A method was developed for preparing high purity Al30O8(OH)56(H2O)_(24)^(18)+(Al30) through elimination of impurities by complexation.Polyaluminum chloride II(PAC_(30))with Al_(c )content of 75%was adopted as the sour...A method was developed for preparing high purity Al30O8(OH)56(H2O)_(24)^(18)+(Al30) through elimination of impurities by complexation.Polyaluminum chloride II(PAC_(30))with Al_(c )content of 75%was adopted as the source of Al_(30).The PAC_(30)was prepared under conditions of total aluminum concentration 0.1 mol/L and OH^-/Al ratio 2.2 to obtain the highest content of Al_(30).A precipitation/metathesis method,organic solvent precipitation method and organic complexation method were examined to separate and purify Al_(30).It was found that only by the organic complexation method could high purity Al_(30)products be obtained in large yield economically.In the experiments,benzoic acid was used as the coordinating reagent to decompose the main impurity AlO_4Al_(12)(OH)_(24)(H_2O)_(12)^(7+)(Al_(13)),and the Al_(30)product could be obtained by precipitation and metathesis operations.It was noteworthy that the decomposition of impurities by benzoic acid could be completed in 2 hr.The Al_(30)product was characterized by Ferron assay,^(27)Al-NMR,SEM,XRD and TGA.The results showed that the purity of the Al_(30)product could exceed 92%.展开更多
The authors regret<the information of authors and affiliations“Libing Liu Qinxue Yang 2,3,Pin Wang 1,2,Feng Xiao 2,Ruyuan Jiao 2,Guangyu An 2,∗,Dongsheng Wang 2,∗1,2,1.University of Chinese Academy of Sciences,Bei...The authors regret<the information of authors and affiliations“Libing Liu Qinxue Yang 2,3,Pin Wang 1,2,Feng Xiao 2,Ruyuan Jiao 2,Guangyu An 2,∗,Dongsheng Wang 2,∗1,2,1.University of Chinese Academy of Sciences,Beijing 100085,China 2.State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China3.Faculty Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China”should be changed to“Libing Liu 1,2,Qinxue Yang 1,3,Pin Wang 1,2,Feng Xiao 1,Ruyuan Jiao 1,Guangyu An 1,∗,Dongsheng Wang 1,∗1.State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China 2.University of Chinese Academy of Sciences,Beijing 100049,China 3.Faculty Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China”>.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 21507149, 51338010)the National Water Pollution Control and Treatment Science and Technology Major Project (No. 2015ZX07406005-002)
文摘A method was developed for preparing high purity Al30O8(OH)56(H2O)_(24)^(18)+(Al30) through elimination of impurities by complexation.Polyaluminum chloride II(PAC_(30))with Al_(c )content of 75%was adopted as the source of Al_(30).The PAC_(30)was prepared under conditions of total aluminum concentration 0.1 mol/L and OH^-/Al ratio 2.2 to obtain the highest content of Al_(30).A precipitation/metathesis method,organic solvent precipitation method and organic complexation method were examined to separate and purify Al_(30).It was found that only by the organic complexation method could high purity Al_(30)products be obtained in large yield economically.In the experiments,benzoic acid was used as the coordinating reagent to decompose the main impurity AlO_4Al_(12)(OH)_(24)(H_2O)_(12)^(7+)(Al_(13)),and the Al_(30)product could be obtained by precipitation and metathesis operations.It was noteworthy that the decomposition of impurities by benzoic acid could be completed in 2 hr.The Al_(30)product was characterized by Ferron assay,^(27)Al-NMR,SEM,XRD and TGA.The results showed that the purity of the Al_(30)product could exceed 92%.
文摘The authors regret<the information of authors and affiliations“Libing Liu Qinxue Yang 2,3,Pin Wang 1,2,Feng Xiao 2,Ruyuan Jiao 2,Guangyu An 2,∗,Dongsheng Wang 2,∗1,2,1.University of Chinese Academy of Sciences,Beijing 100085,China 2.State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China3.Faculty Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China”should be changed to“Libing Liu 1,2,Qinxue Yang 1,3,Pin Wang 1,2,Feng Xiao 1,Ruyuan Jiao 1,Guangyu An 1,∗,Dongsheng Wang 1,∗1.State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China 2.University of Chinese Academy of Sciences,Beijing 100049,China 3.Faculty Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China”>.
