Study On Extraction Of Pepper By Supercritical Carbon Dioxide And Antioxidation Of Pepper Extraction

Pepper seeds contain volatile oil, resins, piperine, fat, protein, etc. Pepper oil is a substance of high economic value, which has high medicinal value and consumption value. Pepper oleoresin functional anti-oxidation corrosion resistance and is important in the food additives industry. Traditionally, extracting pepper oil and resin using the solvent extraction method. This means that there is a certain element of the effective destruction, and also residual solvents. It is quite unfavorable to the development of new products.Supercritical fluid extraction technology is a new high efficiency and clean separation technology. With its "natural, nutrition, return to nature" up surge in the extraction of natural products, SCFE occupied a unique position in the field and attracted attentions.This paper based pepper as raw materials, using supercritical carbon dioxide extracted pepper oil and resin and piperine. Further studied and discussed the suitable technology conditions.When oil in storage and using, the unsaturated fatty acids which acted by air, light, enzyme, metal ions, automatically happen oxidation action and lead to the change of oil quality. Basically, the traditional used of synthetic antioxidants are added to increase the stability of oil, thereby prolong their shelf life. With the improvement of people's living on health, longevity, people prefer natural products from the nature. Therefore, people have been seeking the natural antioxidants which are safer and efficient. Natural antioxidants replacing synthetic antioxidants are trend of the development in the food industry. In the future, development of practical and efficient, low-cost natural antioxidants is the focus of natural antioxidants.The paper showed the pepper oil and resin extraction conditions, inspected the extraction temperature, the extraction pressure, the release temperature, particle size on the rate of pepper extract natural resources through single factor experiments. Through orthogonal test and verification test determined the optimum conditions. To enhance the value of pepper, access to more variety of products, added appropriate amount of cosovent to the pure carbon dioxide to enhance its solubility of polar extraction, hard-extracted piperine.The anti-oxidative activity of the pepper extract was investigated for edible oils. Results show that pepper extract of a certain antioxidant with peanut oil and lard, But pepper extract have superior anti-oxidative activity in lard than in peanut oil, that is pepper extract is applicable to the low fat content of polyunsaturated fatty acids. In the concentration range of experiments, the pepper extract antioxidant efficiency increases with the increase of pepper added. In addition, the mixture of citric acid and pepper extract show quite noticeable anti-oxidative effect. Throgh Fenton system, studied the free radical scavenging ability of pepper extract. It indicated that the pepper extract showed stronger ability to scavenge hydrogen peroxide.Choosed a mathematical simulated the extraction process. Using a Step-by-step extraction kinetic model, which is based on differential mass conservation. This model full account of the solid phase and the fluid phase mass transfer resistance, to be more accurate simulation of the supercritical fluid extraction of solid materials extraction process. The model was first used to simulate supercritical fluid extraction of pepper oil and resin process. The average relative absolute error is less than 7%, with sufficient precision.