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tong an xian wei shi yan de gai jin
Author(s): 
Pages: 18-21
Year: Issue:  S2
Journal: Journal of Lingling Teachers College

Abstract: 1857年德国的Schweitzcr发现硫酸铜氨水溶液能溶解纤维素,然后纺丝,再用稀酸处理可得再生纤维,这种纤维叫做铜氨纤维。硫酸铜氨水溶液称为铜氨试剂,或称为Schweifzcr溶液。观行某些有机化学实验教科书中[1],关于铜氨试剂的配制方法并未给出。文献记载了用过量的碱与5%的硫酸铜作用,制备氢氧化铜沉淀。滤出沉淀,用水洗涤几次后,夹在滤纸中挤干,立刻把它溶解在尽可能少的浓氨水中[2];或把干燥的碳酸铜溶解在浓氨水中,把制得的深兰色溶液用玻璃棉过滤[2];或把硫酸铜溶在20%的氨水溶液中[3]。不同的方法,都有同一缺点,没有药品的准确用量,需要过滤。所配试剂,不宜久放。
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