Cottonseed as raw material was processed by two-phase solvent extraction.Non-toxic crude protein was produced, and at the same time the nonpolar solution containing high quality crude cottonseed oil was used for trans...Cottonseed as raw material was processed by two-phase solvent extraction.Non-toxic crude protein was produced, and at the same time the nonpolar solution containing high quality crude cottonseed oil was used for transesterification reaction with methanol to produce fatty acid ester and glycerol.The effect of mass ratio of petroleum ether to crude cottonseed oil on the fatty acid ester content and the quantity of water needed for washing the product were investigated.It was confirmed that the best mass ratio of petroleum ether to crude cottonseed oil was 3.Under this condition, the water consumption was halved.The effect of methanol/oil molar ratio, catalyst amount, reaction temperature and time were also studied.Through orthogonal analysis, the optimum conditions were obtained as follows: the molar ratio of methanol to oil 6∶1, the amount of catalyst 1.1%, reaction temperature 60℃ and reaction time 120 min.The results of parallel tests showed that under such optimum condition the cottonseed oil conversion could reach 97.7%.展开更多
To evaluate the effect of two liquid phase on the separation of musks mixture, the phase equilibria of musk ketone + musk xylene + dimethyl sulfoxide + heptane system were studied for the first time The whole and ever...To evaluate the effect of two liquid phase on the separation of musks mixture, the phase equilibria of musk ketone + musk xylene + dimethyl sulfoxide + heptane system were studied for the first time The whole and every part of the phase equilibrium for the quaternary system were shown by three dimensional phase diagrams, the liquid liquid equilibria, solid liquid equilibria and solid liquid liquid equilibria of the quaternary system were also shown As a result, the compositions of musks in the equilibrium liquid phases were different from those in the feed, that is, musk ketone was enriched in dimethyl sulfoxide phase while musk xylene was enriched in heptane phase So these equilibrium liquid phases were useful in separating musk ketone and musk xylene On the basis of these results, a new process“two liquid phase extractive crystallization”was proposed to separate the eutectics of musk ketone and musk xylene.展开更多
用双液相萃取工艺处理后的棉籽粕为原料,乙醇-水溶液为溶剂进行了棉子糖的提取试验,并考察了影响浸出率的因素。在单因素实验的基础上,通过正交实验得出优化后的提取工艺条件为:乙醇体积分数为70%,提取温度60℃,提取时间150 m in,物料...用双液相萃取工艺处理后的棉籽粕为原料,乙醇-水溶液为溶剂进行了棉子糖的提取试验,并考察了影响浸出率的因素。在单因素实验的基础上,通过正交实验得出优化后的提取工艺条件为:乙醇体积分数为70%,提取温度60℃,提取时间150 m in,物料溶剂比1∶14(即每克物料需14 mL溶剂)。在此工艺条件下,棉子糖的浸出率为92.5%。展开更多
文摘Cottonseed as raw material was processed by two-phase solvent extraction.Non-toxic crude protein was produced, and at the same time the nonpolar solution containing high quality crude cottonseed oil was used for transesterification reaction with methanol to produce fatty acid ester and glycerol.The effect of mass ratio of petroleum ether to crude cottonseed oil on the fatty acid ester content and the quantity of water needed for washing the product were investigated.It was confirmed that the best mass ratio of petroleum ether to crude cottonseed oil was 3.Under this condition, the water consumption was halved.The effect of methanol/oil molar ratio, catalyst amount, reaction temperature and time were also studied.Through orthogonal analysis, the optimum conditions were obtained as follows: the molar ratio of methanol to oil 6∶1, the amount of catalyst 1.1%, reaction temperature 60℃ and reaction time 120 min.The results of parallel tests showed that under such optimum condition the cottonseed oil conversion could reach 97.7%.
文摘To evaluate the effect of two liquid phase on the separation of musks mixture, the phase equilibria of musk ketone + musk xylene + dimethyl sulfoxide + heptane system were studied for the first time The whole and every part of the phase equilibrium for the quaternary system were shown by three dimensional phase diagrams, the liquid liquid equilibria, solid liquid equilibria and solid liquid liquid equilibria of the quaternary system were also shown As a result, the compositions of musks in the equilibrium liquid phases were different from those in the feed, that is, musk ketone was enriched in dimethyl sulfoxide phase while musk xylene was enriched in heptane phase So these equilibrium liquid phases were useful in separating musk ketone and musk xylene On the basis of these results, a new process“two liquid phase extractive crystallization”was proposed to separate the eutectics of musk ketone and musk xylene.
文摘采用微波辅助石油醚/乙醇双液相萃取技术提取樟芝发酵液中的挥发油,并考察了其对7种皮肤癣菌的最低抑制浓度(MIC)。优化的提取条件为:乙醇体积浓度56%,石油醚体积浓度30%,固液比1∶50,微波功率380 W,微波时间90 s。此时,挥发油的提取率为0.69%,真菌MIC为5-20 m L/L。微波辅助双液相萃取挥发油耗时短,提取率高,且获得的挥发油抗皮肤癣菌效果显著。
文摘用双液相萃取工艺处理后的棉籽粕为原料,乙醇-水溶液为溶剂进行了棉子糖的提取试验,并考察了影响浸出率的因素。在单因素实验的基础上,通过正交实验得出优化后的提取工艺条件为:乙醇体积分数为70%,提取温度60℃,提取时间150 m in,物料溶剂比1∶14(即每克物料需14 mL溶剂)。在此工艺条件下,棉子糖的浸出率为92.5%。
