…In the presence of air or oxygen, the aqueous solution dissolves gold and silver, forming cyanide complexes. In industry, molten sodium is reacted with ammonia at 300-400°C to produce sodium amide, which is then reacted with carbon to produce sodium cyanamide, which is then heated to 700°C to convert it into sodium cyanide (Castner process). It can also be produced by the reaction of hydrocyanic acid and sodium hydroxide. … *Some of the terminology that refers to the "Castner process" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…水溶液は空気または酸素の共存で金および銀を溶解し,シアノ錯塩をつくる。 工業的には,溶融ナトリウムに300~400℃でアンモニアを作用させてナトリウムアミドをつくり,これを炭素と反応させてナトリウムシアナミドとし,さらに700℃に熱してシアン化ナトリウムに変える(カストナー法Castner process)。シアン化水素酸と水酸化ナトリウムの作用でもつくられる。… ※「Castner process」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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