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A kind of preparation method of thallous iodide based on interfacial interaction

The technology of thallium iodide and its effect is applied in the field of metal compound preparation and can solve the problems of complicated purification, many impurities of thallium iodide and high content of heavy metals

Active Publication Date: 2020-12-25
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can reduce the cost of preparing thallium iodide, but there are some shortcomings: lead-zinc ore is a polymetallic mineral, and the content of heavy metals in lead-zinc ore waste residue and smelting wastewater is high, and the obtained thallium iodide has many impurities and complicated purification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082]This embodiment provides a method for preparing thallium iodide based on interface function, which sequentially includes the following steps:

[0083]S1) Grind and crush the sulfuric acid ash residue, add dilute acid to the sulfuric acid ash residue, stir and shake for 3-6 hours, and filter to obtain filtrate I and filter residue I;

[0084]S2) Continue to add dilute acid to the filter residue I, repeat the operation of step S1), and repeat at least 3 times to obtain filtrate II and filter residue II;

[0085]S3) Add F to filter residue Ⅱ-Dilute acid, stir and stand and filter to obtain filtrate Ш;

[0086]S4) Combine filtrate I, filtrate II and filtrate Ш to obtain thallium extract I;

[0087]S5) Add bromine water dropwise to the thallium extract I until it is slightly yellow, then add hydrochloric acid modified activated carbon, stir for 30-60 min, and filter to obtain an activated carbon mixture;

[0088]S6) Use the heated ammonium oxalate solution to rinse the activated carbon mixture sever...

Embodiment 2

[0093]This embodiment provides a method for preparing thallium iodide based on interface function, which sequentially includes the following steps:

[0094]S1) Grind and pulverize the sulfuric acid ash, and pass it through a 200-mesh screen (the particle size of the sulphuric acid ash after pulverization is less than or equal to 0.08mm); take 5kg of the crushed sulfuric acid ash and add the pH value according to the solid: liquid weight ratio = 1:6 3.7 hydrochloric acid, stir and shake for 4.7h, filter to obtain filtrate I and filter residue I;

[0095]S2) According to the solid:liquid weight ratio=1:6, continue to add hydrochloric acid with a pH of 3.7 to the filter residue I, and repeat the operation of step S1) 3 times to obtain filtrate II and filter residue II;

[0096]S3) Add 0.3mg / L F to the filter residue Ⅱ according to the weight ratio of solid: liquid=1:1-Hydrochloric acid with a pH of 3.7, stir and stand and filter to obtain filtrate Ш;

[0097]S4) Combine filtrate I, filtrate II and...

Embodiment 3

[0102]This embodiment provides a method for preparing thallium iodide based on interface function, which sequentially includes the following steps:

[0103]S1) Grind and pulverize the sulfuric acid ash, and pass it through a 200 mesh screen (the particle size of the sulphuric acid ash after crushing is less than or equal to 0.08mm); take 10kg of the crushed sulphuric acid ash, add the pH value according to the solid: liquid weight ratio = 1:12.5 3 nitric acid, stir and shake for 3 hours, filter to obtain filtrate I and filter residue I;

[0104]S2) According to the solid:liquid weight ratio=1:12.5, continue to add nitric acid with a pH of 3 to the filter residue I, and repeat the operation of step S1) 3 times to obtain the filtrate II and the filter residue II;

[0105]S3) Add 0.15mg / L F to the filter residue Ⅱ according to the weight ratio of solid to liquid=1:1-And the nitric acid with a pH value of 3, stir and stand and filter to obtain the filtrate Ш;

[0106]S4) Combine filtrate I, filtrat...

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Abstract

The invention discloses a preparation method of thallous iodide based on interface action, belonging to the technical field of metal compound preparation. The preparation method comprises the following steps of extracting Tl<+> by using sulfuric acid ash, diluted acid and diluted acid containing F<-> as raw materials, and then oxidizing Tl<+> into Tl<3+> by using bromine water; adsorbing Tl<3+> byusing hydrochloric acid-modified active carbon, and reducing and eluting Tl<+> from the hydrochloric acid-modified active carbon by using an ammonium oxalate solution to obtain Tl<+> eluent; adding an iodine compound into the Tl<+> eluent, stirring and cooling to separate out TlI crystal. By the preparation method, the extraction time can be shortened, and a purer thallous iodide is prepared.

Description

Technical field[0001]The invention belongs to the technical field of metal compound preparation, and in particular relates to a preparation method of thallium iodide based on interfacial action.Background technique[0002]Thallium iodide (TlI) can increase the optical fiber's transmittance to carbon dioxide laser, making its performance better than silica optical fiber. The high-pressure mercury-thallium lamp filled with thallium iodide is a green light source, and thallium iodide as an additive can improve the photoelectric performance of the lamp when combined with other luminescent materials. Thallium iodide can be widely used in special light sources for signal lamp production and chemical light reactions. Thallium iodide is often prepared with thallium metal as a raw material, dissolved in nitric acid and precipitated with potassium iodide; this preparation method has a higher cost.[0003]According to "Thallium, 2015 World Market Review and Forecast", China, Kazakhstan and Russia ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00
CPCC01G15/00
Inventor 吴颖娟陈永亨张平罗定贵黄雪夏刘娟李祥平
Owner GUANGZHOU UNIVERSITY
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