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A kind of purification method of copper nitrate

A purification method, copper nitrate technology, applied in the direction of copper nitrate, etc., can solve the problems of high raw material requirements, complicated production process, etc., and achieve the effects of wide sources, stable product quality, safe and easy operation

Active Publication Date: 2017-08-22
SINOPHARM CHEM REAGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for purifying copper nitrate to overcome the shortcomings of high raw material requirements and complicated production process in the existing method for preparing high-purity copper nitrate

Method used

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  • A kind of purification method of copper nitrate

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Experimental program
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Effect test

Embodiment 1

[0023] Dissolve 100g of industrial copper nitrate in 500ml of high-purity water with a specific impedance greater than 17MΩ·cm, adjust to pH 2 with 5wt% high-purity dilute nitric acid, add 2g of solid sodium sulfide, stir for 1 hour at room temperature, and filter after standing. The filtrate is passed through a glass column loaded with weak base-strong acid ion exchange resin D511 (the weak base ion exchange group is primary amine, and the strong acid ion exchange group is sulfonic acid group.), and the water is distilled off under normal pressure, cooled At 10°C, the precipitated crystals were filtered and vacuum-dried at a temperature of 40°C for 12 hours to obtain 91 g of purified copper nitrate.

[0024] The test results show that all the indicators of the product meet the standard spectroscopically pure 4N standard (copper nitrate used in the electronics industry), and the specific test data are shown in Table 1.

Embodiment 2

[0026] Dissolve 100g of industrial copper nitrate in 1000ml of high-purity water with a specific impedance greater than 17MΩ·cm, adjust to pH 3 with 10wt% high-purity dilute nitric acid, add 5g of solid sodium sulfide, stir for 2 hours at room temperature, and filter after standing. Pass the filtrate through a glass column loaded with weak base-strong acid ion exchange resin D512 (the weakly basic ion exchange group is a tertiary amine, and the strongly acidic ion exchange group is a sulfonic acid group.), and distill off moisture under normal pressure , cooled to 5° C., filtered the precipitated crystals, and dried in vacuum at a temperature of 60° C. for 8 hours to obtain 88 g of purified copper nitrate.

[0027] The test results show that all the indicators of the product meet the standard spectroscopically pure 4N standard (copper nitrate used in the electronics industry), and the specific test data are shown in Table 1.

[0028] Table 1

[0029]

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Abstract

The invention discloses a copper nitrate purification method, comprising: taking industrial copper nitrate as a raw material; dissolving the industrial copper nitrate in high purity water with the specific impedance being greater than 17 Mohm.cm; adjusting the pH value by using high purity diluted nitric acid; adding in solid sodium sulfide; stirring the material at room temperature; keeping the material standing; performing filtering; making the filtrate run through a glass column loaded with weak base-strong acid ion exchange resin; performing distilling at the atmospheric pressure to remove water; performing cooling; and filtering and vacuum drying precipitated crystals to obtain purified copper nitrate. The measured value of the copper nitrate obtained from the purification method provided by the invention reaches 99.99%, with each indicator in line with copper nitrate spectrum pure 4N standard in the electronics industry. The invention has a good effect of impurity removal, has high efficiency, is safe and convenient in operation, has stable product quality and is suitable for industrial production.

Description

technical field [0001] The invention relates to a copper nitrate purification method, in particular to a purification method using industrial copper nitrate as a raw material. Background technique [0002] Copper nitrate is an important industrial raw material. Among them, solid copper nitrate has three types: anhydrous, trihydrate and hexahydrate. Cu(NO 3 ) 2 ·6H 2 O is a blue orthorhombic crystal, which loses three molecules of crystal water at 26.4°C and becomes trihydrate, which is a dark blue triangular crystal. Copper nitrate is widely used in copper plating in the electroplating industry, and can be used as a colorant in the enamel industry, an oxidant in the chemical industry, a photosensitive material, a mordant for textile dyeing, a gloss agent for aluminum, a catalyst for promoting organic reactions, medicine, insecticide agent etc. [0003] Spectrally pure copper nitrate is used in the production and electroplating of picture tubes, but currently the copper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/08
Inventor 顾金凤郑琦胡鸣薛循育方诚
Owner SINOPHARM CHEM REAGENT
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