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| 液体脂肪酶催化制备甘油二酯油连续化工艺研究 |
| Continuous preparation process of diacylglycerol oil catalyzed by liquid lipase |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.230270 |
| 中文关键词: 甘油二酯油 脂肪酶 微通道反应器 工艺优化 |
| 英文关键词:diacylglycerol oil lipase microchannel reactor process optimization |
| 基金项目:郑州市科技协同创新专项重点项目（21ZZXTCX02） |
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| 中文摘要: |
| 旨在强化酶催化大豆油的甘油解反应为甘油二酯油的工业化生产提供技术支持，以大豆油和甘油为原料，液体脂肪酶为催化剂，利用微通道反应器制备甘油二酯油。通过单因素实验考察了液体脂肪酶用量、大豆油与甘油质量比、反应温度、反应时间对反应粗产物中甘油二酯质量分数的影响，设计中试放大实验考察工艺的稳定性，并采用分子蒸馏对中试粗产物进行纯化。结果表明：甘油二酯油制备的最佳工艺条件为液体脂肪酶（10 000 U/mL）用量3%（以大豆油质量计）、大豆油与甘油质量比10∶ 1、反应温度50 ℃、反应时间9.0 s，在此条件下粗产物中甘油二酯的质量分数达44%；经中试实验放大后，粗产物中各组分（游离脂肪酸、单甘酯、甘油二酯和甘油三酯）的质量分数无明显变化，甘油二酯的质量分数为42%，反应可在微通道反应器中连续进行；经分子蒸馏纯化后，产物中甘油二酯的质量分数达到48%。综上，通过微通道反应器可以实现液体脂肪酶催化大豆油甘油解制备甘油二酯油的连续化生产，且该方法稳定性较好。 |
| 英文摘要: |
| In order to enhance the glycerolysis reaction of soybean oil catalyzed by enzyme, and provide technical support for the industrial production of diacylglycerol oil, diacylglycerol oil was prepared by microchannel reactor using soybean oil and glycerol as raw materials and liquid lipase as catalyst. The effects of dosage of liquid lipase, mass ratio of soybean oil to glycerol, reaction temperature and reaction time on the mass fraction of diacylglycerol in the crude product were investigated by single factor experiment. The stability of the process was studied by amplification experiment, and the amplification crude product was purified by molecular distillation. The results showed that the optimal conditions for the preparation of diacylglycerol oil were obtained as follows: dosage of liquid lipase (10 000 U/mL) 3% (on the basis of soybean oil mass), mass ratio of soybean oil to glycerol 10∶ 1, reaction temperature 50 ℃ and reaction time 9.0 s. Under these conditions, the mass fraction of diacylglycerol in the crude product reached 44%. After amplification experiments, there was no significant change in the mass fraction of components (free fatty acid, monoacylglycerol, diacylglycerol, triacylglycerol) in the crude product, with the mass fraction of diacylglycerol 42%, and the reaction could proceed continuously in the microchannel reactor. After molecular distillation purification, the mass fraction of diacylglycerol reached 48%. In conclusion, the continuous preparation process of diacylglycerol oil catalyzed by liquid lipase can be realized by the microchannel reactor, and the method has good stability. |
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