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1. 发明授权

US09157133B2 Hydrothermal oxidation method for production of alkali metal dichromate from carbon ferrochrome 有权
标题翻译：从碳铬铁生产碱金属重铬酸盐的水热氧化法
公开(公告)号：US09157133B2
公开(公告)日：2015-10-13
申请号：US13882354
申请日：2010-11-02
申请人： Zhu Ji , Jinsong Wang , Zhong Zhang , Yuqing Yang , Aishan Wang , Weiguo Song , Xinjian Yin , Qingting Wei , Hongwei Ru , Wenwen Zhang , Haijun Mei
发明人： Zhu Ji , Jinsong Wang , Zhong Zhang , Yuqing Yang , Aishan Wang , Weiguo Song , Xinjian Yin , Qingting Wei , Hongwei Ru , Wenwen Zhang , Haijun Mei
IPC分类号： C22B34/32 , C01G37/14 , C01G49/02
CPC分类号： C22B34/32 , C01G37/14 , C01G49/02
摘要： 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.
摘要翻译：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。

2. 发明申请

US20140341791A1 HYDROTHERMAL OXIDATION METHOD FOR PRODUCTION OF ALKALI METAL DICHROMATE FROM CARBON FERROCHROME 有权
标题翻译：碳氢化合物生产碱金属二铬酸盐的氢氧化法
公开(公告)号：US20140341791A1
公开(公告)日：2014-11-20
申请号：US13882354
申请日：2010-11-02
申请人： Zhu Ji , Jinsong Wang , Zhong Zhang , Yuqing Yang , Aishan Wang , Weiguo Song , Xinjian Yin , Qingting Wei , Hongwei Ru , Wenwen Zhang , Haijun Mei
发明人： Zhu Ji , Jinsong Wang , Zhong Zhang , Yuqing Yang , Aishan Wang , Weiguo Song , Xinjian Yin , Qingting Wei , Hongwei Ru , Wenwen Zhang , Haijun Mei
IPC分类号： C22B34/32 , C01G49/02
CPC分类号： C22B34/32 , C01G37/14 , C01G49/02
摘要： 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.
摘要翻译：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。

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