Method for the preparation of a hardening salt in piece form and product
    1.
    发明授权
    Method for the preparation of a hardening salt in piece form and product 失效
    用于制备片状和产品的硬化盐的方法

    公开(公告)号:US5453109A

    公开(公告)日:1995-09-26

    申请号:US274428

    申请日:1994-07-13

    CPC分类号: C01C3/14 C21D1/46

    摘要: A method for the preparation of a salt mixture useful for hardening steel parts, including of potassium cyanate, potassium carbonate and sodium carbonate, wherein 2.2 to 2.3 moles of urea is first reacted with 1 mole of potassium carbonate to form potassium cyanate. The escaping ammonia is converted with formaldehyde into hexamethylenetetramine. The reaction product, which is potassium cyanate and potassium carbonate, is ground, mixed with powdered sodium carbonate and pressed at between 80.degree. and 230.degree. C. into shaped pieces.

    摘要翻译: 制备用于硬化钢部件(包括氰酸钾,碳酸钾和碳酸钠)的盐混合物的方法,其中2.2至2.3摩尔的尿素首先与1摩尔碳酸钾反应以形成氰酸钾。 逸出的氨被甲醛转化成六亚甲基四胺。 将氰酸钾和碳酸钾的反应产物研磨,与碳酸钠粉末混合并在80℃和230℃之间压制成成型片。