粗盐提纯方法改进探究
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摘要
采用控制变量法结合粉末X射线衍射表征技术探究了粗盐提纯实验中影响沉淀形态、结晶度以及实验时间和产品产率的因素,实验结果表明:第2次过滤实验的最优条件是机械搅拌速度为1r/s,粗盐用量为8g,煮沸时间为12min。该条件下沉淀全部以晶体形式析出,产品产率高达76.25%。
The control variable method with X-ray powder diffraction characterization technique were employed to explore the influencing factors of precipitate form,crystallinity as well as experimental time and product yields in purification of crude salt.The research result indicated that the best conditions for the second filtration of crude salt purification are as follows:the stirring speed is 1rotation per second,the dosage of crude salt is 8grams,and the heating time is 12 minutes.The precipitation separate out all in crystal form under the above condition and the product yield in 76.25%.
The control variable method with X-ray powder diffraction characterization technique were employed to explore the influencing factors of precipitate form,crystallinity as well as experimental time and product yields in purification of crude salt.The research result indicated that the best conditions for the second filtration of crude salt purification are as follows:the stirring speed is 1rotation per second,the dosage of crude salt is 8grams,and the heating time is 12 minutes.The precipitation separate out all in crystal form under the above condition and the product yield in 76.25%.
引文
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[2]黄微,高明丽,李婉,等.化学教育(中英文),2017,38(2):30-33
[3]胡敏,高培红,向丹,等.化学教育,2016,37(2):29-30
[4]吴文源.化学教育,2007,28(6):34-35
[5]成斌斌.化学教与学,2013(5):82-84
[6]雷艳虹,曹小华.化学教与学,2013(7):94
[7]刘志红,余燕艳.化学教育,2015,36(4):68-70
[8]唐海燕.中学化学,2016(8):56-57
[9]孙秋香,张蕾.高等函授学报:自然科学版,2008(21):47-48
[10]马逸群.中国现代教育装备,2013(16):39-40
[11]丁爱明.数理化学习,2015(6):83
[12]陈鲜丽.化学教学,2007(8):8-9
[13]董大海,唐翊国.大学化学,1994(5):48-50
[14]王克强.化学通报,1992(9):42-44