目的:优选水蒸气蒸馏法提取罗勒挥发油的最佳工艺。方法:在单因素实验为基础的条件下,以挥发油提取率为评价指标,以浸泡时间、蒸馏时间、加水量为考察因素,采用L9(34)正交试验优选罗勒挥发油提取的最佳工艺。结果:水蒸气蒸馏法提取罗勒...目的:优选水蒸气蒸馏法提取罗勒挥发油的最佳工艺。方法:在单因素实验为基础的条件下,以挥发油提取率为评价指标,以浸泡时间、蒸馏时间、加水量为考察因素,采用L9(34)正交试验优选罗勒挥发油提取的最佳工艺。结果:水蒸气蒸馏法提取罗勒挥发油的最佳工艺流程为加水量400 m L,浸泡时间6h,蒸馏时间为2 h。结论 :优化的罗勒挥发油提取工艺合理可行。展开更多
[Objectives] To optimize volatile oil extraction from Ocimum basilicum with the water vapor distillation. [Methods] An orthogonal design was carried out to determine the volume of volatile oil by 3 factors: the immers...[Objectives] To optimize volatile oil extraction from Ocimum basilicum with the water vapor distillation. [Methods] An orthogonal design was carried out to determine the volume of volatile oil by 3 factors: the immersion time, distillation time, amount of water. The ratio of the oil in inclusion complex was used to evaluate the technology based on the orthogonal design. [Results] The best volatile oil extraction condition was to add 400 mL of water into the mixture of crude drugs, and to extract the herbal medicine for 2 h with advanced soaking for 6 h with water. [Conclusions] The process is stable, reasonable, and feasible.展开更多
Traditional distillation(TD)is generally an energy-intensive and inefficient process for separation and purification of liquids in chemical industries.Herein,we developed an interface-enhanced distillation(IED)by empl...Traditional distillation(TD)is generally an energy-intensive and inefficient process for separation and purification of liquids in chemical industries.Herein,we developed an interface-enhanced distillation(IED)by employing a well-arranged membrane of reduced graphene oxide(rGO)sheet arrays embedded with silicon dioxide nanofibres(rGO/SiO2)as the evaporation intermediate layer on the liquid surface.This IED enlarges the evaporation surfaces and weakens the intermolecular forces on the liquid/solid/gas interfaces,realizing the fast and even low temperature fraction collection with less energy consumption.The IED delivers evaporation rates 200%–300%times that of TD,meanwhile having an energy saving of 40%–60%and a time saving of 50%–70%for diverse liquid feeds.In atmospheric IED manner,high boiling point and perishable organics can be collected with high quality at a temperature lower than their boiling points.This IED provides an innovative strategy for highly efficient distillation in chemical industries.展开更多
文摘目的:优选水蒸气蒸馏法提取罗勒挥发油的最佳工艺。方法:在单因素实验为基础的条件下,以挥发油提取率为评价指标,以浸泡时间、蒸馏时间、加水量为考察因素,采用L9(34)正交试验优选罗勒挥发油提取的最佳工艺。结果:水蒸气蒸馏法提取罗勒挥发油的最佳工艺流程为加水量400 m L,浸泡时间6h,蒸馏时间为2 h。结论 :优化的罗勒挥发油提取工艺合理可行。
基金Supported by Key Natural Science Research Project of Higher Learning Institutions in Anhui Province in 2018(KJ2018A0884)the Natural Science Research Program of Anhui Colleges and Universities in 2017(KJ2017A772)
文摘[Objectives] To optimize volatile oil extraction from Ocimum basilicum with the water vapor distillation. [Methods] An orthogonal design was carried out to determine the volume of volatile oil by 3 factors: the immersion time, distillation time, amount of water. The ratio of the oil in inclusion complex was used to evaluate the technology based on the orthogonal design. [Results] The best volatile oil extraction condition was to add 400 mL of water into the mixture of crude drugs, and to extract the herbal medicine for 2 h with advanced soaking for 6 h with water. [Conclusions] The process is stable, reasonable, and feasible.
基金This work was supported by the Ministry of Science and Technology of China(2016YFA0200200 and 2017YFB1104300)the National Science Foundation of China(51673026,51433005 and 21805160)+1 种基金NSFC-MAECI(51861135202),NSFC-STINT(21911530143)and Beijing Natural Science Foundation(2152028).Computations were carried out on the“Explorer 100”cluster system of Tsinghua National Laboratory for Information Science and Technology.
文摘Traditional distillation(TD)is generally an energy-intensive and inefficient process for separation and purification of liquids in chemical industries.Herein,we developed an interface-enhanced distillation(IED)by employing a well-arranged membrane of reduced graphene oxide(rGO)sheet arrays embedded with silicon dioxide nanofibres(rGO/SiO2)as the evaporation intermediate layer on the liquid surface.This IED enlarges the evaporation surfaces and weakens the intermolecular forces on the liquid/solid/gas interfaces,realizing the fast and even low temperature fraction collection with less energy consumption.The IED delivers evaporation rates 200%–300%times that of TD,meanwhile having an energy saving of 40%–60%and a time saving of 50%–70%for diverse liquid feeds.In atmospheric IED manner,high boiling point and perishable organics can be collected with high quality at a temperature lower than their boiling points.This IED provides an innovative strategy for highly efficient distillation in chemical industries.
