Aging Effect of Starting Solutions on Wet-Chemical Powder Preparation Using Ethanolic Solution of Oxalic Acid
Aging Effect of Starting Solutions on Wet-Chemical Powder Preparation Using Ethanolic Solution of Oxalic Acid
复制标题
草酸乙醇溶液制备湿法化学粉剂起始液的老化效果
DOI：
10.2109/jcersj.107.278
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发表时间：
1999
影响因子：
1.1
通讯作者：
Z. Nakagawa
中科院分区：
文献类型：
--
作者：
N. Enomoto;J. Shiihara;Tadashi Hongo;Z. Nakagawa
当将金属硝酸盐和草酸的乙醇溶液加水混合沉淀草酸镁水合物时，需要特别注意起始溶液的年龄，这对沉淀行为有很大的影响。例如，数天的老化时间指数延迟了溶液中云的出现，即延长了降水的潜伏期。虽然老化溶液的结构特征尚未通过核磁共振澄清，但我们认为，可见的透明溶液并不总是均匀的，即使它在很长一段时间内看起来是稳定的。
When magnesium oxalate hydrates were precipitated by mixing ethanolic solutions of the metal nitrates and oxalic acid with addition of water, particular attention was paid to the age of the starting solutions, which had drastically influenced the precipitation behavior. For instance, the aging time of several days exponentially delayed the occurrence of the clouds in the solution, in other words, elongated the incubation period of the precipitation. Although the structural features in the aged solution have not yet been clarified by NMR, we believe that a visibly transparent solution is not always homogeneous, even if it looks stable for a long period.