used to mix various compound condiments, and can be further processed into microcapsules to prepare various powder compound condiments. In addition, the volatile oil of Zanthoxylum bungeanum also has a strong bactericidal effect. It can be used as fungicide and plant insecticide, and has a broad development and application prospect.
The existing production process of Zanthoxylum bungeanum volatile oil is to obtain Zanthoxylum bungeanum Oleoresin by extracting organic solvents and then concentrating and recovering solvents. There are many factors in the process, such as high operating temperature and residual solvent, which seriously affect the yield and product quality of volatile oil from Zanthoxylum bungeanum, which is not suitable for the current market demand for green products. SFE production process can solve the drawbacks of traditional solvent extraction process. Because the whole production process is carried out at a lower temperature, the products produced can completely retain the unique flavor of raw materials, basically without loss, and there is no solvent residue. It is a green product. The products produced by SFE technology are favored by the market, and the price is much higher than that produced by traditional methods.
Other factors affecting supercritical carbon dioxide extraction of Zanthoxylum bungeanum oleoresin are different flow rates of carbon dioxide, which will affect the final amount of carbon dioxide. However, there are many factors affecting the flow of carbon dioxide, not only depending on the quality of the carbon dioxide gas used, but also related to the production season and the specific conditions of the equipment at that time. It is difficult to achieve the accuracy of the flow of carbon dioxide in terms of the current situation of domestic equipment.
Control, so the company used carbon dioxide flow in the test to determine within a range.
The size of pepper raw material determines the difficulty of carbon dioxide fluid penetration into the raw material, but too small particle size may lead to caking in the extraction tank, which may result in inadequate extraction of some of the raw materials, and may also lead to entrainment of raw materials with the flow of carbon dioxide fluid. Phenomenon. It is found that the sixty mesh size is suitable.
The main components of Zanthoxylum bungeanum L. var. bungeanum L. var. bungeanum L. var. bungeanum L. var. bungeanum L. var. bungeanum L. var. bungeanum L. var. bungeanum L. var. Hancheng Dahongpao var. bungeanum L. var. bungeanum L. var. var. Time is 1 hour. Under these conditions, the extraction rate of Zanthoxylum bungeanum oleoresin is the highest, and most of the components have good extraction effect.
Compared with traditional extraction methods, the yield of oleoresin extracted from Zanthoxylum bungeanum by supercritical carbon dioxide extraction is higher, which can reach 8-10, while the yield of traditional solvent extraction is lower, which is only 6-8. Moreover, the quality of volatile oil from Zanthoxylum bungeanum L. obtained by supercritical carbon dioxide extraction is much better than that obtained by conventional technology, which is transparent and light in color. Supercritical extraction with carbon dioxide has no effect on the natural activity of thermosensitive substances in volatile oil because of its low operating temperature. The aroma of Zanthoxylum oleoresin obtained is closer to the natural aroma. There is no residual organic solvent in the oleoresin. The extracted oleoresin can be directly used in food industry without processing. According to Wuhan Baimu Seasoning Food Co., Ltd., the quality of SFE products is reliable and excellent. Supercritical extraction technology is simple to operate, highly automated, easy to accurately control various indicators, and it takes 2 hours to complete an operation cycle.