利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

47 条记录 (耗时 0.028 秒)

    Process for making crude phosphoric acid
    41.
    发明授权
    Process for making crude phosphoric acid 失效
    制备粗磷酸的方法

    公开(公告)号：US4780294A

    公开(公告)日：1988-10-25

    申请号：US10333

    申请日：1987-02-03

    申请人： Gunther Schimmel ,  Friedrich Kolkmann ,  Reinhard Gradl ,  Herbert Ressel

    发明人： Gunther Schimmel ,  Friedrich Kolkmann ,  Reinhard Gradl ,  Herbert Ressel

    IPC分类号： C01B25/222 ,  C01B25/22 ,  C01B25/223 ,  C01B25/16 ,  C01B17/16

    CPC分类号： C01B25/2208 ,  C01B25/223

    摘要： Crude phosphoric acid is made by subjecting crude phosphate ore containing sulfide to processing treatment with a mineral acid in a closed system comprised of a processing reactor, a filtering zone and an off-gas scrubbing zone. To this end, a soluble compound of a metal forming difficultly soluble sulfides in the respective acid medium is added either(A) during the processing operation the phosphate ore is subjected to or(B) during the scrubbing operation the off-gas is subjected toand the resulting sulfide precipitate is filtered off in case (A) together with further matter precipitated during the processing operation and, in case (B) separated from the scrubbing liquid.

    摘要翻译： 粗磷酸是通过在含有加工反应器，过滤区和废气洗涤区的封闭系统中，使含有硫化物的粗磷酸盐矿石与无机酸进行处理而制成的。 为此，在各种酸性介质中形成难以溶解的硫化物的金属的可溶性化合物在（a）在磷酸盐矿石经历的处理操作期间或（B）中加入废气进行处理 并且在（A）的情况下将所得的硫化物沉淀与在处理操作期间沉淀的另外的物质一起被滤出，并且在与洗涤液分离的情况下（B）。

    Process for working-up an aqueous silicohydrofluoric acid solution
    42.
    发明授权
    Process for working-up an aqueous silicohydrofluoric acid solution 失效
    处理水性硅酸氢氟酸溶液的方法

    公开(公告)号：US4774005A

    公开(公告)日：1988-09-27

    申请号：US76340

    申请日：1987-07-22

    申请人： Gunther Schimmel

    发明人： Gunther Schimmel

    IPC分类号： C02F1/52 ,  C02F1/58 ,  C02F1/66 ,  B01D21/01

    CPC分类号： C02F1/5236 ,  C02F1/583 ,  C02F1/66

    摘要： An aqueous solution of hexafluorosilicic acid containing 2 to 15 wgt % H.sub.2 SiF.sub.6 is worked up. To this end, the solution is admixed with particulate CaCO.sub.3 or Ca(OH).sub.2 consisting to an extent of at least 70% of particles having a size of more than 8 .mu.m, but to an extent of at most 15% of particles having a size of more than 2 mm, or with CaCO.sub.3 in admixture with CaO or Ca(OH).sub.2. The calcium compound is used in a quantity sufficient to establish a molar ratio of Ca.sup.2+ /SiF.sub.6.sup.2- of 2.8 to 3.5, and the reaction is effected at a temperature higher than 50.degree. C. After a period of 0.6 to 2.5 hours, the reaction product is filtered.

    摘要翻译： 含有2〜15重量％H 2 SiF 6的六氟硅酸水溶液被处理。 为此，将溶液与颗粒状CaCO 3或Ca（OH）2混合，所述CaCO 3或Ca（OH）2与至少70％尺寸大于8μm的颗粒的程度组成，但至多具有至多15％ 尺寸大于2mm，或与CaO或Ca（OH）2混合的CaCO 3。 钙化合物的使用量足以使Ca2 + / SiF62-的摩尔比为2.8〜3.5，反应在高于50℃的温度下进行。在0.6〜2.5小时后，反应产物 被过滤。

    Process for reducing the fluorine content in wet-processed phosphoric acid
    46.
    发明授权
    Process for reducing the fluorine content in wet-processed phosphoric acid 失效
    降低湿法磷酸中氟含量的方法

    公开(公告)号：US4540557A

    公开(公告)日：1985-09-10

    申请号：US633142

    申请日：1984-07-23

    申请人： Reinhard Gradl ,  Gunther Schimmel

    发明人： Reinhard Gradl ,  Gunther Schimmel

    IPC分类号： C01B25/46 ,  C01B25/16 ,  C01B15/16 ,  C01B25/26

    CPC分类号： C01B25/461 ,  C01B25/462

    摘要： The disclosure relates to a process for reducing the fluorine content in wet-processed phosphoric acid. To this end, the disclosure provides for an acid extract in an organic solvent to be treated with an at least 45 weight % suspension of aluminum hydroxide of which 99% consist of particles with a size of less than 1 .mu.m, the balance consisting of particles with a size of less than 10 .mu.m.

    摘要翻译： 本公开涉及一种降低湿法磷酸中氟含量的方法。 为此，本公开内容提供了用至少45重量％的氢氧化铝悬浮液处理的有机溶剂中的酸提取物，其中99％由尺寸小于1μm的颗粒组成，其余由 尺寸小于10微米的颗粒。

    Process for after-treating extraction residues originating from the decontamination of phosphoric acid
    47.
    发明授权
    Process for after-treating extraction residues originating from the decontamination of phosphoric acid 失效
    用于后处理来自磷酸去污的提取残留物的方法

    公开(公告)号：US4457848A

    公开(公告)日：1984-07-03

    申请号：US412142

    申请日：1982-08-27

    申请人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    发明人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    IPC分类号： C01B25/32 ,  C01B25/234 ,  C01B25/46 ,  C01F11/46 ,  C02F1/52 ,  C02F1/66 ,  C01B25/26

    CPC分类号： C02F1/66 ,  C01B25/461 ,  C02F1/5236 ,  Y10S210/906

    摘要： The disclosure relates to a process for after-treating extraction residues, termed raffinates, originating from the extractive decontamination of crude phosphoric acid. To this end, the disclosure provides for the raffinates to be converted to two separate solid matter fractions of differant chemical composition by admixing the raffinates with a calcium compound so as to establish a pH-value of 1.2 up to 2.5. Next, the resulting precipitate consisting essentially of gypsum is filtered off as a first solid matter fraction, and washed with water. The resulting filtrate and the wash water are made into a mixture and predetermined proportions of calcium compound are added so as to obtain, after complete reaction, a fully reacted filter cake with a pH-value of 9 up to 12, the resulting suspension being filtered off at a pH-value of 6 to 8. The filter cake consisting essentially of calcium phosphate is separated as the second solid matter fraction, and allowed to react completely.

    摘要翻译： 本公开涉及用于后处理来自粗磷酸的萃取去污的萃取残余物（称为残油）的方法。 为此，本公开内容提供了通过将残液与钙化合物混合而将残液物转化为两种不同化学成分的固体物质组分，以便建立1.2至2.5的pH值。 接下来，将所得到的基本上由石膏组成的沉淀物作为第一固体成分进行过滤，并用水洗涤。 将所得滤液和洗涤水制成混合物，并加入预定比例的钙化合物，以便在完全反应后获得pH值为9至12的完全反应的滤饼，将所得悬浮液过滤 在pH值为6至8的情况下，基本上由磷酸钙组成的滤饼作为第二固体成分分离，并使其完全反应。