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Method for decomposing biotite by using dilute hydrochloric acid and barium nitrate

A technology of dilute hydrochloric acid and barium nitrate, applied in aluminum silicate, silicate and other directions, can solve the problems of high harm and high equipment requirements, and achieve the effects of low equipment requirements, simple process and low cost

Inactive Publication Date: 2017-03-01
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of existing biotite decomposition methods and the shortcomings of traditional hydrofluoric acid dissolving biotite, which require high equipment and great harm, and provide a method for decomposing biotite using dilute hydrochloric acid and barium nitrate

Method used

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  • Method for decomposing biotite by using dilute hydrochloric acid and barium nitrate
  • Method for decomposing biotite by using dilute hydrochloric acid and barium nitrate
  • Method for decomposing biotite by using dilute hydrochloric acid and barium nitrate

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Use a ball mill to pulverize biotite ore and pass through a 200-mesh sieve to obtain biotite powder.

[0024] (2) Mix 0.5g of biotite powder with 100mL of dilute hydrochloric acid with pH=2, add 20g of barium nitrate thereto and mix well. The mixed solution was placed in a constant temperature water bath at 60° C. to stir for reaction (the mixed solution at this temperature was a saturated solution of barium nitrate), and after 5 hours, it was filtered and dried to obtain a solid. Under the same conditions, accurately weigh the solid obtained above and add it to dilute hydrochloric acid, keeping the ratio of the two at 1g:200ml. According to the content of dilute hydrochloric acid, the added barium nitrate makes the mixed solution saturated with barium nitrate at the reaction temperature, reacts in a constant temperature water bath at 60°C and filters to obtain a solid. Repeat the above operation 3 times.

[0025] Analyze the last solid insoluble matter with X-ray...

Embodiment 2

[0027] (1) Use a ball mill to pulverize biotite ore and pass through a 200-mesh sieve to obtain biotite powder.

[0028] (2) Mix 0.5g of biotite powder with 100mL of dilute hydrochloric acid with pH=1.5, add 20g of barium nitrate therein and mix well. The mixed solution was placed in a constant temperature water bath at 60° C. to stir for reaction (the mixed solution at this temperature was a saturated solution of barium nitrate), and after 5 hours, it was filtered and dried to obtain a solid. Under the same conditions, accurately weigh the solid obtained above and add it to dilute hydrochloric acid, keeping the ratio of the two at 1g:200ml. According to the content of dilute hydrochloric acid, the added barium nitrate makes the mixed solution saturated with barium nitrate at the reaction temperature, reacts in a constant temperature water bath at 60°C and filters to obtain a solid. Repeat the above operation 3 times.

[0029] Analyze the last solid insoluble matter with X-r...

Embodiment 3

[0031] (1) Use a ball mill to pulverize biotite ore and pass through a 200-mesh sieve to obtain biotite powder.

[0032] (2) Mix 0.5g of biotite powder with 100mL of dilute hydrochloric acid with pH=1, add 20g of barium nitrate thereto and mix well. The mixed solution was placed in a constant temperature water bath at 60° C. to stir for reaction (the mixed solution at this temperature was a saturated solution of barium nitrate), and after 5 hours, it was filtered and dried to obtain a solid. Under the same conditions, accurately weigh the solid obtained above and add it to dilute hydrochloric acid, keeping the ratio of the two at 1g:200ml. According to the content of dilute hydrochloric acid, the added barium nitrate makes the mixed solution saturated with barium nitrate at the reaction temperature, reacts in a constant temperature water bath at 60°C and filters to obtain a solid. Repeat the above operation 3 times.

[0033] Analyze the last solid insoluble matter with X-ray...

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Abstract

The invention relates to a method for decomposing biotite by using dilute hydrochloric acid and barium nitrate. The method is characterized in that biotite is crushed, the crushed powder and dilute hydrochloric acid with a pH value of 1-2 are mixed according to the proportion of 1g: 200ml, according to the different addition and reaction temperature of the dilute hydrochloric acid, adding barium nitrate in a solution, heating the solution to the reaction temperature for guaranteeing that a mixing solution is a barium nitrate saturated solution, reacting the material for 3-8 h and filtering the material, and repeating the above processes for 4 times on the filtered residual solid under same condition to obtain the product. In the invention, hydrochloric acid is combined with ferrous ions in octahedral site of NO<3->oxidized biotite in the barium nitrate solution, the barium ions are used for exchanging interlayer potassium ions, biotite enable gradual spalling to small fragments, so that a purpose of decomposing and extracting potassium is achieved. The method has the advantages of simple step, fast speed, low equipment requirement, and recoverable raw materials, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical metallurgy, and in particular relates to a method for decomposing biotite with dilute hydrochloric acid and barium nitrate. Background technique [0002] Biotite is one of the mica group minerals, which belongs to layered silicate structure, and is mainly deposited in mineral rocks such as granite and shale. According to the exploration and testing report of the national geological department, my country has rich reserves of biotite ore, so the research on biotite has become a hot topic in recent years. At present, the application research on biotite is mainly divided into two categories: 1. Retain the good sheet structure of biotite and apply it to the polymer field after modification; 2. Use biotite as raw material to extract important metal elements, Such as potassium, alum, rubidium and so on. Potassium is one of the two most scarce non-gold mines in my country. It is an important raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26
CPCC01B33/26C01P2002/72C01P2004/03
Inventor 黄志良李紫谦危钰李文昭
Owner WUHAN INSTITUTE OF TECHNOLOGY
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