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    • 87. 发明授权
    • Hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome
    • 从碳铬铁生产碱金属重铬酸盐的水热氧化法
    • US09157133B2
    • 2015-10-13
    • US13882354
    • 2010-11-02
    • Zhu JiJinsong WangZhong ZhangYuqing YangAishan WangWeiguo SongXinjian YinQingting WeiHongwei RuWenwen ZhangHaijun Mei
    • Zhu JiJinsong WangZhong ZhangYuqing YangAishan WangWeiguo SongXinjian YinQingting WeiHongwei RuWenwen ZhangHaijun Mei
    • C22B34/32C01G37/14C01G49/02
    • C22B34/32C01G37/14C01G49/02
    • The present invention provides a hydrothermal oxidation method for producing alkali metal dichromate from carbon ferrochrome, and the method comprises the following steps: formulating an initial reaction liquid by mixing carbon ferrochrome, an alkaline substance and water, in which the actual addition amount of the alkali is controlled smaller than the theoretically required amount; adding the initial reaction liquid into a reaction kettle, charging an oxidizing gas into the reaction kettle, and allowing the reaction to proceed for 0.5 to 3 h at a temperature of 150° C. to 370° C. and a pressure of 2 Mpa to 24 MPa; carrying out solid-liquid separation, cooling the resultant filtrate to a temperature of −12° C. to −20° C. to precipitate crystals, and carrying out separation by centrifuge to obtain alkali metal dichromate solution; adding CrO3 to the alkali metal dichromate solution until the degree of acidification reaches 100% or greater, concentrating the solution by evaporation, and cooling it to precipitate crystals, so as to afford alkali metal dichromate. The method has a simple process, is easy to control, and can directly produce sodium dichromate under hydrothermal conditions.
    • 本发明提供一种从碳铬铁制备碱金属重铬酸盐的水热氧化方法,其方法包括以下步骤:通过混合碳铬铁,碱性物质和水,配制初始反应液,其中碱的实际添加量 控制小于理论要求量; 将初始反应液加入反应釜中,将氧化气体加入到反应釜中,并使反应在150℃至370℃的温度和2Mpa的压力下进行0.5至3小时, 24 MPa; 进行固液分离,将得到的滤液冷却至-12℃〜-20℃的温度,析出结晶,通过离心分离,得到重金属碱金属溶液; 将CrO 3加入到碱金属重铬酸盐溶液中直至酸化度达到100%以上,蒸发浓缩溶液,冷却析出晶体,得到碱金属重铬酸盐。 该方法工艺简单,易于控制,可在水热条件下直接生成重铬酸钠。
    • 89. 发明授权
    • Network security authentication method
    • 网络安全认证方式
    • US08195942B2
    • 2012-06-05
    • US10531569
    • 2003-09-22
    • Tao ZhangZhong Zhang
    • Tao ZhangZhong Zhang
    • H04L29/06
    • H04L63/062H04L63/08H04L63/0823
    • An authentication method for network security includes: configuring a Media Gateway (MG) with an authentication key and setting a security data package on a network protocol by a Media Gateway Controller (MGC); during a security authentication, sending, by the MGC, security authentication request data to the MG using the data package; receiving by the MGC a calculation result obtained by performing an encryption calculation on the request data using the authentication key by the MG; and determining by the MGC whether the MG is legal according to the calculation result.
    • 一种用于网络安全的认证方法包括:使用认证密钥配置媒体网关(MG),并通过媒体网关控制器(MGC)在网络协议上设置安全数据包; 在安全认证过程中,由MGC使用数据包向MG发送安全认证请求数据; 由MGC接收通过使用MG的认证密钥对请求数据执行加密计算而获得的计算结果; 并由MGC根据计算结果确定MG是否合法。