The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Jutitorn Laohaphornchaiphan - One of the best experts on this subject based on the ideXlab platform.
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Batch Simulation of Multistage Countercurrent Extraction of Uranium in Yellow Cake from Monazite Processing with 5% TBP/Kerosene☆
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
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batch simulation of multistage Countercurrent Extraction of uranium in yellow cake from monazite processing with 5 tbp kerosene
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
Uthaiwan Injarean - One of the best experts on this subject based on the ideXlab platform.
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Batch Simulation of Multistage Countercurrent Extraction of Uranium in Yellow Cake from Monazite Processing with 5% TBP/Kerosene☆
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
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batch simulation of multistage Countercurrent Extraction of uranium in yellow cake from monazite processing with 5 tbp kerosene
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
Pipat Pichestapong - One of the best experts on this subject based on the ideXlab platform.
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Batch Simulation of Multistage Countercurrent Extraction of Uranium in Yellow Cake from Monazite Processing with 5% TBP/Kerosene☆
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
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batch simulation of multistage Countercurrent Extraction of uranium in yellow cake from monazite processing with 5 tbp kerosene
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
Prartana Kewsuwan - One of the best experts on this subject based on the ideXlab platform.
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Batch Simulation of Multistage Countercurrent Extraction of Uranium in Yellow Cake from Monazite Processing with 5% TBP/Kerosene☆
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
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batch simulation of multistage Countercurrent Extraction of uranium in yellow cake from monazite processing with 5 tbp kerosene
Energy Procedia, 2014Co-Authors: Uthaiwan Injarean, Pipat Pichestapong, Prartana Kewsuwan, Jutitorn LaohaphornchaiphanAbstract:In the processing of monazite ore to separate uranium, thorium and rare earth elements composed in the ore, uranium is first extracted and precipitated in the form of sodium diuranate (Na2U2O7) or yellow cake. This yellow cake requires further purification to remove thorium and traces of rare earth impurities from the cake. The Extraction of uranium in 4 N HNO3 with 5% TBP/kerosene extractant has been studied with a series batchwise Extraction to simulate multistage Countercurrent solvent Extraction. Feed solutions were prepared from yellow cake obtained from the processing of monazite ore which has about 60% purity of uranium. Simulated continuous Countercurrent Extraction with 4, 5 and 6 Extraction stages were carried out. Equilibrium distribution coefficients (D) of both uranium and thorium were found to decrease with increasing feed concentration and distribution coefficient of uranium is about 8.8 to 10.8 times higher than that of thorium. The highest distribution coefficient of uranium is 3.107 at uranium concentration of 3,182 mg/L. Uranium recovery was found to increase from 83.76 to 90.91% with the increasing number of Extraction stage from 4 to 5. Increasing of solvent to feed ratio from 1:1 to 2:1 also increases uranium recovery from 83.76 to 93.30%. However, purity of uranium obtained from most Extraction seems to be limited at 93-94%. This suggests that a scrubbing process will be required to improve the purity of uranium in this Extraction system.
Hui Yang - One of the best experts on this subject based on the ideXlab platform.
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multiple model predictive control for component content of cepr nd Countercurrent Extraction process
Information Sciences, 2016Co-Authors: Hui Yang, Lijuan He, Zhiyong Zhang, Rongxiu LuAbstract:A new multiple-model predictive control scheme is proposed for the control of the component content in the rare earth Extraction process. Multiple local linear models with two-input and two-output of the rare earth Countercurrent Extraction process are constructed, each of which is established under an operation condition. A component content predictive controller is designed for a local linear model, based on the dynamic compensation of the Extraction liquid flow and the scrubbing liquid flow. A switching algorithm based on the minimum accumulative error is formed to select the most appropriate model and controller to meet the productive purity requirements. Simulation results for the CePr/Nd Countercurrent Extraction process are presented to show the desired performance of the proposed approach.
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Multiple-model predictive control for component content of CePr/Nd Countercurrent Extraction process
Information Sciences, 2016Co-Authors: Hui Yang, Zhiyong Zhang, He Lijuan, Rongxiu LuAbstract:A new multiple-model predictive control scheme is proposed for the control of the component content in the rare earth Extraction process. Multiple local linear models with two-input and two-output of the rare earth Countercurrent Extraction process are constructed, each of which is established under an operation condition. A component content predictive controller is designed for a local linear model, based on the dynamic compensation of the Extraction liquid flow and the scrubbing liquid flow. A switching algorithm based on the minimum accumulative error is formed to select the most appropriate model and controller to meet the productive purity requirements. Simulation results for the CePr/Nd Countercurrent Extraction process are presented to show the desired performance of the proposed approach.
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Component content distribution profile control in rare earth Countercurrent Extraction process
Chinese Journal of Chemical Engineering, 2014Co-Authors: Hui Yang, Rongxiu Lu, Fangping Xu, Yongquan DingAbstract:Abstract Considering that the on-line measurement and automatic control of element component content (ECC) are difficult to perform in rare earth cascade Extraction process, the ECC distribution profile is dynamically regulated at all stages to assess the effect of product purity control. Focusing on the theory of Countercurrent Extraction, the technology parameters and pre-setting flow-rates during the extract process are designed. Under varying process parameters, a novel step by step model is also proposed for each stage to analyze the impact on the distribution profile change. Combining the mass balance model and ECC changing trend at the monitoring stage, the ECC distribution profile can be automatically regulated by dynamically compensating the related extract or scrubbing liquid flow-rate. To this end, the required product purity at the two outlets is achieved. Based on Wincc and Matlab dynamic simulators, a specific Pr/Nd cascade Extraction process is used to illustrate and demonstrate the application of the present approach.
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Component Content Soft-Sensor Based on RBF Neural Network in Rare Earth Countercurrent Extraction Process
2006 6th World Congress on Intelligent Control and Automation, 2006Co-Authors: Hui Yang, Yonggang Xu, Xin WangAbstract:In consideration of the difficulty in online measuring the component content in rare earth Extraction separation production process, the soft-sensor method based on the radial basis function (RBF) neural networks is proposed to measure the rare earth component content. The parameters of soft-sensor are optimized by the hierarchical genetic algorithms. In addition, application experiment research of this proposed method is carried out in the rare earth separation production process of a corporation. The results show that this method is effective and can realize online measuring for the component content of rare earth in the Countercurrent Extraction
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intelligent optimal control in rare earth Countercurrent Extraction process via soft sensor
International Conference on Natural Computation, 2005Co-Authors: Hui Yang, Chunyan Yang, Chonghui Song, Tianyou ChaiAbstract:According to the problems in the on-line measurement and automatic control of component content in rare-earth Countercurrent Extraction process, soft sensor strategies based on the mechanism modeling of the Extraction process and neural network technology are proposed. On this basis, the intelligent optimal control strategy is provided by combining the technologies based on soft sensor and CBR (case-based reasoning) for the Extraction process. The application of this system to a HAB yttrium Extraction production process is successful and the optimal control, optimal operation and remarkable benefits are realized.
