A kind of production method of granular anhydrous manganese chloride

An anhydrous manganese chloride, production method technology, applied in manganese halide and other directions, can solve the problems of high drying temperature, easy secondary pulverization and moisture absorption, material stagnation, etc., to reduce the drying residence time and improve the anti-absorption Moisture, avoid the effect of package scalding

Active Publication Date: 2016-08-24
重庆新申新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main drying processes for the production of granular anhydrous manganese chloride: one is the static tray drying method, which is labor-intensive, the product is loose and easy to powder, the material does not flow, and the dry and wet uniformity of the product is poor. And it is prone to over-baking phenomena such as black spots and yellow spots, which will affect the activity of the product. The initial moisture of the finished product is generally above 0.5%.
The other is the fluidized bed granulation drying method. When drying, the air volume is large, and the amount of fine anhydrous manganese chloride entering the scrubber is large, which affects the drying energy consumption of anhydrous manganese chloride; the air volume is large, Vacuum drying is not possible, and the drying temperature is high. Strong acidic conditions are required to reduce the blackening and yellowing of anhydrous manganese chloride caused by high temperature and oxygen. After molding, the product has a rough surface, loose granular structure, low specific gravity, and is easy to dry. Secondary pulverization and moisture absorption
High-temperature drying and strong acidity are highly corrosive to equipment and have an adverse effect on product purity and production cost control. In addition, high-temperature drying and strong acidity are not conducive to environmental protection and the health of on-site workers

Method used

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  • A kind of production method of granular anhydrous manganese chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 ： A production method of granular anhydrous manganese chloride, comprising the steps of:

[0034]1) Chemical material: react manganese carbonate and hydrochloric acid at a molar ratio of 1:1.96 to obtain a concentration of 38 o The manganese chloride solution of Bé; The pH value of the control chemical end point is 6.5;

[0035] 2) Impurity removal: During the stirring process, slowly add hydrogen peroxide with a concentration of 27.5% and barium chloride aqueous solution with a concentration of 20% to the above chemical solution, and control the reaction temperature at 60°C; stir for 3.0 hours, and then add a pH regulator To adjust the pH value of the manganese chloride solution, when the pH value of the manganese chloride solution was stable at 6.0, filter to obtain the manganese chloride impurity removal solution.

[0036] 3) Filtration: filter to remove insoluble matter, obtain a refined manganese chloride solution after fine filtration, and adjust th...

Embodiment 2

[0043] Example 2 ： A production method of granular anhydrous manganese chloride, comprising the steps of:

[0044] 1) Chemical material: react manganese carbonate and hydrochloric acid at a molar ratio of 1:1.98 to obtain a concentration of 36 o Bé's manganese chloride solution, the pH value of the control chemical end point is 5.6.

[0045] 2) Impurity removal: During the stirring process, slowly add 15% hydrogen peroxide and freshly synthesized barium carbonate slurry (containing about 26% barium carbonate) to the above chemical solution, and control the reaction temperature at 75°C. After 2.5 hours, add a pH regulator to adjust the pH value of the manganese chloride solution, and when the pH value of the manganese chloride solution is stable at 6.5, filter to obtain a manganese chloride impurity-removing solution.

[0046] 3) Filtration: filter to remove insoluble matter, obtain a refined manganese chloride solution after fine filtration, and adjust the pH of the solut...

Embodiment 3

[0053] Example 3 ： A production method of granular anhydrous manganese chloride, comprising the steps of:

[0054] 1) Chemical material: react manganese flakes with hydrochloric acid at a molar ratio of 1:1.99 to obtain a concentration of 36 o For the manganese chloride solution of Bé, the pH value at the end point of the chemical material is controlled to be 5.0.

[0055] 2) Impurity removal: During the stirring process, slowly add 10% hydrogen peroxide and freshly synthesized barium carbonate slurry (containing about 3% barium carbonate) to the above chemical solution, and control the reaction temperature at 86°C; stir the reaction After 2 hours and 40 minutes, add a pH regulator to adjust the pH value of the manganese chloride solution. When the pH value of the manganese chloride solution is stable at 5.5, filter to obtain the manganese chloride impurity removal solution.

[0056] 3) Filtration: filter to remove insoluble matter, obtain a refined manganese chloride sol...

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Abstract

The invention provides a production method of granular anhydrous manganese chloride, which comprises chemical material, impurity removal, filtration, and concentrated manganese chloride concentrated solution with a concentration of 45-52oBé, which is sprayed into a drying granulator at a set temperature Inside, carry out granulation and drying; then sieve the manganese chloride particles after granulation, and feed the larger manganese chloride particles into the disc vacuum dryer at a uniform speed for vacuum drying after sieving; finally, the manganese chloride particles Vacuum space wall cooling, and sealed packaging. Among them, the method of granulation drying is to heat the granulation dryer, and then add a small amount of manganese chloride concentrate to form tiny crystals of manganese chloride, then spray the manganese chloride concentrate, under the action of kneading and turning, Manganese chloride crystals grow up to form dense manganese chloride particles, and at the same time, new tiny crystals of manganese chloride are formed. It has the advantages of simple process, convenient operation, energy saving and environmental protection, stable product quality, high activity and long warranty period.

Description

technical field [0001] The invention belongs to the field of production of inorganic chemical products, in particular to a production method of granular anhydrous manganese chloride. Background technique [0002] Anhydrous manganese chloride is widely used in pharmaceutical synthesis, feed additives, analytical reagents, pigment manufacturing, alloy smelting, dry battery manufacturing and other fields. Granular anhydrous manganese chloride does not generate dust when used, which can meet the needs of people to improve the working environment and occupational health, and can also reduce material loss; at the same time, the specific gravity of granular anhydrous manganese chloride is larger than that of powder anhydrous manganese chloride. Can reduce packaging, transportation, storage costs. High activity, low water content, and uniform water content are the expectations of anhydrous manganese chloride customers for its quality. The product activity and moisture content of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/06
Inventor 申静王强
Owner 重庆新申新材料股份有限公司
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