The new technology for the preparation of cryolite from fluosilicic acid and ammonium hydrocarbonate is introduced.
介绍了氟硅酸、碳酸氢铵制备冰晶石的新工艺.
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Bites suction cup the toxin and apply 3 % ammonia solution or 5 % sodium hydrocarbonate solution.
若咬伤中毒,可用火罐拔出毒液,并涂3%氨水或5%碳酸氢钠溶液.
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First , brine is reacted with ammonium hydrocarbonate to obtain the sodium hydrocarbonate and and then filtrated.
卤水和固体碳酸氢铵反应得碳酸氢钠和母液,碳酸氢钠经煅烧得纯碱.
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