CN1511195A - 从含钼和钒的液体混合物中选择性脱除钼的方法 - Google Patents

从含钼和钒的液体混合物中选择性脱除钼的方法 Download PDF

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CN1511195A
CN1511195A CNA028106741A CN02810674A CN1511195A CN 1511195 A CN1511195 A CN 1511195A CN A028106741 A CNA028106741 A CN A028106741A CN 02810674 A CN02810674 A CN 02810674A CN 1511195 A CN1511195 A CN 1511195A
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molybdenum
alkali metal
xanthate
vanadium
mixture
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CN1246488C (zh
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E��ɭ��ŵ�
E·森缇门迪
N·帕纳里缇
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Snamprogetti Joint Stock Co Ltd
Eni Tecnologie SpA
Eni SpA
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Snamprogetti Joint Stock Co Ltd
Eni SpA
Eniricerche SpA
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/34—Obtaining molybdenum
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G39/00—Compounds of molybdenum
    • C01G39/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G39/00—Compounds of molybdenum
    • C01G39/06—Sulfides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/34—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing sulfur, e.g. sulfonium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/20—Obtaining niobium, tantalum or vanadium
    • C22B34/22—Obtaining vanadium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/902—Materials removed
    • Y10S210/911—Cumulative poison
    • Y10S210/912—Heavy metal

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Removal Of Specific Substances (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

一种从含有大于200毫克/升钼和含有钒的液体混合物中选择性脱除钼的方法，其特征在于，所述的方法包括以下步骤：使液体混合物的pH值小于3；将碱金属黄原酸盐的溶液加到上述溶液中，以致钼/碱金属黄原酸盐的摩尔比为1/4至1/8，通过加入无机酸使pH值保持不变；搅拌混合物使混合物中存在的钼沉积。

Description

从含钼和钒的液体混合物中 选择性脱除钼的方法
本发明涉及一种从含钼和钒的液体混合物中选择性脱除钼的方法。
通常从含有钼和钒的无机溶液中将它们彼此分离不是一件很容易的事情。在目前使用的最熟悉的和可应用的技术中，可提到的是用碱性硫化物或硫酸使钼沉积，而使钒留在溶液中，或者用有机溶剂萃取或分离。
在前一种情况下，所述的方法相对简单，生成不溶于有机溶剂的无化合物，所以在一些情况下不能直接再利用；而在后一情况下，所述的方法的确更加复杂，生成含钼的有机溶液。
我们已发现，通过使用某些浓度的碱金属黄原酸盐，有可能用这样一种简单的方法获得良好的分离产率，所述的方法生成可溶于有机溶剂的钼化合物，它们能在某些应用中直接再利用。
碱金属的黄原酸盐已知一段时间了，除了用于人造丝生产的纤维素黄原酸盐以外，还用作金属硫化物特别是硫化铜和硫化钼的浮选收集剂。
它们还用于橡胶的硫化，用作除草剂和杀虫剂，以及用作润滑剂的添加剂等。
游离酸为ROCS2H型，为无色的、不稳定的和可溶于有机溶剂的；它们在室温下按以下反应方程式分解成二硫化碳和相应的醇：
另一方面，相应的碱金属盐为相对稳定的固体，可溶于水、醇和极性有机溶剂。在含水溶液中和在室温下，乙基黄原酸钾例如按如下水解：
，通过二硫化碳和三硫代碳酸盐进一步水解，生成硫化氢。
重金属的盐更易溶于有机溶剂、氯仿、THF和苯，而它们不太溶于水、醇和脂族烃类。足够的碳原子数目使它们更易溶于有机溶剂。
本发明从含有大于200毫克/升钼和含有钒的液体混合物中选择性脱除钼的方法的特征在于，它包含以下步骤：
·使液体混合物的pH值小于3，优选等于或小于2；
·将碱金属黄原酸盐的溶液加到上述溶液中，以致钼/碱金属黄原酸盐的摩尔比为1/4至1/8、优选1/5至1/7，通过加入无机酸使pH值保持不变；
·搅拌混合物使混合物中存在的钼沉积。
推荐用于本发明方法的碱金属黄原酸盐为碱金属乙基黄原酸盐，特别是乙基黄原酸钾。
为了更好地理解本发明，给出了一些实施例，但不应将它们作为对本发明领域的限制。
实施例1
将稀释到pH值等于2的盐酸加到含有Mo和V(分别为10和5克/升)的碱性溶液中，随后在室温下缓慢加入300克/升的乙基黄原酸钾溶液，用相同的酸溶液使pH＝2保持不变。
与V不同，绝大多数Mo几乎完全沉积，前者下降程度更少。
对于Mo和V来说，沉积产率分别为约82％和8％。
实施例2
这一试验与上述试验类似，但通过硫酸使pH约等于1。在这种情况下，大大提高了Mo的沉积产率，使它与V很好地分离，沉积产率分别为95％和6％。Mo与乙基黄原酸钾的摩尔比等于1∶6。
从洗涤后的沉积物的化学分析可以看出，Mo和V的含量如下：
    元素     ％(重量)
    V     0.23
    Mo     32.4
正如可以看出的，初始Mo/V比变为140∶1，原为2∶1。
实施例3
将稀硫酸缓慢地加到含5克/升Mo和3克/升V的碱性溶液中使pH约等于1，随后加入约300克/升异丁基黄原酸钾，使pH值保持在1。在这种情况下，Mo和V的沉积产率分别为93％和7％。

Claims (5)

1.一种从含有大于200毫克/升钼和含有钒的液体混合物中选择性脱除钼的方法，其特征在于所述的方法包括以下步骤：
使液体混合物的pH值小于3；
将碱金属黄原酸盐的溶液加到上述溶液中，以致钼/碱金属黄原酸盐的摩尔比为1/4至1/8，通过加入无机酸使pH值保持不变；
搅拌混合物使混合物中存在的钼沉积。
2.根据权利要求1的方法，其中使液体混合物的pH值等于或低于2。
3.根据权利要求1的方法，其中钼/碱金属黄原酸盐的摩尔比为1/5至1/7。
4.根据权利要求1-3中任一项的方法，其中碱金属黄原酸盐为碱金属乙基黄原酸盐。
5.根据权利要求4的方法，其中碱金属乙基黄原酸盐为乙基黄原酸钾。
CNB028106741A 2001-05-25 2002-05-14 从含钼和钒的液体混合物中选择性脱除钼的方法 Expired - Lifetime CN1246488C (zh)

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ITMI01A001111 2001-05-25
IT2001MI001111A ITMI20011111A1 (it) 2001-05-25 2001-05-25 Procedimento per rimuovere selettivamente il mobildeno da miscele liquide che lo contengono assieme al vanadio

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WO2002097144A2 (en) 2002-12-05
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AU2002313469A1 (en) 2002-12-09
CA2448027A1 (en) 2002-12-05
GB2402126B (en) 2005-06-08
BR0209935A (pt) 2004-04-06
US20040262232A1 (en) 2004-12-30
JP3944162B2 (ja) 2007-07-11
GB2402126A (en) 2004-12-01
CA2448027C (en) 2009-09-22
ITMI20011111A0 (it) 2001-05-25
MXPA03010603A (es) 2004-12-06
US7255795B2 (en) 2007-08-14
GB0327253D0 (en) 2003-12-24
JP2004526870A (ja) 2004-09-02
WO2002097144A3 (en) 2003-05-01
ITMI20011111A1 (it) 2002-11-25
RU2003133975A (ru) 2005-05-10
DE10296846T5 (de) 2004-04-29
DE10296846B4 (de) 2011-02-24

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