A multi-phase slag containing Na2O is potential to efficiently dephosphorize high-P hot metal.After dephosphorization,the generated slag with high P2O5 content is regarded as a P resource.Because P2O5 was mainly conce...A multi-phase slag containing Na2O is potential to efficiently dephosphorize high-P hot metal.After dephosphorization,the generated slag with high P2O5 content is regarded as a P resource.Because P2O5 was mainly concentrated in the 2CaO SiO2-3CaO P2O5 solid solution,the recovery of P from dephosphorization slag primarily depends on the separation of the solid solution from other phases.The distribution ratios of P2O5 between solid solution and liquid phase in the CaOSiO2-FeO-P2O5-Nslag system were investigated.The results indicated that the addition of Na2O facilitated the enrichment of P2O5 in the solid solution because it increased not only the distribution ratio of P2O5 but also the mass fraction of the solid solution.The distribution ratio of P2O5 was independent of the P2O5 content in slag.A higher P2O5 content in slag resulted in higher P2O5 and Na2O contents in the solid solution.The distribution ratio of P2O5 increased with the total Fe content in the liquid phase,regardless of the valence of Fe.An increase in the FeO content in slag brought a higher P2O5 content in the solid solution.As slag basicity increased,the distribution ratio of P2O5 increased,but the P2O5 content in the solid solution decreased.展开更多
The solubilities of Cs 2 SO 4 -C 2 H 5 OH-H 2 O ternary system at 30℃and 50℃have been studied using microe-quipment for solubility determination.There appears two phases,alcoh olic phase,water phase in the liquid ph...The solubilities of Cs 2 SO 4 -C 2 H 5 OH-H 2 O ternary system at 30℃and 50℃have been studied using microe-quipment for solubility determination.There appears two phases,alcoh olic phase,water phase in the liquid phase.The solubilities of Cs 2 SO 4 in water,C 2 H 5 OH and mixed solvent have been determ ined.The phase diagram indicated that C 2 H 5 OH might be salted out by Cs 2 SO 4 from this system and the equilibrium solid phase is Cs 2 SO 4 .展开更多
The attractive utilization route for one-step catalytic oxidation of dimethyl ether to dimethoxymethane was successfully carried out over the H3PW12O40(40%)/SiO2 catalyst, modified by Cs, K, Ni, and V. The Cs modifi...The attractive utilization route for one-step catalytic oxidation of dimethyl ether to dimethoxymethane was successfully carried out over the H3PW12O40(40%)/SiO2 catalyst, modified by Cs, K, Ni, and V. The Cs modification of H3PW12O40(40%)/SiO2 gave the most promising result of 20% dimethyl ether conversion and 34.8% dimethoxymethane selectivity. Dimethoxymethane could be synthe- sized via methoxy groups decomposed from dimethyl ether through the synergistic effect between the acid sites and the redox sites of Cs modified H3PW12O40(40%)/SiO2.展开更多
The two new compounds Cs5EuCl8· 14H2O(5∶ 1 type) and Cs2EuCl5· 4H2O(2∶ 1 type) were found and synthesized from CsCl EuCl3 11% HCl H2O quaternary systems by phase equilibrium method, and were characterized ...The two new compounds Cs5EuCl8· 14H2O(5∶ 1 type) and Cs2EuCl5· 4H2O(2∶ 1 type) were found and synthesized from CsCl EuCl3 11% HCl H2O quaternary systems by phase equilibrium method, and were characterized and measured by ultra violet absorption spectrometry and fluorescence spectrum. The results show that upconversion spectrum exhibit at 590nm and 610nm exited at 790nm, and the upconversion intensity increases with the EuCl3 ratio increasing in CsCl.展开更多
基金This work was financially supported by the National Natural Science Foundation of China(Nos.51704010,51604003,U1760117)Key Laboratory Open Project Fund of Metallurgical Emission Reduction and Resources Recycling(Anhui University of Technology)Ministry of Education(JKF18-02).
摘要A multi-phase slag containing Na2O is potential to efficiently dephosphorize high-P hot metal.After dephosphorization,the generated slag with high P2O5 content is regarded as a P resource.Because P2O5 was mainly concentrated in the 2CaO SiO2-3CaO P2O5 solid solution,the recovery of P from dephosphorization slag primarily depends on the separation of the solid solution from other phases.The distribution ratios of P2O5 between solid solution and liquid phase in the CaOSiO2-FeO-P2O5-Nslag system were investigated.The results indicated that the addition of Na2O facilitated the enrichment of P2O5 in the solid solution because it increased not only the distribution ratio of P2O5 but also the mass fraction of the solid solution.The distribution ratio of P2O5 was independent of the P2O5 content in slag.A higher P2O5 content in slag resulted in higher P2O5 and Na2O contents in the solid solution.The distribution ratio of P2O5 increased with the total Fe content in the liquid phase,regardless of the valence of Fe.An increase in the FeO content in slag brought a higher P2O5 content in the solid solution.As slag basicity increased,the distribution ratio of P2O5 increased,but the P2O5 content in the solid solution decreased.
摘要The solubilities of Cs 2 SO 4 -C 2 H 5 OH-H 2 O ternary system at 30℃and 50℃have been studied using microe-quipment for solubility determination.There appears two phases,alcoh olic phase,water phase in the liquid phase.The solubilities of Cs 2 SO 4 in water,C 2 H 5 OH and mixed solvent have been determ ined.The phase diagram indicated that C 2 H 5 OH might be salted out by Cs 2 SO 4 from this system and the equilibrium solid phase is Cs 2 SO 4 .
基金Foundation items:the National Natural Science Foundation of China(No.20373085)the Natural Science Foundation of Shanxi Province(No.20051023)
摘要The attractive utilization route for one-step catalytic oxidation of dimethyl ether to dimethoxymethane was successfully carried out over the H3PW12O40(40%)/SiO2 catalyst, modified by Cs, K, Ni, and V. The Cs modification of H3PW12O40(40%)/SiO2 gave the most promising result of 20% dimethyl ether conversion and 34.8% dimethoxymethane selectivity. Dimethoxymethane could be synthe- sized via methoxy groups decomposed from dimethyl ether through the synergistic effect between the acid sites and the redox sites of Cs modified H3PW12O40(40%)/SiO2.
摘要The two new compounds Cs5EuCl8· 14H2O(5∶ 1 type) and Cs2EuCl5· 4H2O(2∶ 1 type) were found and synthesized from CsCl EuCl3 11% HCl H2O quaternary systems by phase equilibrium method, and were characterized and measured by ultra violet absorption spectrometry and fluorescence spectrum. The results show that upconversion spectrum exhibit at 590nm and 610nm exited at 790nm, and the upconversion intensity increases with the EuCl3 ratio increasing in CsCl.