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    • 69. 发明申请
    • Process for the production of an aluminium-containing iron oxide crystallization nucleus
    • 生产含铝铁氧化物晶核的方法
    • US20020050230A1
    • 2002-05-02
    • US09945181
    • 2001-08-31
    • Ulrich Meisen
    • C09C001/22
    • B82Y30/00C01G49/0045C01G49/06C01P2002/60C01P2002/70C01P2004/64C01P2006/12C01P2006/62C01P2006/63C01P2006/64C09C1/24
    • The present invention relates to a process for the production of aluminum-containing iron oxide crystallization nuclei having an null-FeOOH crystal structure with an aspect ratio of 2100 to 3100 by using FeCl2, comprising the steps of a) initially adding an Al component, while stirring, in amounts of 6 to 20 mole % based on total Fe, to an iron II chloride solution with a total Fe content of 20-100 g/l, and a Fe III content of 0.1-10 mole % Fe III (based on total Fe), b) heating this mixture to a precipitation temperature between 30null C. and 60null C., c) adding a precipitating agent with an active constituent content of 2-10 equivalents per liter, preferably 4-8 equivalents per liter, to the mixture, and the molar ratio FenullAl to precipitating agent is 20%-80% of the stoichiometric amount, d) then oxidizing the precipitated suspension with an oxidizing agent at an oxidation rate of 2-50 mole %/hr. of the iron to be oxidized and the subsequent production of iron oxide red pigments via null-FeOOH as intermediate.
    • 本发明涉及一种通过使用FeCl 2生产具有长径比为2100〜3100的α-FeO​​OH晶体结构的含铝氧化铁结晶核的方法,包括以下步骤:a)最初加入Al组分,同时 以总Fe计6至20摩尔%的量与总Fe含量为20-100克/升的铁II氯化物溶液,Fe III含量为0.1-10摩尔%Fe III(基于 总Fe),b)将该混合物加热至30℃至60℃之间的沉淀温度,c)加入活性成分含量为2-10当量/升,优选4-8当量/升的沉淀剂 ,并且Fe + Al与沉淀剂的摩尔比为化学计量量的20%-80%,d)然后用氧化剂以2-50摩尔%/小时的氧化速率氧化沉淀的悬浮液。 的铁被氧化,随后通过α-FeO​​OH作为中间体生产氧化铁红色颜料。