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Preparing method for high-purity manganese sulfate

A manganese sulfate, high-purity technology, applied in the direction of manganese sulfate, etc., can solve the problems of large market demand and difficult separation, and achieve the effects of reducing pollution, simple steps, and remarkable impurity removal effect

Active Publication Date: 2018-05-18
衡阳市坤泰化工实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, it plays a pivotal role in neutralizing pharmaceuticals, so market demand exceeds supply; existing high-temperature crystallization methods and recrystallization methods are used, but it is difficult to separate magnesium, potassium, and sodium to battery grade due to the same ion effect Manganese sulfate requirements, urgently need to study new methods to solve

Method used

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Effect test

Embodiment 1

[0039] A method for preparing high-purity manganese sulfate, the method may further comprise the steps:

[0040] First add the crude manganese sulfate powder into the pure water of the dissolution kettle, dissolve under the action of stirring, control the concentration of 32-40 degrees Baume, manganese sulfate monohydrate 250-300g / L, temperature 45-60°C, and use ammonia water to control pH4. 5-6.5, after complete dissolution, add ammonium sulfide according to the amount of lead and cadmium, and use Pb, Cd: (NH) 2 S molar ratio × 110-120℅ is calculated as the addition amount, and the detection of heavy metals below 0.01mg / L is qualified, and then the heavy metals are filtered out and the solution is further sent to concentration, concentrated to 40-45 degrees Baume, put into a cooling tank, and poured with cold water. The serpentine conducts heat exchange, cools to 10-26°C, and removes the precipitated silicon-calcium-magnesium float to filter out silicon-calcium-magnesium impu...

Embodiment 2

[0042] A method for preparing high-purity manganese sulfate, the method may further comprise the steps:

[0043]First add the crude manganese sulfate powder containing heavy metals and alkaline earth metals and alkali metals into a dissolution kettle with pure water, dissolve under the action of stirring, control the concentration of 35-38 degrees Baume, manganese sulfate monohydrate 250-300g / L, temperature 45-60°C, use ammonia water to control pH 5-6; after complete dissolution, add ammonium sulfide according to the amount of lead and cadmium, and use Pb, Cd: (NH) 2 S molar ratio × 110-120℅ is calculated as the added amount, and the detection of heavy metals below 0.01mg / L is qualified; then the heavy metal solution is removed by filtration, and further sent to the concentration tank, evaporated and concentrated to 42-45 waves under the condition of 100-105°C Put the Mido into the cooling kettle, use cold water to enter the coil for heat exchange, cool to 15-20°C, after the ...

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Abstract

The invention discloses a preparing method for high-purity manganese sulfate. The preparing method includes the steps that manganese sulfate monohydrate obtained through high-temperature crystallization is put into a rotary kiln and is burned with methyl alcohol, hydroxyl ions discharged after temperature increment and a burning value are mixed into powder-crystal-shaped manganese sulfate, and magnesium ions, potassium ions and sodium ions are caught and then are coked; the dried and coked magnesium-potassium-sodium mixture is put into a dissolution kettle, deionized water is added, dissolution and filtering are carried out, and un-dissolved substances (coked magnesium-potassium-sodium granules) are separated out; a qualified manganese sulfate solution is sent to a secondary high-temperature crystallizer and crystallized, a manganese sulfate hydrated crystal is obtained, then the product is sent and dried, and the qualified manganese sulfate is obtained. The preparing method is simplein step and easy to operate, the temperature and the pH value are not required to be strictly controlled, a large quantity of high-purity impunity removing medicaments are also not required to be consumed, and through the coking effect and different dissolution degrees of all impurities, the impurities are filtered out and removed out, the impunity removing effect is remarkable, secondary pollution on the environment can be avoided, the production cost is low, and industrialization scale production is easy to achieve.

Description

technical field [0001] The invention relates to a preparation method of high-purity manganese sulfate. More specifically, the present invention relates to the method for obtaining high-purity manganese sulfate by removing calcium, magnesium, potassium and sodium in the process of preparing manganese sulfate, which belongs to the passivation process of crude manganese sulfate. Background technique [0002] The production method of high-purity manganese sulfate in the prior art generally adopts the reaction of electrolytic manganese flakes and sulfuric acid to generate manganese sulfate, or uses manganese ore powder and a reducing agent to catalyze manganese sulfate with sulfuric acid, and then obtains solid sulfuric acid in a crystallization kettle under high temperature and high pressure conditions. manganese. Due to the same ion effect produced by manganese sulfate during the growth of high-temperature crystal nuclei, calcium, magnesium, potassium, and sodium salts also cr...

Claims

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Application Information

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IPC IPC(8): C01G45/10
CPCC01G45/10C01P2006/80
Inventor 刘松林旷明社张卫衡刘利
Owner 衡阳市坤泰化工实业有限公司
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