Preparation method of gamma-copper iodide

A cuprous iodide and iodide ion technology, applied in the direction of copper halide, etc., can solve the problems of poor recovery of free iodine, complicated operation steps, and increased production costs, and achieve simple equipment, improve product quality, and reduce raw material costs. Effect

Inactive Publication Date: 2014-11-26
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are deficiencies in this method, mainly because a large amount of free iodine will be produced during the preparation process (free iodine is produced as a by-product when the initial product copper iodide is unstable and converted into cuprous iodide), and the difficulty in product separation leads to a decrease in iodine utilization and increased production costs; Using organic solvents to extract and recover free iodine from the product mixture, the operation steps are complicated, and iodine resources are wasted due to poor recovery of free iodine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method for gamma-cuprous iodide, comprising the steps of:

[0015] (1) Reduction of iodine with hydrazine hydrate: Add 25.64g of iodine with a mass concentration of 99% to 90g of water, then add 25.66g of hydrazine hydrate with a mass concentration of 80% to the aqueous solution of iodine for a mixed reaction to obtain an iodide ion solution;

[0016] (2) Preparation of γ-cuprous iodide: at 200r·min -1 Under the action of stirring, the iodide ion solution was mixed at 5mL·min -1 Add 50.44 g of copper sulfate solution with a mass concentration of 99% at a flow rate, fully react for 10 min, filter, and dry to obtain γ-cuprous iodide.

[0017]

Embodiment 2

[0019] A preparation method for gamma-cuprous iodide, comprising the steps of:

[0020] (1) Reduction of iodine with hydrazine hydrate: Add 25.64 g of iodine with a mass concentration of 99% to 126 g of water, then add 26.91 g of hydrazine hydrate with a mass concentration of 80% to the aqueous solution of iodine for a mixed reaction to obtain an iodide ion solution;

[0021] (2) Preparation of γ-cuprous iodide: at 400r min -1 Under the action of stirring, the iodide ion solution was mixed at 10mL·min -1 Add 52.96 g of copper sulfate solution with a mass concentration of 99% at a flow rate, fully react for 15 min, filter, and dry to obtain γ-cuprous iodide.

[0022]

Embodiment 3

[0024] A preparation method for gamma-cuprous iodide, comprising the steps of:

[0025] (1) Reduction of iodine with hydrazine hydrate: Add 25.64 g of iodine with a mass concentration of 99% to 162 g of water, then add 28.16 g of hydrazine hydrate with a mass concentration of 80% to the iodine aqueous solution for a mixed reaction to obtain an iodide ion solution;

[0026] (2) Preparation of γ-cuprous iodide: at 600r·min -1 Under stirring, the iodide ion solution was mixed at 15mL·min -1 Add 50.44 g of copper sulfate solution with a mass concentration of 99% at a flow rate, fully react for 20 min, filter, and dry to obtain γ-cuprous iodide.

[0027]

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PUM

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Abstract

The invention discloses a preparation method of gamma-copper iodide. The preparation method comprises the following steps: adding iodine into water so as to obtain an iodic aqueous solution and adding hydrazine hydrate into the iodic aqueous solution for mixed reaction to obtain an iodide ion solution, wherein the molar ratio of the iodine to the water is controlled at 1:(50-90) and the molar ratio of the hydrazine hydrate to the iodine is controlled at (4.1-4.5):1.0; and adding the iodide ion solution into a copper sulfate solution under the stirring effect, controlling the molar ratio of copper sulfate to iodine at (2.0-2.2):1.0, fully reacting, filtering and drying to obtain gamma-copper iodide. According to the preparation method, the iodine utilization rate is high, a product is less in possibility of being oxidized and decomposed, the production cost is low, and the process is simple.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of γ-cuprous iodide. [0002] Background technique [0003] γ-Cuprous iodide (γ-CuI) belongs to sphalerite structure, energy band gap 3.1eV, low stability, easy to oxidize and decompose. It can be used in the fields of solar cells, superconducting materials, photocatalysts, ultra-high counters, food and feed additives, etc., and has a wide range of uses and high added value. [0004] At present, the synthesis of γ-cuprous iodide mainly adopts liquid phase precipitation method, using soluble copper salt (copper sulfate, copper acetate, etc.) and soluble iodine salt (sodium iodide, potassium iodide, etc.) as copper source and iodine source respectively. Water is used as a solvent for chemical precipitation reaction. However, there are deficiencies in this method, mainly because a large amount of free iodine will be produced during the preparation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/04
Inventor 刘飞曹建新门晓刚林倩潘红艳王晓丹
Owner GUIZHOU UNIV
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