A method for preparing manganese sulfate, anhydrous manganese chloride and calcium sulfate

A technology of anhydrous manganese chloride and manganese sulfate, applied in the direction of manganese sulfate, manganese halide, calcium/strontium/barium sulfate, etc., can solve the problems of harsh material requirements, enrichment of impurities, difficulty in separating ferrous sulfate, etc., and achieve The effect of less equipment investment and simple operation

Inactive Publication Date: 2011-11-30
王莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

About 10 tons of waste residue with a mass percent concentration of sulfuric acid of 10-25% is discharged for every ton of titanium dioxide produced. These waste residues can be produced by concentrated circulation process, but there are high energy consumption

Method used

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  • A method for preparing manganese sulfate, anhydrous manganese chloride and calcium sulfate
  • A method for preparing manganese sulfate, anhydrous manganese chloride and calcium sulfate

Examples

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Effect test

Embodiment 1

[0023] Reference figure 1 , A method for preparing manganese sulfate, anhydrous manganese chloride and calcium sulfate, whose raw materials are waste liquid and manganese ore obtained from the production of titanium dioxide by the sulfuric acid method, including the following specific steps:

[0024] Step A: Take 500kg of waste liquid obtained from the production of titanium dioxide by the sulfuric acid method, adjust the mass concentration of sulfuric acid contained therein to 18%, grind the peridotite into a coarse powder of 100 mesh, and put the waste liquid obtained from the production of titanium dioxide by the sulfuric acid method together with heating The soaking tank (1) of the device is soaked for 8 hours at a soaking temperature of 60°C, and the soaking liquid is filtered through a suction filter (2) to obtain a clear filtrate and filter residue;

[0025] Step B: Add manganese hydroxide to the clarified filtrate to remove impurities and filter to obtain a pure manganese s...

Embodiment 2

[0031] Reference figure 1 , A method for preparing manganese sulfate, manganese chloride tetrahydrate and calcium sulfate, whose raw materials are waste liquid and manganese ore obtained from the production of titanium dioxide by the sulfuric acid method, including the following specific steps:

[0032] Step A: Take 500kg of the waste liquid obtained from the production of titanium dioxide by the sulfuric acid method, adjust the mass concentration of sulfuric acid contained therein to 20%, grind the peridotite into a coarse powder of 120 mesh, and put the waste liquid obtained from the production of titanium dioxide by the sulfuric acid method together with heating The soaking tank (1) of the device is soaked for 9 hours at a soaking temperature of 70°C, and the soaking liquid is filtered through a suction filter (2) to obtain a clear filtrate and filter residue;

[0033] Step B: Add manganese hydroxide to the clarified filtrate to remove impurities and filter to obtain a pure mang...

Embodiment 3

[0039] Reference figure 1 , A method for preparing manganese sulfate, manganese chloride tetrahydrate and calcium sulfate, whose raw materials are waste liquid and manganese ore obtained from the production of titanium dioxide by the sulfuric acid method, including the following specific steps:

[0040] Step A: Take 500kg of the waste liquid obtained from the production of titanium dioxide by the sulfuric acid method, adjust the mass concentration of sulfuric acid contained in it to 30%, grind the peridotite into a coarse powder of 150 mesh, and put the waste liquid obtained from the production of titanium dioxide by the sulfuric acid method together with heating The soaking tank (1) of the device is soaked for 10 hours at a soaking temperature of 80°C, and the soaking liquid is filtered through a suction filter (2) to obtain a clear filtrate and filter residue;

[0041] Step B: Add manganese hydroxide to the clarified filtrate to remove impurities and filter to obtain a pure manga...

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Abstract

The invention provides a method for preparing manganese sulfate, anhydrous manganese chloride and calcium sulfate. Grinding sidellose into coarse powder, and producing titanium dioxide by sulfuric acid method is soaked at 60-80°C for 8-10 hours, and then pumped Filter to obtain a clear filtrate, add manganese hydroxide to remove impurities, and obtain a pure manganese sulfate solution; the pure manganese sulfate solution is distilled under reduced pressure into a saturated solution of manganese sulfate, cooled, and manganese sulfate crystals containing crystal water are precipitated, and then dried and pulverized , to obtain the manganese sulfate crystal product; the pure manganese sulfate solution is reacted with calcium chloride solution under stirring, the reaction product is filtered to obtain calcium sulfate filter cake and manganese chloride filtrate, and the manganese chloride filtrate is distilled under reduced pressure to be manganese perchloride saturated solution, cooled and crystallized to obtain anhydrous manganese chloride crystals, dried and crushed to obtain anhydrous manganese chloride crystal products; the calcium sulfate filter cake was washed, dried and crushed to obtain calcium sulfate dihydrate products.

Description

Technical field [0001] The invention relates to the technical field of treatment and utilization of the three wastes of inorganic chemical industry, in particular to a method for preparing manganese sulfate, anhydrous manganese chloride and calcium sulfate. The raw materials are waste liquid and manganese ore obtained from the production of titanium dioxide by the sulfuric acid method. Background technique [0002] The production of titanium dioxide by the sulfuric acid method is the acid hydrolysis reaction of ferro-titanium powder and concentrated sulfuric acid to produce titanium sulfate, which is hydrolyzed to generate metatitanic acid, and then calcined and crushed to obtain titanium dioxide products. The chemical reaction principle is: [0003] Fe 2 O 3 +3H 2 SO 4 ==Fe 2 (SO 4 ) 3 +3H 2 O [0004] TiO 2 +2H 2 SO 4 ==Ti(SO 4 ) 2 +2H 2 O [0005] Fe+Fe 2 (SO 4 ) 3 ==3FeSO 4 [0006] Ti(SO 4 ) 2 +3H 2 O==H 2 TiO 3 ↓+2H 2 SO 4 , [0007] H 2 TiO 3 =TiO 2 +H 2 O. [0008] In the product...

Claims

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Application Information

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IPC IPC(8): C01G45/10C01G45/06C01F11/46B09B3/00
CPCY02W30/82
Inventor 王嘉兴
Owner 王莉
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