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    Method for producing iron oxide pigments from waste acid resulting from TiO2 production
    1.
    发明授权
    Method for producing iron oxide pigments from waste acid resulting from TiO2 production 失效
    由二氧化钛生产产生的废酸生产氧化铁颜料的方法

    公开(公告)号：US06530987B1

    公开(公告)日：2003-03-11

    申请号：US09646372

    申请日：2000-09-15

    申请人： Gerhard Auer ,  Günter Lailach ,  Ulrich Meisen ,  Werner Schuy ,  Udo Julius

    发明人： Gerhard Auer ,  Günter Lailach ,  Ulrich Meisen ,  Werner Schuy ,  Udo Julius

    IPC分类号： C01G4906

    CPC分类号： C01G49/08 ,  C01G49/06 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C01P2006/80

    摘要： Process for the preparation of iron oxide pigments from the waste acid resulting from the preparation of titanium dioxide by the sulfate process, characterized in that in a first stage a partial neutralization of the sulfuric acid contained in the waste acid is performed with compounds from the group comprising metallic iron and/or iron compounds, the sulfuric acid is optionally further neutralized with a further alkaline compound, the precipitate containing Ti, Al, Cr and V compounds is separated from the resultant reaction product and an iron oxide yellow pigment or iron oxide black pigment is precipitated from the resultant iron sulfate-containing solution by addition of alkaline compounds as well as an oxidizing agent, each pigment being able to be baked to form an iron oxide red pigment.

    摘要翻译： 用于通过硫酸盐法制备二氧化钛所产生的废酸制备氧化铁颜料的方法，其特征在于在第一阶段中，使用来自该组的化合物对废酸中所含的硫酸进行部分中和 包括金属铁和/或铁化合物，任选地用另外的碱性化合物进一步中和硫酸，从所得反应产物中分离含有Ti，Al，Cr和V化合物的沉淀物，并将氧化铁黄色颜料或氧化铁黑 通过加入碱性化合物和氧化剂从所得到的含硫酸铁溶液中沉淀颜料，每种颜料都可以被烘烤以形成氧化铁红颜料。

    Method for reprocessing waste acid resulting from TiO2 production
    2.
    发明授权
    Method for reprocessing waste acid resulting from TiO2 production 失效
    二氧化钛生产废弃酸处理方法

    公开(公告)号：US06440377B1

    公开(公告)日：2002-08-27

    申请号：US09646340

    申请日：2000-09-15

    申请人： Gerhard Auer ,  Günter Lailach ,  Ulrich Meisen ,  Werner Schuy

    发明人： Gerhard Auer ,  Günter Lailach ,  Ulrich Meisen ,  Werner Schuy

    IPC分类号： C01F100

    CPC分类号： C01G49/06 ,  C01F11/46 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64

    摘要： Process for the production of gypsum and also of an iron-oxide pigment from the waste acid that accumulates in the course of the production of titanium dioxide in accordance with the sulfate process, characterized in that in a first stage a partial neutralization of the waste acid is effected with a calcium compound subject to precipitation and optionally direct separation of gypsum, subsequently the remaining solution is neutralized further in a second stage subject to precipitation of a deposit containing Ti, Al, Cr, V and optionally Fe(III) and from the solution containing iron sulfate that is obtained after separation of the solids an iron-oxide pigment is produced in a third stage by addition of alkaline compounds and also of an oxidizing agent.

    摘要翻译： 用于生产石膏的方法以及根据硫酸盐法在二氧化钛生产过程中积聚的废酸中的氧化铁颜料的制备方法，其特征在于在第一阶段中将废酸部分中和 由钙化合物进行沉淀和任选地直接分离石膏，随后在第二阶段中进一步中和残留的溶液，沉淀含有Ti，Al，Cr，V和任选的Fe（III）的沉积物，并从 通过添加碱性化合物和氧化剂，在第三阶段中产生含有硫酸铁的含有硫酸铁的溶液，所述硫酸铁在分离固体后得到氧化铁颜料。

    Method for reprocessing waste acid to form gypsum and iron oxide
    3.
    发明授权
    Method for reprocessing waste acid to form gypsum and iron oxide 失效
    后处理废酸形成石膏和氧化铁的方法

    公开(公告)号：US06416723B1

    公开(公告)日：2002-07-09

    申请号：US09646280

    申请日：2000-09-15

    申请人： Gerhard Auer ,  Günter Lailach ,  Ulrich Meisen ,  Werner Schuy

    发明人： Gerhard Auer ,  Günter Lailach ,  Ulrich Meisen ,  Werner Schuy

    IPC分类号： C01F100

    CPC分类号： C01C1/028 ,  C01F11/46 ,  C01G49/06 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/60 ,  C01P2006/62 ,  C01P2006/63 ,  C01P2006/64 ,  C04B11/262

    摘要： Process for the production of gypsum and also of an iron-oxide pigment from the waste acid that accumulates in the course of the production of titanium dioxide in accordance with the sulfate process, characterized in that in a first stage a partial neutralization of the waste acid is effected with a calcium compound subject to precipitation and optionally direct separation of gypsum, subsequently the remaining solution is neutralized further in a second stage subject to precipitation of a deposit containing Ti, Al, Cr, V and optionally Fe(III) and from the solution containing iron sulfate that is obtained after separation of the solids an iron-oxide pigment is produced in a third stage by addition of alkaline compounds and also optionally addition of ammonia and also of an oxidizing agent, ammonia being liberated by addition of CaO and/or Ca(OH)2 from the solution containing (NH4)2SO4 that is obtained after separation of the iron-oxide pigment.

    摘要翻译： 用于生产石膏的方法以及根据硫酸盐法在二氧化钛生产过程中积聚的废酸中的氧化铁颜料的制备方法，其特征在于在第一阶段中将废酸部分中和 由钙化合物进行沉淀和任选地直接分离石膏，随后在第二阶段中进一步中和残留的溶液，沉淀含有Ti，Al，Cr，V和任选的Fe（III）的沉积物，并从 在第三阶段通过添加碱性化合物以及任选地加入氨以及氧化剂产生在固体分离出氧化铁颜料后得到的含有硫酸铁的溶液，通过添加CaO和/ 或Ca（OH）2从含有（NH 4）2 SO 4的溶液中分离出来）。

    Method for directly cooling fine-particle solid substances
    9.
    发明授权
    Method for directly cooling fine-particle solid substances 失效
    直接冷却细颗粒固体物质的方法

    公开(公告)号：US07003965B2

    公开(公告)日：2006-02-28

    申请号：US10482909

    申请日：2002-07-04

    申请人： Gerhard Auer ,  Dirk Weber ,  Werner Schuy ,  Frank Wittekopf

    发明人： Gerhard Auer ,  Dirk Weber ,  Werner Schuy ,  Frank Wittekopf

    IPC分类号： F17C9/02 ,  F17C7/02 ,  F25D13/06 ,  F25D17/02

    CPC分类号： F28C3/12 ,  B02C19/06 ,  B02C23/20 ,  C01P2004/61 ,  C09C1/24 ,  C09C1/3018 ,  C09C1/3623 ,  C09C3/041 ,  F25B19/005

    摘要： The invention relates to a method for directly cooling fine-particle, powdery solid substances by using a cooling medium provided in the form of low-boiling condensed gases or of cold gases obtained therefrom, whereupon bulk material packings are subsequently filled with these solid substances. The invention also relates to a device for directly cooling the fine-particle, powdery solid substances and to fine-particle, powdery solid substances, which are located inside bulk material packings and which, compared to air, have a lower oxygen content in the gas phase between the solid substance particles.

    摘要翻译： 本发明涉及通过使用以低沸点浓缩气体或由其获得的冷气体形式提供的冷却介质直接冷却细颗粒粉状固体物质的方法，随后用这些固体物质填充散装材料填料。 本发明还涉及一种用于直接冷却微粒，粉状固体物质和微粒状粉末状固体物质的装置，它们位于散装材料填料内，与空气相比，气体中的氧含量较低 固相物质颗粒之间的相位。