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硫酸渣制备高纯度硫酸亚铁 被引量:8
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作者 汤迪勇 张莉 +2 位作者 毛静 柯军 华兵 《再生资源与循环经济》 2009年第2期38-40,共3页
以高铁硫酸渣为原料,采用酸浸—还原—除杂—结晶—重结晶—干燥工艺,合成高纯度硫酸亚铁。通过反应温度、反应时间对硫酸渣中铁的浸出率的影响,以及结晶温度、干燥温度、干燥时间对硫酸亚铁产品纯度的影响做分析实验,得出最佳酸浸条件... 以高铁硫酸渣为原料,采用酸浸—还原—除杂—结晶—重结晶—干燥工艺,合成高纯度硫酸亚铁。通过反应温度、反应时间对硫酸渣中铁的浸出率的影响,以及结晶温度、干燥温度、干燥时间对硫酸亚铁产品纯度的影响做分析实验,得出最佳酸浸条件:硫酸渣与硫酸的固液比为1∶3,硫酸质量分数为20%~25%,反应温度为80℃,反应时间为6h,搅拌强度为200r/min;最佳结晶精制条件:结晶溶液pH值为1~3,温度为60℃;除杂最佳条件:pH值约为4.5;冷却结晶温度控制在20℃,结晶干燥过程为30℃,干燥6h。 展开更多
关键词 硫酸渣 硫酸亚铁 重结晶 精制制备
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Carbon nanotube: Controlled synthesis determines its future 被引量:1
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作者 Shuchen Zhang Liu Qian +5 位作者 Qiuchen Zhao Zequn Wang Dewu Lin Weiming Liu Yabin Chen Jin Zhang 《Science China Materials》 SCIE EI CSCD 2020年第1期16-34,共19页
Carbon nanotubes(CNTs) have received broad attention in the past decades due to their excellent physical and chemical properties and thus been regarded as a powerful candidate for future star-materials. Although vario... Carbon nanotubes(CNTs) have received broad attention in the past decades due to their excellent physical and chemical properties and thus been regarded as a powerful candidate for future star-materials. Although various CNT products and their related applications have been demonstrated recently, their performance can hardly meet the researchers’ expectations compared with their theoretical properties. The current predicament is caused by the immature synthesis method, including the basic science and the producing technology. As the synthesis with controlled structures determines its future, this review summarizes the progress on the basic research and industrialization of CNTs in the past decades, including the fine structure control, aggregation status design and scale-up production, and further points out the way for the future development of CNTs combining with specific applications. 展开更多
关键词 carbon nanotubes structure-controlled synthesis scale-up synthesis applications
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