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化学学报
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化学学报 ›› 1957, Vol. 23 ›› Issue (1): 52-67. 上一篇    下一篇

论文

漂白粉的水分及其稳定性

唐有祺1, 华彤文1, 廖桂芬2, 池访杰1, 林子煌1   

  1. 1. 北京大学化学系;
    2. 四川大学化学系
  • 投稿日期:1956-11-07 发布日期:2013-06-03

THE WATER CONTENT AND THE STABILITY OF BLEACHING POWDER

TANG YOU-CHI1, HUA TUNG-WEN1, LIAU KUEI-FEN2, CHIH FANG-CHIEH1, LIN SZE-HUANG1   

  1. Peking University
  • Received:1956-11-07 Published:2013-06-03

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本工作肯定,水在漂白粉的稳定性问题中具有极其重要的作用.漂白粉和漂粉精样品在0.1毫米汞柱的蒸气压下可脱去的水称为可脱水.在90°下八小时后样品中有效氯量占原有效氯量的百分数称为其稳定度.稳定度测值指出,样品的可脱水率从0%递增时,其稳定度则从100%递减至0%.根据吸水率-蒸气压图等数据,样品的可脱水主要分布在物相Ca(OCl)2·3H2O(S)和CaCl2·6H2O(S)中,而在90°下,全部可脱水则集中至前一物相.样品有效氯成分的分解主要在Ca(OCl)2·3H2O(S)中,而在Ca(OCl)2(S)中分解很少.稳定度的数据指出,在90°下,样品有效氯分解率与其中可脱水率成正比,从而亦与其中物相Ca(OCl)2·3H2O(S)的含率成正比.根据上述,作者并从生产实践的意义讨论了漂白粉的稳定性问题.

In the present investigation,water in bleaching powder was found to play a leading role in determining the stability of the latter.In order to compare the stability of various samples of bleaching powder,we determined the content of the available chlorine before and after a sample kept in a small class-stonoered tube at 90°C for 8 hours.