Method for reducing contents of calcium ions, magnesium ions, potassium ions and sodium ions in manganese sulfate

A technology of calcium and sodium ions in manganese sulfate, applied in manganese sulfate and other directions, can solve the problems of difficult control of process conditions, long impurity removal process, unsatisfactory impurity removal effect, etc., and achieves the effect of excellent impurity removal effect and low price.

Active Publication Date: 2013-05-22
湘潭电化科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The traditional high-purity manganese sulfate production process mainly includes: (1) add ferric sulfate and manganese fluoride respectively, and remove calcium, magnesium, potassium, and sodium ions in two steps (Chinese patent: 201010243859.7 High-purity manganese sulfate monohydrate and its preparation method; 200910193398.4 A preparation method of electronic-grade high-purity manganese sulfate monohydrate), the impurity removal process of this method is relatively long, the process conditions are difficult to control, and the impurity removal effect is not ideal; (2) adding active compounds of manganese dioxide, adsorbing K Ions and heavy metal ions (Chinese patent: 96103704.0 Purification method of manganese sulfate solution for electrolytic manganese dioxide), the preparation method of the impurity remover is complicated, the quality of the impurity remover itself is difficult to control, and the quality of the impurity remover affects the effect of impurity removal Very large, the impurity removal effect is not ideal

Method used

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  • Method for reducing contents of calcium ions, magnesium ions, potassium ions and sodium ions in manganese sulfate
  • Method for reducing contents of calcium ions, magnesium ions, potassium ions and sodium ions in manganese sulfate
  • Method for reducing contents of calcium ions, magnesium ions, potassium ions and sodium ions in manganese sulfate

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Effect test

Embodiment 1

[0029] Get 500g of industrial manganese sulfate solid and dissolve it in water and add water to 1500mL. The concentration of calcium ions in the manganese sulfate solution measured by atomic absorption is 653ppm, the concentration of magnesium ions is 3633ppm, the concentration of sodium ions is 1683ppm, and the concentration of potassium ions is 1088ppm; the solution is heated to 65°C, adjust the pH to 3.5 with 10mol / L sulfuric acid solution; add 27.8g FeF 3 Solid, stir for 1 hour, and filter the precipitate after standing for 6 hours; adjust the pH to 2.0 with 10mol / L sulfuric acid solution, raise the temperature to 95°C, add 10g of jarosite crystals, stir for 2 hours, and filter the crystals after standing at constant temperature for 12 hours ; add 93.8g MnCO 3 The pH of the filtered solution was adjusted to 4.3, and filtered after standing for 24 hours; the filtered solution was concentrated under normal pressure, crystallized, dehydrated, and dried to obtain solid mangane...

Embodiment 2

[0033] Take 5kg of industrial manganese sulfate solid and dissolve it in 50L of water. The calcium ion concentration in the manganese sulfate solution measured by atomic absorption is 880ppm, the magnesium ion concentration is 3544ppm, the sodium ion concentration is 2107ppm, and the potassium ion concentration is 1388ppm; the solution is heated to 60°C , adjust the pH to 4.2 with 18.4mol / L sulfuric acid solution; add 0.8kg FeF 3 Solid, stirred for 2 hours, and filtered the precipitate after standing for 6 hours; adjusted the pH to 2.3 with 18.4mol / L sulfuric acid solution, raised the temperature to 95°C, added 200g of jarosite solid, stirred for 3 hours, and kept the crystal at constant temperature for 24 hours Filtration; add 850g Mn(OH) 2 The pH of the filtered solution was adjusted to 4.2, and filtered after standing for 24 hours; the filtered solution was concentrated under normal pressure, crystallized, dehydrated, and dried to obtain solid manganese sulfate. The calciu...

Embodiment 3

[0037] Take 30m 3 Manganese ore sulfuric acid leaching solution, the concentration of manganese sulfate is 104g / L, the concentration of calcium ion in the manganese sulfate solution measured by atomic absorption is 1243ppm, the concentration of magnesium ion is 3672ppm, the concentration of sodium ion is 2202ppm, and the concentration of potassium ion is 1046ppm; Raise the temperature to 60°C, adjust the pH to 3.2 with 18.4mol / L sulfuric acid solution; add 411kg FeF 3 Solid, stirred for 4 hours, filtered the precipitate after standing for 12 hours; adjusted the pH to 1.4 with 18.4mol / L sulfuric acid solution, raised the temperature to 80°C, stirred for 8 hours, and filtered the crystal after standing at constant temperature for 24 hours; added 6.8kgMnCO 3The pH of the filtered solution was adjusted to 4.6, and filtered after standing for 24 hours; the filtered solution was concentrated under normal pressure, crystallized, dehydrated, and dried to obtain solid manganese sulfate...

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Abstract

The invention discloses a method for reducing contents of calcium ions, magnesium ions, potassium ions and sodium ions in manganese sulfate. F<-1> in FeF3 can be used for precipitating the calcium ions and the magnesium ions in a solution, Fe<3+> can generate sulfate together with the potassium ions and the sodium ions so as to be precipitated, and Fe(OH)3 formed by hydrolyzing the superfluous Fe<3+> has a remarkable flocculation effect, so that the FeF3 is used as a novel manganese sulfate impurity removal agent; and the calcium ions, the magnesium ions, the potassium ions and the sodium ions are successively precipitated through adjusting the pH value, thus the calcium ions, the magnesium ions, the potassium ions and the sodium ions difficultly separated in common manganese sulfate are separated at one step, and the obtained product can meet the requirement of high-purity manganese sulfate for producing battery-grade or electronic-grade manganese-based raw materials on the contents of the calcium ions, the magnesium ions, the potassium ions and the sodium ions. The method has the advantages of fewer impurity removal agent adding times, simple process, low cost, remarkable impurity removal effect, high purity and obtained manganese sulfate yield and the like, and is easy to produce on large scale.

Description

technical field [0001] The invention relates to a method for removing impurities for the preparation of high-purity manganese sulfate, especially to reduce the content of calcium, magnesium, potassium and sodium ions that are difficult to remove in low-purity manganese sulfate or manganese sulfate solution, and obtain high-purity manganese sulfate. The field of powder material preparation. Background technique [0002] Manganese sulfate is a very important basic manganese salt, which is widely used in medicine, fertilizer, feed, food, pesticide, papermaking, catalyst and other industries. Nearly 80% of manganese products in the world are prepared with manganese sulfate or manganese sulfate solution. At present, the manganese sulfate in our country is mainly obtained by manganese ore leaching with sulfuric acid and then removing impurities, and the solution still contains a certain amount of impurity ions. [0003] With the continuous expansion of the application field of li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
Inventor 王先友易欣胡海舒洪波杨秀康胡本安魏启亮邹贵山
Owner 湘潭电化科技股份有限公司
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