| 王 亚,毕艳兰.响应面优化单溶剂体系棉酚提取工艺研究[J].中国油脂,2015,40(8):.[WANG Ya,BI Yanla.Optimization of extraction of gossypol in single solvent system by response surface methodology[J].China Oils and Fats,2015,40(8):.] |
| 响应面优化单溶剂体系棉酚提取工艺研究 |
| Optimization of extraction of gossypol in single solvent system by response surface methodology |
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| DOI： |
| 中文关键词: 游离棉酚 甲醇 提取率 响应面 |
| 英文关键词:free gossypol methanol extraction rate response surface methodology |
| 基金项目: |
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| 中文摘要: |
| 为了降低棉粕的毒性及最大限度地提取棉酚，以棉仁为原料，以甲醇为溶剂，采用溶剂浸出法对棉仁中游离棉酚的提取工艺进行研究。在单因素试验的基础上，通过响应面法对工艺条件进行优化。结果显示各因素影响游离棉酚提取率的主次顺序为：提取时间>料液比>提取温度>搅拌速率；得到的最佳工艺条件为：料液比1∶24，提取温度35℃，提取时间42 min，搅拌速率2 600 r/min，提取次数2次（即先以料液比1∶12提取，提取21 min，再以料液比1∶12提取，提取21 min）；在最佳工艺条件下，游离棉酚的提取率为68.9%±0.81%，其纯度为81.9%±0.85%。此时，棉粕中游离棉酚残留量为839.7 mg/kg，小于饲料卫生标准(GB 13078—2001)中所规定的棉籽饼、粕中允许的游离棉酚最大残留量1 200 mg/kg。 |
| 英文摘要: |
| The extraction of free gossypol from cottonseed kernel by methanol was studied so as to reduce the toxicity of cottonseed meal and extract gossypol efficiently. On the basis of single factor experiment, the extraction conditions were optimized by response surface methodology. The results showed that extraction time had the most significant effect on the extraction rate of free gossypol, followed by ratio of solid to liquid, extraction temperature and stirring rate; the optimal extraction conditions were obtained as follows: ratio of solid to liquid 1∶24, extraction temperature 35℃, extraction time 42 min, stirring rate 2 600 r/min and extraction times twice(first extracting for 21 min with ratio of solid to liquid 1∶12, then also extracting for 21 min with ratio of solid to liquid 1∶12). Under the optimal conditions, the extraction rate and the purity of free gossypol reached 68.9%±0.81% and 81.9%±0.85% respectively, and the residue of free gossypol in cottonseed meal was 839.7 mg/kg, which was lower than the allowed maximum residue of free gossypol 1 200 mg/kg in cottonseed cake and cottonseed meal in hygienical standard for feeds (GB 13078—2001). |
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