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1. 发明公开

EP2322483A1 CHROMIUM(III) CARBONATE AND PROCESS FOR PRODUCTION OF SAME 审中-公开
标题翻译： CHROM（III）-CARBONAT UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP2322483A1
公开(公告)日：2011-05-18
申请号：EP09811441.6
申请日：2009-08-27
申请人： Nippon Chemical Industrial Co., Ltd.
发明人： KUWANO Hiroyuki , BANDA Tomohiro , TANAKA Yasuyuki
IPC分类号： C01G37/00 , C25D21/14
CPC分类号： C25D3/10 , C01G37/00 , C01P2006/62 , C01P2006/63 , C01P2006/64 , C23C2222/10 , C25D3/06
摘要： The chromium (III) carbonate of the present invention exhibits a light blue color in a solid state. This chromium (III) carbonate has an L* value of 50 to 70, an a* value of -4 to -2, and a b* value of -10 to -7, which are represented by the L*a*b* color system (JIS Z8729). This chromium (III) carbonate is preferably completely dissolved within 30 minutes when the chromium (III) carbonate is added, in an amount corresponding to a Cr content of 1 g, to 1 liter of an aqueous solution of hydrochloric acid having a pH of 0.2 at a temperature of 25°C. This chromium (III) carbonate is preferably obtained by contacting an aqueous solution of carbonate and an aqueous solution containing trivalent chromium at a pH of 6 to 12 under the condition of a reaction liquid temperature of 0°C or more and less than 50°C. Also, preferably, after production of the chromium (III) carbonate, filtration is performed, and the chromium (III) carbonate is washed with water until the conductivity of the filtrate is 5 mS/cm or less.
摘要翻译：本发明的碳酸铬（III）表现出固态的淡蓝色。该碳酸铬（III）的L *值为50〜70，a *为-4〜-2，ab *为-10〜-7，由L * a * b *颜色系统（JIS Z8729）。当碳酸铬（III）以相当于Cr含量1g的量加入到1升pH为0.2的盐酸水溶液中时，碳酸铬（III）优选在30分钟内完全溶解在25℃的温度下。该碳酸铬（III）优选通过在反应液温度为0℃以上且小于50℃的条件下使碳酸盐水溶液和含有3价铬的水溶液在pH6〜12下接触而得到。此外，优选在碳酸铬（III）的制造之后，进行过滤，并用水洗涤碳酸铬（III）直到滤液的电导率为5mS / cm以下。

2. 发明公开

EP2322481A1 METHOD FOR PRODUCING AQUEOUS SOLUTION CONTAINING CHROMIUM (III) SOURCE 审中-公开
标题翻译： VERFAHREN ZUR HERSTELLUNG EINERWÄSSRIGENLÖSUNGMIT EINER CHROM（III）-QUELLE
公开(公告)号：EP2322481A1
公开(公告)日：2011-05-18
申请号：EP09811411.9
申请日：2009-08-24
申请人： Nippon Chemical Industrial Co., Ltd.
发明人： HOSHINO Shigeo , SHIMPO Ryokichi , TANAKA Yasuyuki
IPC分类号： C01G37/00 , C23C22/48 , C25D3/06 , C25D3/10
CPC分类号： C25D3/06 , B82Y30/00 , C01G37/02 , C01P2004/62 , C01P2004/64 , C23C22/46 , C23C2222/10 , C25D3/10
摘要： In a method for manufacturing an aqueous solution containing a source of chromium (III) according to the present invention, an aqueous solution containing trivalent chromium is added to an aqueous solution of an inorganic alkali under the condition of a reaction liquid temperature of 0°C or more and less than 50°C, so that the amount of the trivalent chromium is not locally excessive with respect to the amount of the alkali, to produce chromium hydroxide, and then the chromium hydroxide is dissolved in an aqueous solution of an acid to obtain an aqueous solution containing a source of chromium (III). Preferably, after production of the chromium hydroxide, filtration is performed, and the chromium hydroxide is washed with water until the conductivity of the filtrate is 5 mS/cm or less.
摘要翻译：在制造含有本发明的铬（III）源的水溶液的方法中，将含有三价铬的水溶液在反应液温度为0℃的条件下加入到无机碱的水溶液中或更多且小于50℃，使得三价铬的量相对于碱的量不是局部过量的，产生氢氧化铬，然后将氢氧化铬溶解在酸的水溶液中得到含有铬（III）源的水溶液。优选地，在生产氢氧化铬之后，进行过滤，用水洗涤氢氧化铬直至滤液的电导率为5mS / cm以下。

3. 发明公开

EP2322480A1 PROCESS FOR PRODUCTION OF CHROMIUM HYDROXIDE 审中-公开
标题翻译： VERFAHREN ZUR HERSTELLUNG VON CHROMHYDROXID
公开(公告)号：EP2322480A1
公开(公告)日：2011-05-18
申请号：EP09811413.5
申请日：2009-08-24
申请人： Nippon Chemical Industrial Co., Ltd.
发明人： KUWANO Hiroyuki , BANDA Tomohiro , TANAKA Yasuyuki
IPC分类号： C01G37/00 , C25D21/14
CPC分类号： C01G37/00 , B82Y30/00 , C01G37/02 , C01P2004/62 , C01P2004/64 , C23C2222/10
摘要： In a method for manufacturing chromium hydroxide according to the present invention, chromium hydroxide having higher solubility in an acidic aqueous solution than chromium hydroxide obtained by conventional manufacturing methods can be obtained. The method is characterized by simultaneously adding an aqueous solution of an inorganic alkali and an aqueous solution containing trivalent chromium to an aqueous medium under the condition of a reaction liquid temperature of 0°C or more and less than 50°C to produce chromium hydroxide. The pH of the reaction liquid while the aqueous solution containing trivalent chromium and the aqueous solution of the inorganic alkali are added is preferably maintained in the range of 7.0 to 12.
摘要翻译：在根据本发明的氢氧化铬的制造方法中，可以获得在通过常规制造方法获得的比氢氧化铬在酸性水溶液中溶解度高的氢氧化铬。该方法的特征在于，在反应液温度为0℃以上且低于50℃的条件下，同时向含水介质中添加无机碱的水溶液和含有3价铬的水溶液，生成氢氧化铬。加入含有三价铬的水溶液和无机碱的水溶液时的反应液的pH优选保持在7.0〜12的范围内。

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