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| 精炼工艺条件对菜籽油活性物质的影响 |
| Effect of refining process on active substance of rapeseed oil |
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| DOI： |
| 中文关键词: 菜籽油 精炼 活性物质 生育酚 甾醇 |
| 英文关键词:rapeseed oil refining active substance tocopherol sterol |
| 基金项目:江苏省研究生科研创新项目（SJCX18_0423）;国家重点研发计划专项课题（2016YFD0400206） |
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| 中文摘要: |
| 以“秦优十号”油菜籽为原料压榨制备菜籽油，分析不同精炼条件下菜籽油中甾醇、生育酚保留率的变化情况，并对实验室条件下的精炼工艺条件进行优化。结果表明：以保留生育酚和甾醇为目的的脱胶最佳工艺条件为温度60 ℃，磷酸添加量0.2%，加水量4%，时间30 min；脱酸最佳工艺条件为碱液质量分数11.06%，时间30 min，初温30 ℃，终温40 ℃；脱色最佳工艺条件为活性白土添加量3.5%，时间20 min，温度85 ℃；脱臭最佳工艺条件为温度220 ℃，时间80 min，压力400～500 Pa。在最佳条件下，生育酚保留率为68.15%，甾醇保留率为79.49%，油脂损耗为4.9%。与传统精炼工艺相比，优化后的精炼工艺条件下甾醇和生育酚保留率得到提升，油脂损耗没有明显变化。 |
| 英文摘要: |
| The “Qinyou No.10” rapeseed was used as raw material to prepare rapeseed oil. The changes of sterol and tocopherol contents in rapeseed oil in different refining processes were analyzed, and the refining process under laboratory was optimized.The results showed that the optimal degumming process conditions for the purpose of preserving tocopherol and sterol were obtained as follows: temperature 60 ℃, phosphoric acid dosage 0.2%, water dosage 4% and time 30 min.The optimal deacidification process conditions were obtained as follows: alkali mass fraction 11.06%, time 30 min, the initial temperature 30 ℃ and the final temperature 40 ℃.The optimal bleaching process conditions were obtained as follows: active clay dosage 3.5%, time 20 min and temperature 85 ℃.The optimal deodorization process conditions were obtained as follows: temperature 220 ℃, time 80 min and pressure 400-500 Pa.Under these conditions, the retention rates of tocopherol and sterol were 68.15% and 79.49% respectively, and the oil loss rate was 4.9%.Compared with the traditional refining process, the optimal refining process improved the retention rates of sterol and tocopherol, and the oil loss rate did not change significantly. |
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