In ultrasonic extraction technology, optimization of technical parameters often considers extraction medium only, without including ultrasonic parameters. This paper focuses on controlling the ultrasonic extraction pr...In ultrasonic extraction technology, optimization of technical parameters often considers extraction medium only, without including ultrasonic parameters. This paper focuses on controlling the ultrasonic extraction process of puerarin, investigating the influence of ultrasonic parameters on extraction rate, and empirically analyzing the main components of Pueraria, i.e., isoflavone compounds. A method is presented combining orthogonal experi- mental design with a support vector machine and a predictive model is established for optimization of technical parameters. From the analysis with the predictive model, appropriate process parameters are achieved for higher extraction rate. With these parameters in the ultrasonic extraction of puerarin, the experimental result is satisfactory. This method is of significance to the study of extracfing root-stock plant medicines.展开更多
The caustic alkali-free water extraction agents were studied for treating the oil sands excavated from Inner Mongolia, China. Several kinds of chemical reagents were evaluated, among which sodium carbonate(SC), sodium...The caustic alkali-free water extraction agents were studied for treating the oil sands excavated from Inner Mongolia, China. Several kinds of chemical reagents were evaluated, among which sodium carbonate(SC), sodium dodecyl benzene sulfonate(SD) and sodium chloride were confirmed as composite solutes. Their proportion was optimized by an orthogonal test. The optimum proportion of the composite agent covered 0.03% of SD, 0.50% of sodium chloride, 3.00% of SC, with the rest composed of water. The optimal operating condition was also confirmed. The oil sands were extracted at the following optimized conditions: a treating time of 15 min, a temperature of 80 ℃ and an extraction agent/feed ratio of 1:1, with the bitumen yield reaching more than 96%. The extraction agent after separation from the bitumen product can be recycled for reuse to carve out a good environmentally friendly route.展开更多
基金Supported by the National Natural Science Foundation of China(21146009,21376014)
文摘In ultrasonic extraction technology, optimization of technical parameters often considers extraction medium only, without including ultrasonic parameters. This paper focuses on controlling the ultrasonic extraction process of puerarin, investigating the influence of ultrasonic parameters on extraction rate, and empirically analyzing the main components of Pueraria, i.e., isoflavone compounds. A method is presented combining orthogonal experi- mental design with a support vector machine and a predictive model is established for optimization of technical parameters. From the analysis with the predictive model, appropriate process parameters are achieved for higher extraction rate. With these parameters in the ultrasonic extraction of puerarin, the experimental result is satisfactory. This method is of significance to the study of extracfing root-stock plant medicines.
文摘The caustic alkali-free water extraction agents were studied for treating the oil sands excavated from Inner Mongolia, China. Several kinds of chemical reagents were evaluated, among which sodium carbonate(SC), sodium dodecyl benzene sulfonate(SD) and sodium chloride were confirmed as composite solutes. Their proportion was optimized by an orthogonal test. The optimum proportion of the composite agent covered 0.03% of SD, 0.50% of sodium chloride, 3.00% of SC, with the rest composed of water. The optimal operating condition was also confirmed. The oil sands were extracted at the following optimized conditions: a treating time of 15 min, a temperature of 80 ℃ and an extraction agent/feed ratio of 1:1, with the bitumen yield reaching more than 96%. The extraction agent after separation from the bitumen product can be recycled for reuse to carve out a good environmentally friendly route.