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Process for preparing electronic-grade manganese sulfate without potassium-sodium-calcium-magnesium method

An electronic grade, manganese sulfate liquid technology, applied in the direction of manganese sulfate, can solve the problems of difficult to purchase, high cost, expensive manganese fluoride, etc., and achieve the effect of saving production equipment investment

Pending Publication Date: 2020-12-11
福建省连城锰矿有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of technology that exempts potassium sodium calcium magnesium method to prepare electronic-grade manganese sulfate, to solve the utilization of fluoride to remove calcium magnesium proposed in the above-mentioned background technology to exist manganese fluoride price is expensive and difficult to buy; And sodium fluoride , ammonium fluoride, etc. have the risk of introducing other impurities and high cost

Method used

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  • Process for preparing electronic-grade manganese sulfate without potassium-sodium-calcium-magnesium method
  • Process for preparing electronic-grade manganese sulfate without potassium-sodium-calcium-magnesium method
  • Process for preparing electronic-grade manganese sulfate without potassium-sodium-calcium-magnesium method

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Embodiment

[0044] Embodiment: 1, be processed into 120 order fine powder 200g with manganese-containing 35% manganese dioxide ore and the manganese sulfide concentrate 100g that contains manganese 50%, sulfur 25% of flotation gained in 1.5L 1.5mol / L sulfuric acid solution 1.3L of crude manganese sulfate solution was obtained by acid leaching at temperatures above 85°C, and the pH at the end point was 2.5; 23.5g of lime was added to adjust the pH of the manganese sulfate to about 5.0 to remove iron impurities, and 1.26L of iron-removing manganese sulfate solution was obtained by filtration, with the indicators as follows :

[0045]

[0046] 2. Add 18.2g of 63% industrial-grade barium sulfide to the manganese sulfate solution obtained in the previous step, react at 60°C for 1 hour, filter, and then filter after standing for 24 hours to obtain 1.1L of purified manganese sulfate solution. The obtained indicators are as follows:

[0047] 3. Use the above manganese sulfate solution to pre...

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Abstract

The invention discloses a process for preparing electronic-grade manganese sulfate without a potassium-sodium-calcium-magnesium method in the technical field of batteries. According to the invention,by adopting a new thought, calcium, magnesium, potassium and sodium are left in a solution, manganese is separatedfrom the solution in the form of precipitate, and pure manganese salt precipitate is obtained after washing, so that all problems brought by fluorine are completely solved; various raw materials used in the method are inorganic chemical products, so that organic substances involved inextraction are avoided, hazardous wastes are not generated, and the investment of production equipment is saved; and the adopted manganese precipitation agent and wastewater thereof are sodium salt, other harmful heavy metals are completely treated at the front end, and sodium sulfate can be produced by crystallization or diluted to the discharge standard to be discharged according to the content.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a process for preparing electronic-grade manganese sulfate by a potassium-sodium-calcium-magnesium-free method. Background technique [0002] Electronic grade manganese sulfate is mainly used to prepare lithium manganate positive material and manganese source in NCM ternary battery positive electrode material. There are two main technical routes: inorganic process is to obtain manganese sulfate solution after acid leaching of manganese ore, manganese sulfate After removing iron, potassium and sodium, removing heavy metal impurities, removing calcium and magnesium by fluorine method, and removing fluorine, the solution obtains a high-purity manganese sulfate solution, and then undergoes atmospheric pressure evaporation and crystallization to prepare a monohydrate electronic grade manganese sulfate solid; the organic process is manganese ore After acid leaching, manganese sulfate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/10C01P2006/80
Inventor 刘清华
Owner 福建省连城锰矿有限责任公司
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