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In this study, prickly ash seed oil as the basic raw material , pepper seed oil generally darker , higher acid value , this targeted first pepper seed oil decolorization , re- esterification deacidification pepper seed oil refining Finally, the esterified oil necessary post-processing , refining effect is better . In the study of the bleaching process , activated carbon activated clay as a mixed bleaching agent , focus on activated carbon accounting mixed decolorant proportion , the four mixed amount of bleaching agent , bleaching , bleaching temperature bleaching impact factors , combined with the single factor experiment and response surface optimization test, and eventually come to the the best decolorization conditions : activated carbon accounting mixed decolorant proportion : 15.5% ; the mixed bleaching agent dosage: 2% ; the decolorization time : 22 minutes.le ; the bleaching temperature : 93 ° C , under this condition decolorization rate of 79.71% . Esterification deacidification process , the five traditional esterification catalyst screening, the results show that ZnO catalytic effect . Selected ZnO as the catalyst of the esterification reaction , the esterification reaction time , the temperature of the esterification reaction , ZnO added amount of monoglycerides / glycerol ( 1:1 , w / w ) added amount ScS single factor test and positive post test analysis . By orthogonal experiment with the single factor experiment , considering the impact and economic applicability of reaction temperature on the the esterification oil color , and ultimately determine the optimal esterification conditions : reaction time 6h, esterification temperature of 200 ° C , ZnO 0.2% addition , the dosage of 150% of the theoretical additive amount of monoglycerides / glycerol ( 1:1 , w / w ) , esterified oils obtained under this condition , an acid value of 3.57mgKOH / g , an ester monoglyceride of oil and diacylglycerol content were 3.25 % , 13.64% . Post-processing of the esterified oil is purified triglyceride was purified using the solvent extraction method , the extraction conditions : the extractant using ethanol concentration of 85% ; ethanol solution / oil mixture ( w / w ) ratio of 0.8:1 ; extraction temperature to 40 ° C , the resulting triglycerides , monoglycerides content of 0.88% , diacylglycerol content of 4.62% , acid value dropped to 1.73 mgKOH / g .
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