公开(公告)号：US4533537A

公开(公告)日：1985-08-06

申请号：US519958

申请日：1983-08-03

申请人： Heinz Dittmar ,  Manfred Beckmann ,  Karl-Heinz Dorr ,  Ulrich Rothe ,  Ulrich Sander

发明人： Heinz Dittmar ,  Manfred Beckmann ,  Karl-Heinz Dorr ,  Ulrich Rothe ,  Ulrich Sander

IPC分类号： C01B17/765 ,  C01B17/82 ,  C01B17/74

CPC分类号： C01B17/7655 ,  Y02P20/129

摘要： The SO.sub.2 content of gases is catalytically reacted to form SO.sub.3. The SO.sub.3 -containing gases are cooled in a plurality of stages with a cooling fluid (A) before the SO.sub.3 is absorbed. The absorbing acid is cooled by a cooling fluid (B) which delivers heat to a consumer. To increase the temperature of the cooling fluid (B) or to reduce the expenditue and to prevent a temperature drop in the SO.sub.3 -containing gases below the dew point temperature, the SO.sub.3 -containing gases are cooled first by and indirect heat exchange and then by a second indirect heat exchange with a cooling fluid (A) to a temperature slightly above the dew point temperature of the SO.sub.3 -containing gases. The cooling fluid (A) is conducted in a closed cycle. The sulfuric acid circulated through the absorber is cooled by an indirect heat exchange with a liquid cooling fluid (B), which is conducted in a closed cycle. The liquid cooling fluid (B) which has been heated is heated further by an indirect heat exchange with the heated cooling fluid (A). The hot cooling fluid (B) is cooled by an indirect heat exchange with the consumer.

摘要翻译： 气体的SO2含量被催化反应形成SO 3。 在SO 3被吸收之前，含有SO 3的气体在冷却流体（A）的多个阶段中被冷却。 吸收酸由向消费者传递热量的冷却流体（B）冷却。 为了提高冷却液（B）的温度或减少消耗，并防止低于露点温度的含SO3的气体的温度下降，先将含SO3的气体先进行冷却和间接热交换，然后通过 与冷却流体（A）的第二次间接热交换到略高于含SO 3的气体的露点温度的温度。 冷却液（A）在闭合循环中进行。 循环通过吸收器的硫酸通过与封闭循环中进行的液体冷却流体（B）的间接热交换来冷却。 已加热的液体冷却流体（B）通过与加热的冷却流体（A）的间接热交换进一步加热。 热的冷却流体（B）通过与消费者的间接热交换来冷却。

公开(公告)号：US5407650A

公开(公告)日：1995-04-18

申请号：US170917

申请日：1993-12-21

申请人： Achim Hartmann ,  Ulrich Rothe ,  Dieter Schinkitz

发明人： Achim Hartmann ,  Ulrich Rothe ,  Dieter Schinkitz

IPC分类号： C01G49/10 ,  C22B47/00 ,  C22B21/00 ,  C22B26/00 ,  C22B34/00

CPC分类号： C01G49/10 ,  Y10S210/912

摘要： A process for purifying an acidic technical-grade iron chloride solution formed from cyclone dust from the production of TiO.sub.2 in accordance with the chloride process by adjusting the pH with a first neutralizing agent and thereafter introducing the pH adjusted solution in a controlled manner into a solution containing a second neutralizing agent. In this process undesired ions which are to be separated, such as chromium, vanadium, zirconium and/or niobium, precipitate in the form of efficiently filterable hydroxides which can be separated industrially under economical conditions by filtration. The filter cake is non-hazardous and can safely be disposed of by dumping. Calcium carbonate is the preferred neutralizing agent, and the pH adjustment may also advantageously be effected by using scrap iron or by using iron sinters with reduction of any Fe(III) ions before the second neutralization step.

摘要翻译： 一种用于通过用第一中和剂调节pH值，然后将受控调节的溶液以可控方式引入溶液中，从而根据氯化法生产TiO 2的旋风粉尘形成的酸性工业级氯化铁溶液的方法 含有第二中和剂。 在这种方法中，要分离的不需要的离子，如铬，钒，锆和/或铌，以有效的可过滤的氢氧化物的形式沉淀，可以在经济条件下通过过滤在工业上分离。 滤饼是无害的，可以安全地通过倾倒处理。 碳酸钙是优选的中和剂，并且pH调节也可以有利地通过使用废铁或通过在第二中和步骤之前还原任何Fe（III）离子的铁烧结体来实现。