The Process Extraction Of Oil From Xanthoceras Sorbifolia Bunge.Seed Kernels And Its Quality Evaluation

The xanthoceras sorbifolia bunge is a cash crop against drought and cold whichis mainly grown in most regions of north China. Linoleic acid, oleic acid and otherunsaturated fatty acid content in the X.sorbifolia oil is very high so it has richnutritional value. The oil contains a variety of antioxidants; it can be used as naturalantioxidant compounds to the development and utilization and has great potential formarket development. To tap its potential in new oil industry, this paper preliminarydiscussed oil extraction technology and its physical and chemical properties.?1?MicrowaveAssisted Salt-water System Extract OilUsing microwave assisted salt-water system extract oil of xanthoceras sorbifoliabunge. Through single factor experiment analysis and response surface analysisexperimental process conditions is optimized, and get the better process conditions:microwave power300w, the ratio of liquid to raw material4:1, NaCl concentration24g/L, and extracting time80min. In this condition, the oil yield can reach86.55%.The results of GC-MS analysis shows that the content of linoleic acid is47.35%andoleic acid is27.25%in this oil, the oil has the very high nutritional value.?2?Ultrasound-Assisted and Enzyme Hydrolysis Extract OilX.sorbifolia oil extraction by ultrasonic and NaCl demulsification assist aqueousenzymatic method mainly test the effect of ultrasound and NaCl to demulsification. Itfinds that ultrasound and NaCl demulsification have a larger impact todemulsification. A small amount of NaCl can effectively reduce the emulsification.Experimental process conditions were optimized through single factor experimentanalysis and response surface design. At the microwave power150w and extractingtime120min, get the better process conditions: NaCl concentration10g/L, the ratio ofliquid to raw material3.5:1, enzyme solution temperature30?. In this best condition,the oil yield can reach89.85%.?3?Double Enzyme Coupling Method of Salt Extract OilX.sorbifolia oil is extracted by double enzyme coupling method of salt.Experimental process conditions were optimized through single factor experimentanalysis and response surface design. At enzyme solution temperature50?and NaCl concentration of25g/L, get the better process conditions: a-amylase content0.70%,papain adding quantity0.20%, extracting time120min, the ratio of liquid to rawmaterial3.5:1. In this best condition, the oil yield can reach47.67%.?4?Physical and Chemical Properties of X.sorbifolia OilBy acid value, peroxide value, etc, it can be seen that the X.sorbifolia oil have noqualitative change. Antioxidant activity of X.sorbifolia oil test show that X.sorbifoliaoil has strong scavenging effect in vitro antioxidant system. At the condition of20?,the shelf-life of microwave assisted salt-water system extract oil is5312.97h; theshelf-life of ultrasound-assisted and enzyme hydrolysis extract oil is5312.97h; theshelf-life of double reagents by enzyme linking extract oil is5312.97h. At theconditionof25?, the shelf-life is respectively3663.64h,4607.87h,3835.88h.Based on the above three extraction methods they respectively have advantagesand disadvantages:double reagents by enzyme linking extracting method is simple tooperate but low oil yield,85.03%, and the price of enzyme is expensive; ultrasound-assisted and enzyme hydrolysis extracting method could get higher oil yield,89.85%,but relatively high cost; microwave assisted salt-water system extracting method, oilyield reach86.55%, relatively low cost, no organic solvent, is green and high-efficiency. Compared with the above three extraction methods, microwave assistedsalt-water system extracting method is the most preferable.