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Preparation method for thallous chloride based on interface interaction

A technology of thallous chloride, which is applied in the field of preparation of metal compounds, can solve the problems of thallous chloride with many impurities, complicated purification, and high content of heavy metals

Active Publication Date: 2019-01-11
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese invention patent "A method for preparing thallium chloride by using lead-zinc ore smelting wastewater as raw material" (application number 201410023981.1, application date is January 18, 2014): it uses lead-zinc ore waste residue and smelting wastewater by 1 : Stir at a ratio of 500, add lime to precipitate, absorb and co-precipitate to obtain bottom mud, extract thallium from wastewater to prepare thallium chloride, but there are some shortcomings: lead-zinc ore is a polymetallic mineral, lead-zinc ore waste residue and heavy metals in smelting wastewater The content is high, and the obtained thallous chloride has many impurities, and the purification is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] This embodiment provides a method for preparing thallous chloride with a base interface effect, which includes the following steps in sequence:

[0085] S1) Grinding and pulverizing the sulfuric acid ash, adding dilute acid to the sulfuric acid ash, stirring and shaking for 4-6 hours, and filtering to obtain filtrate I and filter residue I;

[0086] S2) Continue to add dilute acid to the filter residue I, repeat the operation of step S1), the number of repetitions is at least 3 times, and obtain filtrate II and filter residue II;

[0087] S3) Contain F in the filter residue II - dilute acid, stirred and then filtered to obtain the filtrate Ш;

[0088] S4) combining the filtrate I, the filtrate II and the filtrate Ш to obtain the thallium extract I;

[0089] S5) Add bromine water dropwise to the thallium extract I until slightly yellow, add activated carbon modified by hydrochloric acid, stir for 30-60min, and filter to obtain the activated carbon mixture;

[0090] S6...

Embodiment 2

[0095] This embodiment provides a method for preparing thallous chloride with a base interface effect, which includes the following steps in sequence:

[0096] S1) Grind and pulverize the sulfuric acid ash, and pass it through a 200-mesh screen (the particle size of the pulverized sulfuric acid ash is ≤0.08mm); take 10kg of the pulverized sulfuric acid ash, and add the pH value according to the solid:liquid weight ratio=1:6. 3 hydrochloric acid, stirred and oscillated for 6 hours, and filtered to obtain filtrate I and filter residue I;

[0097] S2) According to the solid: liquid weight ratio = 1:6, continue to add hydrochloric acid with a pH value of 3 to the filter residue I, and repeat the operation of step S1) 3 times to obtain filtrate II and filter residue II;

[0098] S3) According to solid: liquid weight ratio = 1:1, add 0.3mg / L F - and hydrochloric acid with a pH value of 3, after stirring and standing still, filter to obtain the filtrate Ш;

[0099] S4) combining fi...

Embodiment 3

[0104] This embodiment provides a method for preparing thallous chloride with a base interface effect, which includes the following steps in sequence:

[0105] S1) Grind and pulverize the sulfuric acid ash, and pass through a 200-mesh sieve (the particle size of the pulverized sulfuric acid ash is ≤0.08mm); take 10kg of the pulverized sulfuric acid ash, and add the pH value according to the solid:liquid weight ratio=1:12.5 3 of sulfuric acid, stirred and oscillated for 6 hours, and filtered to obtain filtrate I and filter residue I;

[0106]S2) According to solid: liquid ratio weight = 1:12.5, continue to add sulfuric acid with a pH value of 3 to the filter residue I, and repeat the operation of step S1) 3 times to obtain filtrate II and filter residue II;

[0107] S3) According to solid: liquid weight ratio = 1:1, add 0.15mg / L F - And the sulfuric acid with a pH value of 3 is filtered after stirring to obtain the filtrate Ш;

[0108] S4) combining filtrate I, filtrate II an...

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Abstract

The invention discloses a preparation method for thallous chloride based on interface interaction, belonging to the technical field of preparation of metallic compounds. The preparation method comprises the following steps: extracting Tl<+> with sulfate ash, dilute acid and dilute acid containing F<-> as raw materials and then oxidizing the Tl<+> into Tl<3+> by using bromine water; adsorbing Tl<3+> by using hydrochloric acid-modified active carbon, and reducing and eluting Tl<+> from the hydrochloric acid-modified active carbon by using an ammonium oxalate solution so as to obtain a Tl<+> eluate; and adding chloride into the Tl<+> eluate and carrying out stirring and heating to allow a TlCl crystal to be precipitated. The preparation method of the invention can shorten extraction time andprepare purer thallous chloride.

Description

technical field [0001] The invention belongs to the technical field of metal compound preparation, and in particular relates to a preparation method of thallous chloride based on interfacial interaction. Background technique [0002] The wide valence band (4ev) of thallous chloride crystal is about 2-4 times that of general insulating crystal (1-2ev), and the band gap (3ev) is only 1 / 3 of that of general insulating crystal (about 10ev). Thallium crystal is a good semiconductor material, which is widely used in security detection and imaging fields. Thallous chloride is also a chemical raw material for preparing thallium reagents, and various high-purity thallium reagents can be prepared by using thallous chloride as a raw material. [0003] Chinese invention patent "A method for preparing thallium chloride by using lead-zinc ore smelting wastewater as raw material" (application number 201410023981.1, application date is January 18, 2014): it uses lead-zinc ore waste residue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00
CPCC01G15/00
Inventor 吴颖娟陈迪云邓湘舟崔明超王伟彤庞博
Owner GUANGZHOU UNIVERSITY
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