利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

47 条记录 (耗时 0.017 秒)

    Process for defluorinating alkali metal phosphate solutions
    1.
    发明授权
    Process for defluorinating alkali metal phosphate solutions 失效
    氟化碱金属磷酸盐溶液的方法

    公开(公告)号：US4620966A

    公开(公告)日：1986-11-04

    申请号：US619057

    申请日：1984-06-11

    申请人： Gunther Schimmel ,  Herbert Ressel ,  Gero Heymer ,  Reinhard Gradl

    发明人： Gunther Schimmel ,  Herbert Ressel ,  Gero Heymer ,  Reinhard Gradl

    IPC分类号： C01B25/30 ,  C01B25/16

    CPC分类号： C01B25/308

    摘要： The disclosure relates to a process for defluorinating alkali metal phosphate solutions. To this end, the disclosure provides for an alkali metal phosphate solution neutralized to a pH-value of more than 6 and pre-purified to be stirred at 60.degree. to 120.degree. C. into an alkaline earth metal compound. Alkaline earth metal compounds with a solubility in water of less than 5 g/l are used in the form of particles of which more than 50% have a size of less than 8 .mu.m. After a reaction period of 0.5 to 4 hours, the precipitate obtained is separated from the purified alkali metal phosphate solution.

    摘要翻译： 本公开涉及一种氟化碱金属磷酸盐溶液的方法。 为此，本公开内容提供将中和至pH值大于6并经60℃至120℃预纯化以进入碱土金属化合物的碱金属磷酸盐溶液。 在水中的溶解度小于5g / l的碱土金属化合物以超过50％的尺寸小于8μm的颗粒的形式使用。 反应时间为0.5〜4小时后，从纯化的碱金属磷酸盐溶液中分离得到的沉淀物。

    Process for removing fluorine and organic compounds from prepurified wet processed phosphoric acid
    3.
    发明授权
    Process for removing fluorine and organic compounds from prepurified wet processed phosphoric acid 失效
    从预纯化湿法磷酸中除去氟和有机化合物的方法

    公开(公告)号：US4539192A

    公开(公告)日：1985-09-03

    申请号：US625456

    申请日：1984-06-28

    申请人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    发明人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    IPC分类号： C01B25/234 ,  C01B25/237 ,  C01B25/46 ,  C01B25/16

    CPC分类号： C01B25/461 ,  C01B25/237

    摘要： The disclosure provides for phosphoric acid to be freed in a single process stage from fluorine and organic contaminants. To this end, the disclosure provides for the acid to be introduced into the upper portion of a closed structural element, for it to be treated therein at elevated temperature and pressure with steam flowing countercurrently to the acid, and for the acid so treated to be reacted in the lower portion of the structural element with hydrogen peroxide. The disclosure also provides an apparatus for carrying out the process.

    摘要翻译： 本公开提供在单一工艺阶段中从氟和有机污染物中释放的磷酸。 为此，本公开提供了将酸引入封闭结构元件的上部，以使其在升高的温度和压力下被处理，其中蒸汽与酸反向流动，并且对于被酸处理的酸 在结构元件的下部与过氧化氢反应。 本公开还提供了一种用于执行该过程的装置。

    Recovery of uranium from wet-process phosphoric acid
    4.
    发明授权
    Recovery of uranium from wet-process phosphoric acid 失效
    从湿法磷酸中回收铀

    公开(公告)号：US4460549A

    公开(公告)日：1984-07-17

    申请号：US229978

    申请日：1981-01-30

    申请人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    发明人： Gunther Schimmel ,  Reinhard Gradl ,  Gero Heymer

    IPC分类号： B01D11/04 ,  C01G43/00 ,  C22B60/02

    CPC分类号： C22B60/026 ,  Y02P10/212

    摘要： The present invention relates to a process for recovering uranium from raffinate which is obtained by extracting phosphoric acid from a uranium-containing wet-process phosphoric acid with the aid of organic extractants and separating the resulting organic phosphoric acid extract from residue not taken up by the extract. To this end, the raffinate residue is subjected to thermal treatment and thereby freed from dissolved or emulsified residual extractant. Next, the raffinate is treated with a water-immiscible solvent to extract the uranium, and the extracted uranium is separated from the undissolved raffinate portion.

    摘要翻译： 本发明涉及从萃余液中回收铀的方法，该方法是通过有机萃取剂从含铀的湿法磷酸中提取磷酸而得到的，并将所得的有机磷酸提取物从不被 提取。 为此，对残液进行热处理，从而除去溶解或乳化残渣的萃取剂。 接下来，用不与水混溶的溶剂处理萃余液以提取铀，并将萃取的铀与未溶解的萃余液部分分离。

    Process for after-treating extraction residues originating from the decontamination of phosphoric acid
    8.
    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。

    Process for making crude phosphoric acid
    9.
    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）。