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公开(公告)号:US20130129604A1
公开(公告)日:2013-05-23
申请号:US13518107
申请日:2010-12-08
申请人: Holger Friedrich , Rainer Ortmann , Matthias Stenger , Matthias Boll , Daniel Van Rooyen , Naveen Kalideen
发明人: Holger Friedrich , Rainer Ortmann , Matthias Stenger , Matthias Boll , Daniel Van Rooyen , Naveen Kalideen
IPC分类号: C01G37/14
CPC分类号: C01G37/14
摘要: Process for preparing ammonium dichromate, comprising the steps of c) thermally decomposing an alkali metal ammonium chromate double salt, especially a sodium ammonium chromate double salt or hydrates thereof, at a temperature up to 200° C., especially of 75 to 190° C., to form ammonium dichromate and d) removing the ammonium dichromate from the decomposition product obtained after step c), by crystallization, characterized in that the alkali metal ammonium chromate double salt corresponds to the formula Mx(NH4)yCrO4 or hydrates thereof, in which M is Na or K, particular preference being given to Na, x is from 0.1 to 0.9, preferably from 0.4 to 0.7, y is from 1.1 to 1.9, preferably from 1.3 to 1.6, and the sum of x and y is 2.
摘要翻译: 制备重铬酸铵的方法,包括以下步骤:c)在高达200℃,特别是75至190℃的温度下热分解碱金属铬酸铬复合盐,特别是铬酸铵钠盐或其水合物 以形成重铬酸铵,和d)通过结晶从步骤c)中获得的分解产物中除去重铬酸铵,其特征在于碱金属铬酸铬复盐对应于式Mx(NH4)yCrO4或其水合物,其在 其中M为Na或K,特别优选为Na,x为0.1至0.9,优选为0.4至0.7,y为1.1至1.9,优选为1.3至1.6,x和y之和为2。
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公开(公告)号:US20130108543A1
公开(公告)日:2013-05-02
申请号:US13518111
申请日:2010-12-08
申请人: Holger Friedrich , Rainer Ortmann , Matthias Stenger , Daniel Van Rooyen , Naveen Kalideen , Matthias Boll
发明人: Holger Friedrich , Rainer Ortmann , Matthias Stenger , Daniel Van Rooyen , Naveen Kalideen , Matthias Boll
IPC分类号: C01G37/033
CPC分类号: C01G37/033 , B22F9/20 , C01G37/14 , C09C1/34 , C09K3/1409 , C22C1/045
摘要: Process for preparing chromium(III) oxide, comprising the steps of: a) Decomposing an alkali metal ammonium chromate double salt at a temperature of 200 to 650° C., especially of 250 to 550° C., b) washing the decomposition product obtained after a) and c) calcining the product obtained after b) at a temperature of 700 to 1400° C., especially of 800 to 1300° C.
摘要翻译: 制备氧化铬(III)的方法,包括以下步骤:a)在200至650℃,特别是250至550℃的温度下分解碱金属铬酸铬复盐,b)将分解产物 a)之后获得,和c)在700至1400℃,特别是800至1300℃的温度下煅烧在b)之后获得的产物。
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