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| Application of novel supported catalyst in synthesis process of phytosterol ester |
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| KeyWord:sterol ester catalyst copper oxide-nano hydroxyapatite reuse |
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| Abstract: |
| A novel and high efficient copper oxide-nano hydroxyapatite （CuO-NHAP） catalyst was developed. The properties of supported catalyst（specific surface area, pore structure、mcro-morphology and crystal structure） were characterized and the process parameters of synthesis of plant sterol ester with plant sterol and fatty acid catalyzed by CuO-NHAP were optimized. The results showed that the CuO-NHAP catalyst was prepared effectively by pores-broading of nano-hydroxyapatite with vapour, impregnation with Cu（NO3）2 and calcination. The optimal conditions of esterfication were obtained as follows：dosage of catalyst 0.6%, molar ratio of oleic acid to phytosterol 1.4∶?1, reaction temperature 160?℃ and reaction time 6 h. Under these conditions, the esterification rate was 99.3%. When the catalyst was reused for six times, its activity kept more than 85%. |
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