Two-step Extraction Method To Extract The Pepper Seeds Bark Oil, Kernel Oil Technology Research

The seeds of Zanthoxylum bungeanum Maxim is a food protein resource and a woody oil plant which is riched in lipid, although its theoretical yield is 20 percent more than the pericarp, it was still discarded and landfilled or burned. Recently, with the rapid growth of Zanthoxylum bungeanum Maxim pericarp production of my country, we have an increasing Zanthoxylum bungeanum Maxim seeds. How to use this discarded resource is a problem to be solved urgently.This article studied the possibility of the new method- Two Step extraction technology from seeds of da hong pao Huajiao and optimized the process of crust and kernel oil extraction and system research the kernel oil dewaxing and deacidification technology.These researches aim at demonstrating and optimizing this new method for industrial production. The main results are as follows:1. The seed oil content of da hong pao Huajiao is 31.70 percent (w/w), includ crust oil 10.00 percent and kernel oil 21.70 percent.2. With extracting crust and kernel oil by edible alcohol,methanol,ethyl acetate,60- 90℃petroleum ether,n-hexane and 6#solvent oil, the extraction rate of 6#solvent oil is h- igher. Besides that, 6#solvent oil is quite cheap and widely used for industrial. So we choo- se 6#solvent oil to extract crust and kernel oil of prickly ash seed.3. Using the new method to extract crust oil, the most important factor is the extraction times. Then, the secondly to fourthly important factor is solvent volume,extraction temper- ature and extraction time. We can get the highest extraction rate of 96 percent when 6# sol- vent oil is 25ml/g under 70℃and 160 min for 3 times. The most yield of oil is 92.90 perc- ent.4. Using the new method to extract kernel oil, the most important factor is the extract- ion times. Then, the secondly to fourthly important factor is solvent volume,extraction te- mperature and extraction time. We can get the highest extraction rate of 97.5 percent when 6# solvent oil is 15ml/g under 60℃and 40 min for 3 times. The most yield of oil is 97.51 percent.5. The wax content and acid value of kernel oil extracting by new method is 2.02g/100gand 41.10 mgKOH/g in turn.6. By comparing the dewaxing rate of solvent method and alkali smelting method, we can see the alkali smelting method is better than the former.7. The most important factor which influencing the dewaxing of kernel oil by alkali smelting method is crystallization temperature. The effect on crystallization time and KOH's concentration is not primary. We can get the highest dewaxing of 81.92 percent when using 0.4mol/L KOH, under 8℃and crystallization for 8h.8. The most important factor which influencing the deacidification of kernel oil is consumption of alkali solution. The effect on concentration of alkali solution and stirring time is not primary. We can get the highest dewaxing of 95.5 percent when using 0.032mol/L NaOH, and consuming 6.55mg/g alkali solution under stirring for 10min.