WO2018024083A1 - Procédé utilisant une solution de vanadium hautement concentrée pour la fabrication de polyvanadate d'ammoniu. - Google Patents

Procédé utilisant une solution de vanadium hautement concentrée pour la fabrication de polyvanadate d'ammoniu. Download PDF

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Publication number
WO2018024083A1
WO2018024083A1 PCT/CN2017/092659 CN2017092659W WO2018024083A1 WO 2018024083 A1 WO2018024083 A1 WO 2018024083A1 CN 2017092659 W CN2017092659 W CN 2017092659W WO 2018024083 A1 WO2018024083 A1 WO 2018024083A1
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WIPO (PCT)
Prior art keywords
vanadium
solution
ammonium
polyvanadate
high concentration
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PCT/CN2017/092659
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English (en)
Chinese (zh)
Inventor
郭继科
彭一村
付自碧
王英
黄可行
殷兆迁
刘学文
蒋霖
冉俊
王俊
潘少彦
Original Assignee
攀钢集团攀枝花钢铁研究院有限公司
攀钢集团攀枝花钢钒有限公司
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Application filed by 攀钢集团攀枝花钢铁研究院有限公司, 攀钢集团攀枝花钢钒有限公司 filed Critical 攀钢集团攀枝花钢铁研究院有限公司
Priority to NZ747853A priority Critical patent/NZ747853A/en
Priority to RU2018145366A priority patent/RU2701564C1/ru
Publication of WO2018024083A1 publication Critical patent/WO2018024083A1/fr
Priority to ZA2018/07309A priority patent/ZA201807309B/en

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G31/00—Compounds of vanadium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G31/00—Compounds of vanadium
    • C01G31/02—Oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity

Definitions

  • the invention belongs to the field of chemical industry, and particularly relates to a method for preparing ammonium polyvanadate with high concentration vanadium solution.
  • vanadium is mainly recovered from the sodium halide vanadium solution by the acidic ammonium salt vanadium precipitation process, which is widely used at home and abroad due to its advantages of fast vanadium precipitation, high product purity, high vanadium rate and low ammonium salt consumption.
  • the main disadvantages and limitations of acidic ammonium salt vanadium are as follows: the concentration of vanadium is limited by the concentration of sodium sulfate in the solution. The vanadium and sodium in the solution exist in a certain ratio.
  • the prior art provides a low-cost and high-efficiency vanadium precipitation method, comprising the steps of: a, taking a vanadium immersion liquid, adding sulfuric acid; b, adding ammonium sulfate to the vanadium immersion liquid after a step of adding acid; c, Step b: Add ammonium sulfate solution, pass steam, adjust the pH value of the solution to 1.8-2.5, stir evenly, then let stand and separate, separate to obtain supernatant and precipitate; d, the supernatant fraction obtained in step c Return to the vanadium infusion instead of sulfuric acid and some ammonium sulfate.
  • the concentration of the solution is only 25g/L, the concentration of vanadium is low, and the reaction temperature needs to be greater than 90 ° C, the reaction time is about 1 h, and the ammonium salt is added in a large amount.
  • the object of the present invention is to provide a high concentration vanadium solution vanadium with low production cost and high vanadium precipitation efficiency. method.
  • the technical solution of the present invention to solve the technical problem is to provide a method for preparing a polyoxonium vanadate with a high concentration vanadium solution, comprising the following steps:
  • the water is heated to 80 ⁇ 90 ° C, the vanadium-containing powder material is added, and the pH is adjusted to 2.0 ⁇ 3.0;
  • step c the solution obtained in step a is slowly added to the solution obtained in step b, and the pH is ensured to be 2.0-3.0 when added, and stirred while being added;
  • step a After the solution of step a is added, the reaction is continued for 5 to 30 minutes, filtered and washed with water to obtain ammonium polyvanadate.
  • the high-concentration vanadium liquid in the step a refers to a vanadium liquid having a total vanadium content of 40-110 g/L in the vanadium solution.
  • the ammonium salt in the step a is at least one of ammonium sulfate, ammonium chloride, ammonium nitrate, ammonium carbonate or ammonium hydrogencarbonate.
  • the vanadium-containing powder material in the step b is at least one of ammonium polyvanadate, ammonium metavanadate, vanadium pentoxide or vanadium pentoxide.
  • the particle size of the vanadium-containing powder material in step b is all over 120 mesh sieve.
  • the vanadium-containing powder material in the step b is added in an amount of 16 to 20 times the product of the TV content of the high concentration vanadium solution and the high concentration vanadium solution volume.
  • the pH adjustment in steps a and b is adjusted with sulfuric acid.
  • the slow addition speed in the step c is 15-25 mL/min.
  • the stirring speed in the step c is 400 to 500 r/min.
  • the slow addition described in the step c is slowly dripping using a peristaltic pump.
  • the water in the step b may be replaced by the vanadium-doped supernatant, and the Na 2 O content in the vanadium-preserving supernatant is ⁇ 60 g/L.
  • the beneficial effects of the invention are as follows: the invention firstly raises the high concentration vanadium liquid to 65 ° C to 85 ° C, and adjusts the pH value to 6.5-8.5, and then adds the ammonium salt powder, and adds it to the pH of 2.0-3.0.
  • the reaction is carried out in a solution prepared with a vanadium-containing powder material, which effectively solves the problem of vanadium precipitation in a high-concentration vanadium solution, and can increase the total vanadium content in the vanadium-vanadium-vanadium solution to 40-110 g/L.
  • the process of the invention is simple, sinking The vanadium rate is high and the product impurity content is low.
  • the vanadium-bearing wastewater can be reduced by 50%/t V 2 O 5 or more, the working efficiency can be greatly improved, and the production cost is obviously reduced.
  • the invention provides a method for preparing ammonium polyvanadate with high concentration vanadium solution, comprising the following steps:
  • the water is heated to 80 ⁇ 90 ° C, the vanadium-containing powder material is added, and the pH is adjusted to 2.0 ⁇ 3.0;
  • step c the solution obtained in step a is slowly added to the solution obtained in step b, and the pH is ensured to be 2.0-3.0 when added, and stirred while being added;
  • step a After the solution of step a is added, the reaction is continued for 5 to 30 minutes, filtered and washed with water to obtain ammonium polyvanadate.
  • the high concentration vanadium liquid of the invention refers to a vanadium liquid with a total vanadium content of 40-110 g/L in the vanadium solution, and the high concentration vanadium liquid is limited by the concentration of sodium sulfate in the solution, and the vanadium and sodium in the solution are in a certain ratio.
  • it is easy to produce precipitates such as hydrolysate or heteropoly acid, and there are many precipitates, and the dissolution rate is much smaller than the precipitation rate.
  • the formed hydrolyzate consumes vanadate and ammonium in the solution, and the vanadium precipitation rate Low, and because the vanadium concentration is too high, the nucleation of pre-vanadium is too much, the crystal particle size is not uniform, the adsorption is strong, and the impurities are entrained and adsorbed into the product, which is difficult to wash, resulting in low purity of the product.
  • the vanadium effect of high concentration vanadium solution is mainly affected by the reaction temperature and pH, and the reaction temperature requirement is greater than 80 ° C.
  • the high concentration vanadium liquid is heated to the reaction temperature in advance, which is favorable for the reaction; meanwhile, the pH needs to be adjusted after the temperature rise.
  • the high concentration vanadium solution regulates the pH below 65 ° C, a large amount of transient hydrolysis precipitates are formed.
  • the present invention first raises the high concentration vanadium liquid to 65-85 ° C; in addition, the high concentration vanadium solution When the vanadium is extracted, the ammonium salt needs to be added.
  • the present invention raises the high-concentration vanadium liquid to 65-85 °C.
  • the pH value of the high concentration vanadium solution of the invention is 6.5-8.5, which avoids the direct adjustment of the vanadium-doped solution from alkaline to acidic process, and firstly adjusts the solution to be weakly alkaline. After adding the ammonium salt, it participates in the vanadium precipitation reaction, avoiding the high concentration of the vanadium liquid from the alkaline adjustment to the acidic hydrolysis, and the formation of sodium polyvanadate and polyvanadate, so that the obtained polyvanadate has high purity.
  • the present invention also adds a quantity of vanadium-containing powder material to the diluent water, the vanadium-containing powder material being one or more of ammonium polyvanadate, ammonium metavanadate, vanadium pentoxide or vanadium pentoxide.
  • the vanadium-containing powder material is too small, can not sink the ammonium polyvanadate, there are other precipitates produced, the vanadium-containing powder material is too much, the solution is viscous, can not be stirred, and can not sink the ammonium polyvanadate.
  • the inventors have obtained experimental results that the vanadium-containing powder material is added in the amount of 16 to 20 times the volume of the high concentration vanadium solution and the volume of the high concentration vanadium solution.
  • the vanadium-containing powder material needs to participate in the crystallization reaction as a microcrystalline nucleus, and promote the precipitation of ammonium polyvanadate product, and the particle size requirement is all over 120 mesh sieve.
  • the invention adopts water to dilute the high concentration vanadium solution, and can also use the vanadium precipitation supernatant, but the Na 2 O content of the vanadium precipitation supernatant is required to be ⁇ 60 g/L. When this standard is met, even the vanadium content and oxidation in the vanadium precipitation solution are satisfied.
  • the sodium content is high and the process of the invention still precipitates acceptable polyvanadate and is calcined to yield a qualified vanadium pentoxide product.
  • the invention adopts a peristaltic pump to slowly add a high concentration vanadium solution with an ammonium salt to a solution containing a vanadium-containing powder material, and the slow addition speed is 15-25 mL/min, while stirring, the stirring speed is 400-500r. /min.
  • Adopt The slow addition of the peristaltic pump can reduce the instantaneous concentration of the high concentration vanadium solution and reduce the driving force for the formation of hydrolyzate. After the high concentration vanadium solution enters the solution of step a, the hydrogen ions act as the driving force, the reaction crystallization speed is fast, and the ammonium polyvanadate precipitate is formed immediately.
  • the instantaneous vanadium concentration is very low, the sodium ion concentration is limited, and the ammonium ion in the solution replaces the polyvanadate.
  • the hydrogen ion velocity in the salt is much higher than the sodium ion displacement hydrogen ion velocity, and the binding force between the ammonium ion and the polyvanadate ion is much higher than the sodium ion and its binding force, so the formation of the hydrolyzate is difficult, and the feed rate is controlled.
  • the vanadium precipitation rate is 99.57%
  • the polyvanadate ammonium TV is 50.40%
  • the Na 2 O+K 2 O is 0.097%
  • the S is 0.045%
  • the polyvanadate is calcined to obtain the vanadium pentoxide product
  • five V 2 O 5 in the vanadium oxide product is 98.99%
  • Na 2 O is 0.119%
  • K 2 O is 0.135%
  • Si is 0.101%
  • Fe is 0.054%
  • S is 0.010%
  • P is 0.020%
  • As ⁇ 0.010 % the obtained vanadium pentoxide meets the requirements of the standard YB/T5304-2011.
  • the vanadium precipitation rate is 99.63%
  • the TV of the polyvanadate is 50.41%
  • the Na 2 O+K 2 O is 0.093%
  • the S is 0.045%.
  • the ammonium polyvanadate is calcined to obtain the vanadium pentoxide product, vanadium pentoxide.
  • the product has V 2 O 5 of 99.16%, Na 2 O of 0.119%, K 2 O of 0.143%, Si of 0.109%, Fe of 0.053%, S of 0.011%, P of 0.024%, and As ⁇ 0.010%.
  • Vanadium pentoxide meets the requirements of the standard YB/T5304-2011.
  • the vanadium precipitation rate is 99.42%
  • the multi-vanadate ammonium TV is 50.25%
  • the Na 2 O+K 2 O is 0.101%
  • the S is 0.073%
  • the poly-vanadate ammonium is calcined to obtain the vanadium pentoxide product.
  • V 2 O 5 in the vanadium oxide product is 99.12%
  • Na 2 O is 0.125%
  • K 2 O is 0.343%
  • Si 0.092%
  • Fe is 0.043%
  • S 0.019%
  • P 0.035%
  • As ⁇ 0.010 % the obtained vanadium pentoxide meets the requirements of the standard YB/T5304-2011.
  • the vanadium pentoxide product is obtained.
  • the V 2 O 5 in the vanadium pentoxide product is 95.31% and 94.22%, respectively, and the Na 2 O is 3.55% and 4.59%, respectively, and the K 2 O is 0.51%, 0.55%, Si is 0.331%, 0.356%, Fe is 0.045%, 0.041%, S is respectively 0.095%, 0.167%, P is 0.030%, 0.032%, and As is ⁇ 0.010%, the obtained vanadium pentoxide.
  • the product is far from the standard YB/T5304-2011 requirements.

Abstract

La présente invention concerne le domaine de l'ingénierie chimique, et concerne spécifiquement un procédé utilisant une solution de vanadium hautement concentrée pour fabriquer du polyvanadate d'ammonium. L'invention traite les problèmes de l'art antérieur, y compris la limitation de l'utilisation d'une solution de vanadium à faible concentration pour effectuer une précipitation de vanadium, un long processus de fabrication, un coût de production élevé et similaire. L'invention concerne un procédé utilisant une solution de vanadium hautement concentrée pour la précipitation du vanadium avec un faible coût de production et une efficacité élevée de précipitation du vanadium. Le procédé consiste à : ajuster la solution de vanadium hautement concentrée à une température et un pH appropriés, ajouter un sel d'ammonium, puis à ajouter lentement un matériau en poudre comprenant du vanadium dans la solution pour effectuer une réaction, et obtenir le polyvanadate d'ammonium une fois la réaction achevée. La solution technique résout efficacement le problème de précipitation du vanadium avec une solution de vanadium hautement concentrée, et peut augmenter la teneur totale en vanadium dans la solution de vanadium pour la précipitation du vanadium à 40-110 g/L le procédé a une technique simple, une précipitation élevée du vanadium et une faible teneur en contaminants dans le produit. Par rapport à l'art antérieur, qui utilise un sel d'ammonium acide pour la précipitation du vanadium, l'invention permet de réduire les eaux usées de précipitation de vanadium de 50 %/t V2O5. Ce procédé permet d'augmenter de manière significative l'efficacité opérationnelle et de réduire de manière significative les coûts de production.
PCT/CN2017/092659 2016-08-05 2017-07-12 Procédé utilisant une solution de vanadium hautement concentrée pour la fabrication de polyvanadate d'ammoniu. WO2018024083A1 (fr)

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NZ747853A NZ747853A (en) 2016-08-05 2017-07-12 Method for preparation of ammonium polyvanadate with high-concentration vanadium solution
RU2018145366A RU2701564C1 (ru) 2016-08-05 2017-07-12 Способ получения поливанадата аммония из высококонцентрированного ванадийсодержащего раствора
ZA2018/07309A ZA201807309B (en) 2016-08-05 2018-10-31 Method for preparation of ammonium polyvanadate with high-concentration vanadium solution

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CN201610639847.3A CN106006732B (zh) 2016-08-05 2016-08-05 高浓度钒液制备多钒酸铵的方法
CN201610639847.3 2016-08-05

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111392774A (zh) * 2020-03-13 2020-07-10 吉林吉恩镍业股份有限公司 一种以含钒碳灰为原料生产多钒酸铵和高热能碳粉的方法
CN112030011A (zh) * 2020-08-12 2020-12-04 杨秋良 一种含钒物料全湿法一步沉钒生产五氧化二钒的方法
CN112266020A (zh) * 2020-11-04 2021-01-26 攀钢集团研究院有限公司 钠化钒液制备五氧化二钒正极材料的方法
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061711A (en) * 1976-10-26 1977-12-06 Uop Inc. Recovery of vanadium values
CN1594106A (zh) * 2004-06-17 2005-03-16 攀钢集团攀枝花钢铁研究院 制备高密度多钒酸铵的方法
CN102502823A (zh) * 2011-10-21 2012-06-20 攀钢集团攀枝花钢铁研究院有限公司 高振实密度多钒酸铵的制备方法
CN102758088A (zh) * 2012-06-07 2012-10-31 攀钢集团攀枝花钢铁研究院有限公司 一种制备高密度多钒酸铵的方法及湿法提钒工艺
CN105174308A (zh) * 2015-10-20 2015-12-23 攀钢集团攀枝花钢铁研究院有限公司 一种多钒酸铵的制备方法
CN105586500A (zh) * 2016-03-17 2016-05-18 攀钢集团攀枝花钢钒有限公司 从高钠高钒溶液中沉钒的方法
CN106006732A (zh) * 2016-08-05 2016-10-12 攀钢集团攀枝花钢铁研究院有限公司 高浓度钒液制备多钒酸铵的方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039582A (en) * 1975-12-29 1977-08-02 Gakif Zakirovich Nasyrov Method of preparing vanadium pentoxide
CN101412539B (zh) * 2008-11-18 2010-12-08 攀钢集团研究院有限公司 一种氧化钒的清洁生产方法
CN104003443B (zh) * 2014-06-13 2015-09-16 攀钢集团攀枝花钢铁研究院有限公司 一种加晶种制备偏钒酸铵的方法
CN105314678B (zh) * 2015-11-19 2016-08-31 攀钢集团西昌钢钒有限公司 一种五氧化二钒的制备方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061711A (en) * 1976-10-26 1977-12-06 Uop Inc. Recovery of vanadium values
CN1594106A (zh) * 2004-06-17 2005-03-16 攀钢集团攀枝花钢铁研究院 制备高密度多钒酸铵的方法
CN102502823A (zh) * 2011-10-21 2012-06-20 攀钢集团攀枝花钢铁研究院有限公司 高振实密度多钒酸铵的制备方法
CN102758088A (zh) * 2012-06-07 2012-10-31 攀钢集团攀枝花钢铁研究院有限公司 一种制备高密度多钒酸铵的方法及湿法提钒工艺
CN105174308A (zh) * 2015-10-20 2015-12-23 攀钢集团攀枝花钢铁研究院有限公司 一种多钒酸铵的制备方法
CN105586500A (zh) * 2016-03-17 2016-05-18 攀钢集团攀枝花钢钒有限公司 从高钠高钒溶液中沉钒的方法
CN106006732A (zh) * 2016-08-05 2016-10-12 攀钢集团攀枝花钢铁研究院有限公司 高浓度钒液制备多钒酸铵的方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GUO, JIKE: "Preparation of Ammonium Polyvanadate Using High Concentration of Vanadium Solution Containing Sodium", IRON STEEL VANADIUM TITANTIUM, vol. 38, no. 3, 30 June 2017 (2017-06-30), pages 14, ISSN: 1004-7638 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111392774A (zh) * 2020-03-13 2020-07-10 吉林吉恩镍业股份有限公司 一种以含钒碳灰为原料生产多钒酸铵和高热能碳粉的方法
CN111392774B (zh) * 2020-03-13 2022-09-02 吉林吉恩镍业股份有限公司 一种以含钒碳灰为原料生产多钒酸铵和高热能碳粉的方法
CN112030011A (zh) * 2020-08-12 2020-12-04 杨秋良 一种含钒物料全湿法一步沉钒生产五氧化二钒的方法
CN112266020A (zh) * 2020-11-04 2021-01-26 攀钢集团研究院有限公司 钠化钒液制备五氧化二钒正极材料的方法
CN113336267A (zh) * 2021-05-11 2021-09-03 武汉科技大学 一种利用金属镀层催化还原制备三氧化二钒的方法
CN115196677A (zh) * 2022-08-08 2022-10-18 攀钢集团研究院有限公司 一种钒液精制五氧化二钒的方法
CN115196677B (zh) * 2022-08-08 2023-11-28 攀钢集团研究院有限公司 一种钒液精制五氧化二钒的方法
CN116081690A (zh) * 2023-01-13 2023-05-09 中铝郑州有色金属研究院有限公司 一种高钠高草酸盐钒渣生产聚钒酸铵的方法

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