Impurities <I>on</I> and <I>in Crystals</I> of Australian Solar Salts

DOI Web Site

Bibliographic Information

Other Title
  • オーストラリア天日塩の結晶中および結晶表面の不純物について
  • オーストラリア テンジツエン ノ ケッショウ チュウ オヨビ ケッショウ ヒョ
  • Studies on Mother Liquid in Salt-Manufacturing Process (Part 24)
  • 製塩における缶内液に関する研究 (第24報)

Search this article

Description

In the previous papers, the amount and the crystal-form of impurities on and in crystals of vacuum and solar salts were reported. In this paper, the authors studied in the same way those of sample-salts from 7 Australian solar salt-fields, which had represented in recent years a large portion of Japanese imported salt.<BR>1. According to the analytical results of the Australian solar salts imported during 1969-1971 made by the branches of the Japan Salt Public Corporation, the impurities were 2.4-4.4% H2O, 0.05-0.11% Mg++, 0.05-0.23% Ca++ and 0.01-0.03% K+. From the results, the concentration of the total impurities (in and on) was estimated at 0.7-2.6 K2, 10-27Mg and 2-9 SO4 mol/1000 mol H2O.<BR>2. The impurities in crystals of solar salts of Shark Bay, Lake Macleod and Port Hedland were 0.14-1.6% H2O, 0.006-0.024% K+, 0.004-0.05% Mg++ and 0.009-0.026% Ca++.<BR>3. The concentration of the impurities in crystals was greater than that of the impurities on crystals. This was due to the removal of impurity by washing in salt field. And it was estimated that sample of Lake Macleod contained K2SO4 or its double salt in crystals.<BR>4. Ratios of the impurities in crystals to the total impurities were K+; 30-90%, Mg++; 10-50%, Ca++; 20-40%, whose figures were the limit of impurities refined by complete washing.<BR>5. The impurities in crystals of Lake Macleod and Port Hedland solar salts imported during 1969-1971 were H2O; 0.93, 1.84%, K+; 0.012, 0.022%, Mg++; 0.024, 0.063% and Ca++; 0.013, 0.011%, respectively. Composition of the impurities in crystals of Port Hedland was on the concentration process of sea water, while that of Lake Macleod was SO4-rich shifted from the concentrating process of sea water.<BR>6. Water in the crystals of these salts was contained in the form of cavities. Solar salts containing more cavities, were not transparent. It was estimated that the solar salts of Port Hedland crystallized more advanced degree of concentrating process of sea water than those of Lake Macleod, because they contained more concentrated mother liquid in the crystals.

Journal

Details 詳細情報について

Report a problem

Back to top