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- W2390678042 abstract "The technology and mechanism of solution chemistry of preparation of strontium carbonate by double decomposition from celestite concentrate were investigated.The results indicate that the maximal SrSO4 conversion reaches 97.77% when Na2CO3 is used as the reagent,but the maximal conversion of SrSO4 is only 78.66% when(NH4)2CO3 is used.The investigation results of solution chemistry principles show that CO 32-ion is the actual conversion agent in this reaction system.CO32-irons take up the dominate position when the pH value is greater than 10.3,which benefits to the conversion.However,when the pH value is lowered to 8.5,the CO32-molar fraction in liquor almost decreases to zero and SrSO4 conversion reaction therefore nearly ceases.The detected results show that the pH values of(NH4)2CO3 solution in this research are between 8.63～8.79 at 25 ℃,while the pH value of Na2CO3 solution is greater than 11.0,therefore,the difference of pH values within the reaction systems is the basic reason why the conversion and reaction rate of SrSO4 by Na2CO3 is much higher than that by(NH4)2CO3." @default.
- W2390678042 created "2016-06-24" @default.
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- W2390678042 date "2007-01-01" @default.
- W2390678042 modified "2023-09-22" @default.
- W2390678042 title "Preparation of strontium carbonate from celestite concentrate and its solution chemistry mechanism" @default.
- W2390678042 hasPublicationYear "2007" @default.
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